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Western Safety Products, Inc. 505 South Lander St., Seattle, WA 98134
Toll Free: (888) 823-0808 Phone: (206) 264-0808 Fax: (206) 264-4921
Website: http://www.westernsafety.com sales@westernsafety.com

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Kestrel Weather Meters 2012 - Page 1


For more information, call Western Safety Products at 206-264-0808 or email sales@westernsafety.com.

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Kestrel Meters - 2012
  Kestrel Meter Models
Available Functions
1000
Part #0810
2000
Part #0820
2500
Part #0825
2500NV
Part #0825NV
3000
Part #0830
3500
Part #0835
3500NV
Part #0835NV
4000
Part #0840
4000NV
Part #0840NV
TAN/OLV
4500
Part #0845
4500NV
Part #0845NV
TAN/OLV
3500 DeltaT
Part #0835DT
4200
Part #0842
4250
Part #08425
4300
Part #0843
4500 NV Horus
Part #0845HOLV
Part #0845HTAN
 
 
 
 
 
 
 
 
4000BT
Part #0840B
4000 NV BT
Part #0840BNV
TAN/OLV
4500BT
Part #0845B
4500NVBT
Part #0845BNV
TAN/OLV
 
4200BT
Part #0842B
4250 BT
Part #08425B 
4300BT
Part #0843B
4500 NV BT Horus
Part #0845HBOLV
Part #0845HBTAN
Wind Speed
Volume Air Flow
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Temperature
 
Wind Chill
 
 
*
Relative Humidity
 
 
 
 
 
Heat Stress Index
 
 
 
 
 
*
Dewpoint Temp
 
 
 
 
Wet Bulb Temp
 
 
 
 
 
*
Humidity Ratio
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Evaporation Rate
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
DeltaT
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Barometric Pressure
 
 
 
*
Absolute Pressure
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Altitude
 
 
 
 
Air Density
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Density Altitude
 
 
 
 
 
 
 
 
Digital Compass
 
 
 
 
 
 
 
 
 
·
 
 
 
 
Wind Direction
 
 
 
 
 
 
 
 
 
 
 
 
 
Crosswind
 
 
 
 
 
 
 
 
 
 
 
 
 
HeadwindlTailwind
 
 
 
 
 
 
 
 
 
 
 
 
 
Backlit Display
 
 
 
tactical,
night-vision
preservlng
 
 
tactical,
night-vision
preserving
 
tactical,
night-vision
preserving
 
 
tactical,
night-vision
preserving
 
 
 
 
tactical,
night-vision
preserving
Pressure Trend
 
 
 
 
*
 
Data Storage & Charting
 
 
 
 
 
 
 
 
Data Upload
 
 
 
 
 
 
 
 
Clock
 
 
 
Ballistics Software
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Case Color
Blue
Green
Orange
Olive Drab
Brick Red
Yellow
Olive Drab
Charcoal
Safety Orange
Olive Drab
Olive Drab
Desert Tan
Yellow
Olive Drab
Desert Tan
Yellow
Safety Orange
Safety Orange
 
Olive Drab
Desert Tan
* Hidden Function - This feature turned off by default

Kestrel Meter Measurements
Kestrel Features
Kestrel Meter Measurements

Wind Speed: The rate of the motion of the air on a unit of time.

Beaufort Wind Scale: A system of estimating and reporting wind speeds based on the Beaufort Force or Number, which is composed of the wind speed, a descriptive term, and the visible effects upon land objects and/or sea surfaces.

Volume Air Flow (CFM):
The volume of air moving through a given space over a unit of time. Calculated by multiplying the surface area of the opening times the air velocity.

Wind Direction:
The direction from which the wind is blowing, expressed as a compass point or degrees.

Cross Wind:
The component of the wind blowing at right angles to a given direction of travel, such as an aircraft or bullet's line of flight, calculated by multiplying the wind speed times the sine of the angle between the wind and the direction of travel.

Head/Tail Wind:
The component of the wind blowing against (head wind) or with (tail wind) a given direction of travel, such as an aircraft or bullet's line of flight, calculated by multiplying the wind speed times the cosine of the angle between the wind and the direction of travel.

Relative Humidity:
The ratio of the amount of water vapor in the air at a specific temperature to the maximum amount that the air could hold at that temperature, expressed as a percentage. Rela­tive humidity is a function of temperature and therefore changes as the temperature changes, even if the amount of moisture in the air remains constant.

Dewpoint:
The temperature at which the water vapor in the atmosphere begins to condense. Any further cooling causes con­densation (fog and dew). This is also the temperature of saturation at which the dry-bulb, wet-bulb, and dew-point temperatures are all the same.

Wet Bulb:
The lowest temperature in the ambient atmosphere yielded by evaporating water from a wet muslin-covered bulb of a thermometer.

Humidity Ratio:
The amount of water vapor mixed with one unit mass of dry air, usually expressed as grams of water vapor per kilogram of air. Also called mixing ratio.

Evaporation Rate: The rate at which moisture is lost from
a surface for a given humidity, temperature and wind speed. Evaporation rate is a critical environmental indicator that concrete contractors use to ensure they avoid plastic shrinkage cracks in concrete installations especially concrete flatwork.

Temperature (Air/Water/Snow): Air temperature is the ambient temperature of the air and water vapor as measured by a thermometer or other measuring device in which the thermal element is dry and shielded from radia­tion. Water and snow temperature are measured with a measuring device in direct contact with the environment. Available units are Fahrenheit - a temperature scale where water at sea level has a freezing point of +32º F (Fahrenheit) and a boiling point of +212º F and Celsius - a temperature scale where water at sea level has a freezing point of 0º C and a boiling point of +100º C.

Delta-T: The spread between the wet bulb temperature and the dry bulb temperature (in degrees C). Delta-T offers a quick guide to determining acceptable spraying condi­tions or ideal spray nozzle.

Wind Chill: The temperature of windless air that
would have the same effect on exposed human skin as a given combination of wind speed and air temperature. (NWS 2001 Wind Chill formula with adjusted wind speed.)

Heat Stress Index:
A measurement of the air tempera­ture in relation to the relative humidity, used as an indicator of the perceived temperature.

Barometric Pressure:
The atmospheric pressure of the weight of the air above the measurements point, reduced to sea level. Also known as mean sea level pressure.

Absolute Pressure:
The actual measured pressure of the weight of air above the measurement point. Also called station pressure.

Altitude: The height of an object above mean sea level.

Air Density (Grains):
The actual weight of a given volume of air.

Density Altitude:
The equivalent altitude in the ICAO standard reference atmosphere for the measured temperature, relative humidity and air pressure. A measure used primarily by pilots, high-performance engine mechanics and long-range shooters.

Relative Air Density:
The ratio of the calculated air density to the air density at sea level using the ICAO standard reference conditions.

Kestrel 1000 & Kestrel 2000
Kestrel 1000 Pocket Wind Meter Kestrel 2000 Pocket Weather Meter

Here's the one that started it all! We developed the Kestrel 1000 Pocket Wind Meter in 1995 when NK co-owner, Richard Kellerman, needed a reliable wind meter for flying his glider. Over 10 years later, it looks a little slicker, and it still gives you the reliable, accurate wind measurements that you need. The large impeller turns in the faintest of breezes and is easily replaced. The hard cover lets you throw the Kestrel 1000 into your pack without damage.

Part No. 0810

For those of you who like to know just how cold and windy it really is, the Kestrel 2000 Pocket Weather Meter is your reality check. Whether planning your shot, or checking to see how low the wind chill can go, the Kestrel 2000 is the easy-to-use tool you need. Thanks to the external temperature sensor, the Kestrel 2000 can take accurate water and snow temperature readings too. The backlight lets you check the temperature in your tent, without finding your flashlight. Like all Kestrel meters, it's fully waterproof and it floats.

Part No. 0820

Measurements
Current Wind Speed
Average Wind Speed
Maximum Wind Gust

Measurements
Wind Chill
Air Temperature
Water Temperature
Snow Temperature
Current Wind Speed
Average Wind Speed
Maximum Wind Gust

Features
Waterproof & Floats
Hold Function
User-Replaceable Impeller

Features
Backlight
Waterproof & Floats
Hold Function
User-Replaceable Impeller
External Temperature Sensor

Includes
Slip-On Protective Cover
Neck Lanyard
Battery - CR2032 Coin Cell

Includes
Slip-On Protective Cover
Neck Lanyard
Battery - CR2032 Coin Cell

"I fly model planes and checking the wind is important. The Kestrel 1000 is a reliable device that continues to attract positive attention wherever I use it. We've compared it favorably to other brands costing far more. I highly recommend it to anyone who wants a quick, convenient and reliable read on the wind."
- Tom Polk, Farmington Hills, MI

Kestrels were on the slopes at the 2006 ESPN X Games in Aspen, Colorado. Used to report current weather conditions, Kestrel Meters kept riders and spectators abreast of the weather information they needed.

Kestrel 2500 & Kestrel 3000
Kestrel 2500 Pocket Weather Meter Kestrel 3000 Pocket Weather Meter

The Kestrel 2500 takes the great features of the Kestrel 2000 and adds in a pressure sensor. A three-hour pressure trend indicator helps you predict fish and wildlife activity and know when the weather's going to turn nasty. With its easy­to-use digital pressure altimeter, you have the perfect instrument for any outdoor activity.

Part No. 0825

NK was the first to provide accurate relative humidity measurements from a hand-held weather meter, and the Kestrel 3000 has since become practically required equipment for wildland firefighters. We've improved the humidity response speed for greater accuracy in changing conditions, and with the Heat Stress Index and Wet Bulb readings from the Kestrel 3000, you'll have environmental information to let you know when conditions become unhealthy for strenuous exercise.

Part No. 0830

Measurements
Barometric Pressure
Pressure Trend
Altitude
Wind Chill
Air Temperature
Water Temperature
Snow Temperature
Current Wind Speed
Average Wind Speed
Maximum Wind Gust

Measurements
Relative Humidity
Dewpoint
Heat Stress Index
Wind Chill
Air Temperature
Water Temperature
Snow Temperature
Current Wind Speed
Average Wind Speed
Maximum Wind Gust

Features
Clock
Backlight
Waterproof & Floats
Hold Function
User-Replaceable Impeller
External Temperature Sensor

Features
Backlight
Waterproof & Floats
Hold Function
User-Replaceable Impeller
External Temperature Sensor
Patented Quick-Response RH Sensor

Includes
Slip-On Protective Cover
Neck Lanyard
Battery - CR 2032 Coin Cell

Includes
Slip-On Protective Cover
Neck Lanyard
Battery - CR 2032 Coin Cell

"The Kestrel pocket weather meter is essential for target rifle shooting. It helps me win matches, and I rely on it for accurate weather information."
- Lones Wigger, USA National and Olympic Rifle Champion Shooter

One of the key reasons that concrete cracks is that weather conditions cause excessive moisture loss right after the concrete is placed. To successfully place concrete crack-free, the concrete's temperature, along with the air temperature, wind velocity and humidity must be monitored. The Kestrel 3000 is the perfect tool! It was used by The American Concrete Industry (ACI) on their 2006 trip to Algeria for the inauguration of the Algerian Chapter of the ACI.

Kestrel 2500 & Kestrel 3000
Kestrel 2500 Pocket Weather Meter Kestrel 3000 Pocket Weather Meter

The Kestrel 2500 takes the great features of the Kestrel 2000 and adds in a pressure sensor. A three-hour pressure trend indicator helps you predict fish and wildlife activity and know when the weather's going to turn nasty. With its easy­to-use digital pressure altimeter, you have the perfect instrument for any outdoor activity.

Part No. 0825

NK was the first to provide accurate relative humidity measurements from a hand-held weather meter, and the Kestrel 3000 has since become practically required equipment for wildland firefighters. We've improved the humidity response speed for greater accuracy in changing conditions, and with the Heat Stress Index and Wet Bulb readings from the Kestrel 3000, you'll have environmental information to let you know when conditions become unhealthy for strenuous exercise.

Part No. 0830

Measurements
Barometric Pressure
Pressure Trend
Altitude
Wind Chill
Air Temperature
Water Temperature
Snow Temperature
Current Wind Speed
Average Wind Speed
Maximum Wind Gust

Measurements
Relative Humidity
Dewpoint
Heat Stress Index
Wind Chill
Air Temperature
Water Temperature
Snow Temperature
Current Wind Speed
Average Wind Speed
Maximum Wind Gust

Features
Clock
Backlight
Waterproof & Floats
Hold Function
User-Replaceable Impeller
External Temperature Sensor

Features
Backlight
Waterproof & Floats
Hold Function
User-Replaceable Impeller
External Temperature Sensor
Patented Quick-Response RH Sensor

Includes
Slip-On Protective Cover
Neck Lanyard
Battery - CR 2032 Coin Cell

Includes
Slip-On Protective Cover
Neck Lanyard
Battery - CR 2032 Coin Cell

"The Kestrel pocket weather meter is essential for target rifle shooting. It helps me win matches, and I rely on it for accurate weather information."
- Lones Wigger, USA National and Olympic Rifle Champion Shooter

One of the key reasons that concrete cracks is that weather conditions cause excessive moisture loss right after the concrete is placed. To successfully place concrete crack-free, the concrete's temperature, along with the air temperature, wind velocity and humidity must be monitored. The Kestrel 3000 is the perfect tool! It was used by The American Concrete Industry (ACI) on their 2006 trip to Algeria for the inauguration of the Algerian Chapter of the ACI.

Kestrel 3500 & Kestrel NV
Kestrel 3500 Pocket Weather Meter Kestrel NV Meters

Many Kestrel users need to know everything that the weather is doing, but don't need to log the data. We developed the Kestrel 3500 just for them. It provides comprehensive environmental data on nine different measurements with the simplicity of the Kestrel 1000. Simply turn it on and scroll left and right to see exactly what the environment is doing - in addition to the current weather readings, you'll be prepared for rapid weather changes with the three-hour barometric pressure trend. When you're done, slip on the hard cover and your Kestrel 3500 Pocket Weather Meter is just about indestructible.

Part No. 0835

Measurements and Features are the same as the Kestrel 2500, 3500, 4000 and 4500.

2500NV Part No. 0825NV
3500NV Part No. 0835NV
4000NV Part No. 0840NV
4500NV Part No. 0845NV

Measurements
Barometric Pressure
Pressure Trend
Altitude
Relative Humidity
Heat Stress Index
Dewpoint
Wet Bulb Temperature
Wind Chill
Air Temperature
Water Temperature
Snow Temperature
Current Wind Speed
Average Wind Speed
Maximum Wind Gust

With so many military personnel using Kestrel Meters, we developed the NV line just for them. Olive drab in color - to make them less visible, and with a visible red backlight - which helps protect the user's natural night vision.

Military personnel and pilots flying in darkness are often concerned with preserving their night vision. It takes 30 to 45 minutes for the average eye to adapt to darkness and maximize night vision. Even a short burst of white, yellow, green or blue light “bleaches out” the rod cell photoreceptors in the eye and causes night blindness until the entire adaptation process can take place again.

Light in the red spectrum does not cause this “bleaching out” preventing night blindness and night vision fatigue. This unit's red backlight is also much dimmer than a standard backlight, making it more difficult to detect with the naked eye in night operations.

Features
Clock
Backlight
Waterproof & Floats
Hold Function
User-Replaceable Impeller
External Temperature Sensor

Includes
Slip-On Protective Cover
Neck Lanyard
Battery - CR2032 Coin Cell

Playing golf in 115 degree weather here in Phoenix is possible if one does two things: hydrate-hydrate-hydrate, and keep a close eye on the heat index. The portability of the 3500, its reliability and its accuracy are all direct contributors to that preparation. As a life-long "weather geek" this product receives my highest recommendation.
- Bill Putnam, Rear Admiral, USN (Ret.), Phoenix, Arizona

"Accuracy counts when lives are on the line. Don't trust a look-alike. The Kestrel 4000NV is the ONLY choice when mission success or failure requires accurate weather data."
- S.W.A.T. 2006 Buyer's Guide

Kestrel 4000 Series & Kestrel 4000
Kestrel 4000 Series

In 2000, we introduced the Kestrel 4000 Pocket Weather Tracker, and today it is still the most comprehensive hand-held weather device on the market. Since its introduction, the 4000 series has expanded to include numerous customer-requested features not previously available in a hand-held meter.
The Kestrel 4000 series is unparalleled in its ease of use and totally customizable navigation and data display. In addition to measuring current environmental conditions, all models also track and store up to 2000 data points for each parameter so you can see what's happened in the past and forecast what's coming. With both automatic and manual data storage, the extensive data log can store the exact information that you need. Current conditions along with minimum, maximum and average values can be viewed, and stored data is charted on-screen with the date and time. You can even upload the stored information to your computer for use with dozens of applications.
Kestrel 4000 models have been put to the test in some of the harshest conditions on the planet. U.S. Special Forces, combat weather teams, wildland firefighters, smoke jumpers, Mt. Everest expeditions and IRL pit crews are just a few who rely on a Kestrel 4000 model to provide them with the crucial environmental data they need. And, watch the Weather Channel during a hurricane, and you're sure to spot a Kestrel 4000 being wielded by an intrepid on-screen meteorologist.
If you need to see and track environmental conditions for your work or play, there's no better companion than the affordable, pocket-sized Kestrel 4000.

Mountain Rescue Association (MRA) was established in 1958 at Timberline Lodge at Mount Hood, Oregon and is the oldest Search and Rescue association in the United States.
The MRA is a non-profit organization with over 90 government authorized units in around the world, and has grown into the critical mountain search and rescue resource in the United States, performing over 4000 search and rescue missions per year.
The Kestrel 4000 is a critical piece of equipment for search and rescue teams across the country, and have been in packs of MRA members for years.

Kestrel 400 Pocket Weather Tracker

The Kestrel 4000 raised the bar to a new level when it comes to portable conditions monitoring. For just under 4 ounces, you get every environmental reading with the press of a single button. Durable? You bet. The 4000 has been subjected to impact, water submersion and extreme temperature tests, and keeps on working. Just ask the US Military - the Kestrel 4000 is on the "most wanted" for armed forces personnel in many different specialties.
Due to popular demand in a range of applications, the Kestrel 4000 is available in Gray, Olive Drab and Safety Orange. It's also available in the NV configuration - see the Olive Drab Kestrel 4000 with tactical red backlight.

Part No. 0840GRY (gray color)
Part No. 0840ORA (orange color)
Part No. 0840LV (olive drab)

The Kestrel 4000 was in action at the 2006 Turin Olympics as an official sponsor of the U.S. Biathlon Team. The athletes used them for the shooting portion of their event, and their wax techs wouldn't be caught without them - conditions such as humidity, temperature, and wind are crucial parameters to ensure proper waxing.
'The Kestrel 4000 has been a great help! It has the absolutely perfect precision needed to tell us the exact parameters. The best option is the memory function to see how conditions like humidity, temp, and wind change each day and what this means for wax and ski picking!"

Measurements
Altitude
Pressure Trend
Barometric Pressure
Relative Humidity
Heat Stress Index
Dewpoint
Wet Bulb Temperature
Density Altitude
Wind Chill
Air Temperature
Water Temperature
Snow Temperature
Current Wind Speed
Average Wind Speed
Maximum Wind Gust

Features
Waterproof & Floats
Automatic & Manual Data Storage
Data Upload (with optional interface)
Customizable Data Storage - 2000 data points
Minimum, Maximum & Average Values
Backlit Display
Data Charting
Five Languages- English, French, Spanish, German & Italian
User-Replaceable Impeller
Flip-Top Impeller Cover
Includes
Soft Carry Pouch
Wrist & Neck Lanyards
Batteries - 2 AAA

Kestrel 4100 & Kestrel 4200
Kestrel 4100 Pocket Air Flow Tracker Kestrel 4200 Pocket Air Flow Tracker

This model is discontinued, but this is left here for reference.
Do Not Order
.
CFM without a calculator? The Kestrel 4100 Pocket Air Flow Tracker makes it possible. For immediate and accurate air flow readings, simply enter the duct shape and dimensions, hold the 4100 in the air flow and the volume air flow readings are displayed ... no calculator required!
The Kestrel 4100 also measures temperature, relative humidity and dewpoint, either ambient or in any accessible airflow. This versatile instrument features a powerful data logger that records 2000 sets of measurements at user­selectable time intervals (over 2 years of data can be recorded). You may review the logged data with the 4100's on-screen graphing capabilities, or upload the data to a PC for in-depth review. The Kestrel 4100 is an affordable tool that is easy to carry and use and is perfect for facilities managers, HVAC equipment sales people, field installers and technicians.

Part No. 0841

New for 2007, the Kestrel 4200 has made HVAC technicians jobs even easier with automatic humidity ratio readings. Of particular interest to dehumidification professionals, the Kestrel 4200 measures relative humidity and calculates dewpoint, wet bulb temperature and heat stress index as well as the humidity ratio - and the patented dual chamber humidity sensor assures fast and accurate readings in any environment.
Like the 4100, the Kestrel 4200 has taken the calculations and guess-work out of Air Flow measurements with automatic air flow readings. Plus it measures every other environmental parameter and stores over two years worth of information in its built-in data logger. With on-screen customization, the 4200 can truly be personalized for every technician. Easy set-up screens allow unit to display only relevant readings, and hide screens not relative to the job.

Part No. 0842

Measurements
Current Air Velocity
Average Air Velocity
Maximum Air Velocity
Volume Air Flow
Relative Humidity
Heat Stress Index
Dewpoint
Temperature

Measurements
Humidity Ratio
Relative Humidity
Current Air Velocity
Average Air Velocity
Max Air Velocity
AirFlow
Temperature
Barometric Pressure
Dewpoint
Wet Bulb Temp
Altitude
Heat Stress Index
Density Altitude
Wind Chill

Features
Waterproof & Floats
Automatic & Manual Data Storage
Data Upload (with optional interface)
Customizable Data Storage - 2000 data points
Minimum, Maximum & Average Values
Backlit Display
Data Charting
Five Languages- English, French, Spanish, German & Italian
User-Replaceable Impeller
Flip-Top Impeller Cover

Features
Waterproof & Floats
Automatic & Manual Data Storage
Data Upload (with optional interface)
Customizable Data Storage - 2000 data points
Minimum, Maximum & Average Values
Backlit Display
Data Charting
Five Languages- English, French, Spanish, German & Italian
User-Replaceable Impeller
Flip-Top Impeller Cover

Includes
Soft Carry Pouch
Wrist & Neck Lanyards
Batteries - 2 AAA

Includes
Soft Carry Pouch
Wrist & Neck Lanyards
Batteries - 2 AAA

When the Kestrel 4100 was released in 2005, it was recognized for its excellence in product design in The News Magazine's second annual Dealer Design Awards. The 4100 was a bronze medal winner in the Testing and Monitoring Products Category.

I found the Kestrel Pocket Air Flow Tracker to be the perfect solution to taking the many measurements we often need. Having CFM with temperature and relative humidity in such a small package is great! I recently used it on one of my jobs to demonstrate that the air balance had not been done properly, confirming that this was the cause of the occupant's discomfort, not my control system. My name and reputation was cleared ... thank you Kestrel!
- Warren Wilber HVAC Professional, New Bern, NC

Kestrel 4500 & Kestrel Mounts
Kestrel 4500 Pocket Weather Tracker Kestrel Portable Vane Mount

For years our customers have been asking for wind direction along with wind speed. New for 2007, the Kestrel 4500 does just that with its built in digital compass. But it doesn't stop there. It also calculates crosswind and headwind/tailwind with reference to a user-set target heading, and stores the information along with all the other environmental readings in its 2000 data point memory.

Pair the 4500 with the Kestrel Vane Mount and you have a data-logging weather station that sets up in seconds and rotates in the slightest of breezes. Did we mention that the whole kit is the ultimate in portability? It packs down into a 2 x 6 inch pouch and weighs under 8 ounces.
The Kestrel 4500 is also available in the NV configuration.

Part No. 0845

Kestrel Portable Vane Mount
The Kestrel Portable Vane Mount is an ingeniously simple accessory designed for extreme light weight and portability.The Vane Mount assembles in seconds and the precision pivot and lightweight vane extension allows the unit to spin freely in the slightest of breezes.The incorporated level ensures that the Vane Mount is installed correctly and that direction readings will be accurate. Paired with the Kestrel's 2000 data-point memory log, extensive data can be collected including wind speed and direction.

 

Part No. 0791

Measurements
Heading (True & Magnetic)
Wind Direction
Crosswind
Headwind/Tailwind
Altitude
Pressure Trend
Barometric Pressure
Relative Humidity
Heat Stress Index
Dewpoint
Wet Bulb Temperature
Density Altitude
Wind Chill
Air Temperature
Water Temperature
Snow Temperature
Current Wind Speed
Average Wind Speed
Maximum Wind Gust

Kestrel Lightweight Monopod
The Kestrel Monopod is a support base for the Kestrel Vane Mount designed for users who require extreme light weight and compact size for their weather station. Four carbon fiber poles slip-fit together to extend to 6 feet (1.8 m),and sturdy parachute cord guy lines allow use of tent stakes, sand bags, rocks or other natural materials to create a strong and stable measurement platform. Adjustable top with standard 1/4-20 tripod mount makes it easy to reference the Vane Mount bubble level to fine-tune the setup and ensure accurate performance.
Packs down to 2 x 22 inches (5 x 56 cm) - nylon carry pouch included.

 

Part No. 0792

Features Waterproof & Floats
Automatic & Manual Data Storage
Data Upload (with optional interface)
Customizable Data Storage - 2000 data points
Minimum, Maximum & Average Values
Backlit Display
Data Charting
Five Languages- English, French, Spanish, German & Italian
User-Replaceable Impeller
Flip-Top Impeller Cover

Kestrel Portable Tripod
Clamp any Kestrel into this sturdy but lightweight tripod to take readings in the field. The tripod's legs extend to a maximum height of 10 inches (25.4 cm), and a minimum of 6 inches (15.25 cm). Ultra-compact and portable, it folds to just 7.5 inches (19 cm) and weighs 4.8 ounces (136 g). For further options, the top clamp detaches and is compatible with any tripod with a standard tripod mount. Or replace the clamp with the Kestrel Portable
Vane Mount for a small, lightweight, portable weather
station. Comes with a padded carry pouch.

Part No. 0807

Includes
Soft Carry Pouch
Wrist & Neck Lanyards
Batteries - 2 AAA

First responders use their Kestrel 4500 to gather the weather data they need within seconds of arriving at the scene. M/Cpl. Adam Ringle, from the Wilmington Police Department's Special Operations Division relies on his Kestrel 4500 to protect civilians in times of crisis-

'The Kestrel 4500 is an excellent, user friendly device that provides instant weather data to guide our Explosives Ordnance Disposal (EOD), HAZMAT, and crisis management teams rehabilitation efforts at various types of incidents. It is a 'must-have' for determining weather trends at long incidents!"

Kestrel PC Interface & Carrying Cases
Kestrel Interface Kestrel Carrying Case

Computer Interface for use with the Kestrel 4000 series models
With the addition of the Interface, any Kestrel 4000 series meter becomes a complete weather station and data logger. Data can be uploaded for long-term storage, in-depth analysis and detailed charting. It also has a tripod mount, allowing the Kestrel to be mounted for continuous data logging.
Simply connect the interface cable to your computer, rest the Kestrel on the cradle, and upload your stored data. The included software is easy to use, and saves the data in a comma delimited text file for use in a text editor, spreadsheet or database.
The provided software works with PC (Windows 3.0 or higher). The interface is available with either an RS-232 9-pin serial connector or a USB connector.

 

 

Kestrel 4000 Belt Clip Case
This sturdy padded nylon case lets you build a Kestrel 4000 Toolkit and still carry it on your belt with ease. The top flap features a hook/loop closure and
a special window designed to keep the Kestrel 4000 sensors continuously exposed to the outside air, ensuring accurate logged readings. The durable elastic loop on the side of the case is perfect for carrying a small flashlight or othertool. No need to find yourself in the field with dead batteries -- an elastic battery loop inside securely holds two backup AAA batteries.The front pocket is sized to carry either a Silva Baseplate Compass for determining wind direction, or the Kestrel mini Pad/Pen set for taking notes. Manufactured exclusively for NK by Nitelze™, this case features their patented J-hook belt clip made of sturdy nylon/fiberglass composite. This hook accommodates up to a 2 1/4" belt and also attaches reliably over a waistband. For complete flexibility, this case includes a strong hook/loop strap to allow for easy mounting on a backpack or harness strap. Available in black only.
Belt Clip Carry Case Part No. 0805

"I always take a Kestrel with me on all my expeditions. While gathering weather information on my Arctic Expedition to the Geographic North Pole, I was able to assist world renowned scientists in making predictions about the Arctic Ocean and the changing environment, especially with the Kestrel's interface abilities to evaluate large amounts of data. Kestrel provides me with the accurate information that I need to be successful in my objectives such - as climbing some of the highest peaks or skiing across the Arctic Ocean or Antarctica continent. "
- Doug Stoup, World Famous Mountaineer

Kestrel MOLLE Cases

Serial Interface Part No. 0804SER
USB Interface Part No. 0804USB

Kestrel Tactical MOLLE-Compatible Case
This case is designed for military personnel wishing to carry their Kestrel on a MOLLE/PALS mounting system. Manufactured exclusively for NK by Special Operations Technology in the USA of USA components, it features a padded 1000 denier DuPont® Cordura® Plus fabric body, a reinforced top flap, a 1" fastex buckle closure, and an inner pouch for spare AAA batteries. The mounting system is SOTech's unique MOLLE/PALS compatible secure fold/lock design with no hardware to break or rust. This mounting system also adapts for use on a belt up to 2 1/2" wide. Sized forthe Kestrel 4000 line, it will also hold a Kestrel 1 000 to 3500 series inside its slip-on cover. Available in Black, Coyote Brown (dark khaki) and Ranger Green (muted drab olive).

Black Part No. 0806BLK
Ranger Green Part No. 0806GRN
Coyote Brown Part No. 0806BRN

Kestrel Accessories
Kestrel RH Field Calibration KIt Replacement Impeller

RH Field Calibration Kit
To ensure the accuracy of Kestrel humidity measurements, we offer our RH Field Calibration Kit.The kit includes two salt solutions, salt bath jars with plastic grids (to keep the Kestrel clean), one water jar to stabilize temperature, and an insulated calibration case. Every Kestrel RH Meter features an easy-to-run self-calibration routine for use with this kit. The calibration chambers can also be used to verify unit accuracy. The kit can be used indefinitely, and salt refills can be purchased as required.
Part No. 0802

Replacement Impeller
Every Kestrel features a patented user-replaceable sapphire jewel bearing impeller. The Kestrel impeller is highly accurate and will take readings as low as 0.3 meters per second. After extensive use (approx. 400 hours), or use at speeds over 60 mph, the impeller's accuracy may be reduced slightly. This replacement impeller is necessary only when the original impeller is damaged or worn.
Part No. 0801

Accessory Compasses
Not ready to step up to the Kestrel 4500 yet? Simply hold the Kestrel into the wind and use a pocket compass to determine the wind direction.These quality compasses are also a convenient and inexpensive way to verify the accuracy of your Kestrel 4500 compass calibration before heading into the field.

Silva Starter 1-2-3 Compass Silva Wristband 340 Compass
Silva Starter™ 1-2-3 Compass
This compass has 2° graduation lines as well as large numerals at every 20° mark, and its clear base plate makes it easy to read a map and set bearings. To get a precise wind direction, simply point the large base plate arrow into the wind, turn the bezel to match the red North indicator to the red needle, and read the wind direction at the base plate arrow. This full-featured compass has sure-grip dial
and ergonomically-contoured base plate that includes inch and millimeter rules for mapping and plotting. Pair the Polaris with a Kestrel 4000 and our MilitaryfTactical case for an easy-to-carry complete weather analysis tool kit.
Silva Starter 1-2-3 Part No. 0808

Silva Wrist Band 340
This compass conveniently clips onto your Kestrel lanyard and is ideal for pairing with the 1000 to 3500 models. A sapphire bearing and a capsule designed to work on inclines gives you excellent accuracy and performance for such a small compass. A luminous dial is marked with a red arrow atthe north point.S,E,W points are marked by letters while the intercardinal points are marked with long lines at the 90° positions. For even more accurate calculations, the rotating bezel has 10° graduations and locking teeth. (Can also clip onto a watchband.)
Silva Wrist Band 340 Part No. 0809

Kestrel Tripod Kestrel Mount Options

Kestrel Portable Tripod
Clamp any Kestrel into this sturdy but lightweight tripod to take readings in the field. The tripod's legs extend to a maximum height of 10 inches (25.4 cm), and a minimum of 6 inches (15.25 cm). Ultra-compact and portable, it folds to just 7.5 inches (19 cm) and weighs 4.8 ounces (136 g). For further options, the top clamp detaches and is compatible with any tripod with a standard tripod mount. Or replace the clamp with the Kestrel Portable
Vane Mount for a small, lightweight, portable weather station. Comes with a padded carry pouch.
Part No. 0807

Kestrel Lightweight Monopod
The Kestrel Monopod is a support base for the Kestrel Vane Mount designed for users who require extreme light weight and compact size for their weather station. Four carbon fiber poles slip-fit together to extend to 6 feet (1.8 m),and sturdy parachute cord guy lines allow use of tent stakes, sand bags, rocks or other natural materials to create a strong and stable measurement platform. Adjustable top with standard 1/4-20 tripod mount makes it easy to reference the Vane Mount bubble level to fine-tune the setup and ensure accurate performance. Packs down to 2 x 22 inches (5 x 56 cm) - nylon carry pouch included.
Part No. 0792

Kestrel Features

At Nielsen-Kellerman, weather is serious business! We've been researching, designing, manufacturing and distributing our Kestrel Meters for 10 years. NK's founders and lead engineers, Richard Kellerman and Paul Nielsen, are determined to make the most accurate and reliable hand-held weather devices available.They have developed four patented measurement technologies for the Kestrel family and continue to research ways to improve the Kestrel line and create new products to meet their customers' needs.
While it may not be obvious when you look at a Kestrel side-by-side with a competitor's weather meter, there are very important differences that make Kestrel the best choice for almost every application.
Certified and Guaranteed Accuracy
Every single Kestrel manufactured at NK is calibrated for every single value, either directly against NIST­traceable standards or against an intermediary standard that is calibrated daily. (The National Institute of Standards and Technologies is the federal technology agency that works with industry to develop and apply technology, measurements, and standards.) Every unit is shipped with a FREE Certificate of Conformity that states what calibrations were performed, and the certified performance specifications. What does that mean for the customer? They can be absolutely sure that their weather readings are accurate to the stated specifications. Some competing weather instruments claim the same specifications as Kestrel, but only Kestrel certifies their accuracy. For an additional charge, NK can even provide a NIST-traceable Certificate of Calibration that specifies exactly which values were measured in each multi-point calibration, and details the calibrated standard used for testing. Our 30-day satisfaction guarantee covers accuracy concerns as well. If a customer questions their unit's accuracy after purchase, they can contact us and we'll double-check every calibration to verify the unit meets specifications.
US Manufacturing
The entire Kestrel line is designed and built in the USA - no other handheld weather meter is. Some electronic components have to be sourced overseas these days, but we buy American wherever we can. We believe US manufacture is the only way we can ensure that every Kestrel will do its job right, and we also believe it's important to do our part to keep manufacturing alive and well in the US.
Money-Back Guarantee
We have a 30-day satisfaction guarantee, and a 2-year warranty. Our track record speaks for itself - the return rate for the entire Kestrel line for any reason is 0.002%. Even after the regular warranty expires, we cover every Kestrel FOR LIFE with our Customer Care Warranty Program, which allows users to trade in a used or damaged Kestrel for a replacement one at about half price. And, if a customer ever has a problem or question about their Kestrel, they can come straight to us. From our Customer Service Representatives to the President of the company, we all answer the phone and know these products inside and out. If you have a problem, we'll fix it.
Patented Removable Impeller
The Kestrel impeller measures 1 inch across and turns on a Swiss precision pivot mounted on sapphire bearings. Its large size ensures accurate readings even if pointed off-angle from the wind, and its very low start-up speed allows measurement of the lightest puffs of wind. Units with smaller impellers simply can't match the Kestrel's performance. If damaged, a new calibrated impeller can be purchased for $19 and popped in without tools, restoring like-new performance. We designed and patented this removable impeller technology, and it keeps Kestrel Meters accurately measuring the wind speed for years.
Patented Dual Temperature Sensor RH Measurement
Relative humidity is tricky to measure - particularly in a sealed product. But, with wildland firefighters among our leading customers, we know it is essential that we get it right. Firefighters typically work in extreme conditions with very low humidity levels, and their lives literally depend on accurate readings. Accurate temperature measurement is critical to calculating relative humidity. That's why NK developed the patented Kestrel dual temperature sensor configuration. It is not necessary to wait the 20 to 40 minutes that would normally be required for the unit temperature to equilibrate to the air temperature after a temperature shift. As long as airflow over the temperature sensor is maintained, either by holding it into a breeze or waving it in the air, the external temperature sensor will provide instant and accurate readings of the outside air temperature, while the second sensor in the humidity chamber provides the critical information about the internal unit temperature (even if different). The Kestrel then performs the calculations necessary to yield relative humidity accuracy of +/- 3% RH from 5 to 95% (both impressive statistics usually only found in units costing hundreds of dollars more).The humidity sensor in the Kestrel has been selected for long-term stability and reliable performance even at very low and very high humidity conditions. Every Kestrel is calibrated against NIST-traceable standards,and can be recalibrated in the field with the Kestrel RH kit.
Patented Temperature Measurement
Unlike most watches and other products with a temperature measurement, the Kestrel sensor is outside the case to ensure it measures the air, not your hand or pocket. The "curls" serve to further isolate the temperature sensor from the effects of the case temperature. Again, simply wave the Kestrel back and forth a few times and you'll have accurate air temperature readings in seconds. And, since the Kestrel is completely waterproof, you can actually take water temperature and snow temperature readings ­simply submerge the sensor in the water or snow.Just ask the US Biathlon team - they used Kestrel 4000's in the 2006 Winter Olympics to measure air and snow temperature to determine the appropriate wax to use on their skis.
Pressure-Corrected Wet Bulb Temperature
Meters that provide wet bulb temperature readings without a pressure sensor assume standard atmospheric conditions, leading to highly inaccurate readings on low-pressure days, at high altitudes, or in any other "non-standard" situation. Kestrel meters only offer wet bulb temperature readings on our pressure-sensor equipped units, ensuring accuracy in all conditions.
Reliable Delta T
Delta T is a reading commonly used in dry climates to provide a quick guide to acceptable spraying conditions. It's the spread between the wet bulb temperature and the dry bulb temperature in ºC. For example, it is not recommended to apply pesticides when Delta T is above 10 - a range of 2 to 8 is ideal. With the new Kestrel 3500 Delta T, the calculation is done for you, accurately and simply. Because the wet/dry bulb spread can be quite small, even a small error in either temperature reading will generate a large percentage of error in Delta T.The Kestrel 3500 Delta T does correct for pressure, ensuring that Delta T is measured accurately. NK currently sells our Delta T model primarily in Australia, but if you are interested in learning more, please contact us.
Leak and Drop Testing
NK specifies IP-67 sealing for every Kestrel. This means that a Kestrel is totally protected from dust and can be submerged in water to 1 m (3ft) for up to 30 minutes without any leakage. To ensure that each Kestrel meets this standard, we subject each one to a vacuum leak test after final assembly. We've heard of one Kestrel product tester who sank it in a lake for a full day offishing, then pulled it out and put it back to work (that's dedication!) The appearance of Kestrel meters employed in underground coal mines is testimony to their dust-resistance.We have also drop-tested the Kestrel lineup to MIL-STD-81 OF (20 drops from 5' onto a hard surface.)
Field and Factory Recalibration
Not only is every Kestrel guaranteed accurate when it leaves the factory, but accuracy can be ensured by field and factory recalibration for years of reliable performance. Many highly technical applications require that measurement tools be recalibrated on a regular schedule. Relative humidity, wind, and barometric pressure measurements on each Kestrel can be calibrated in the field, no matter how old the Kestrel.To restore the wind speed calibration, the user need simply replace the impeller.To calibrate the relative humidity, the customer can employ the Kestrel Field Calibration Kit or send their unit back to us for factory recalibration. Recalibration of the barometric pressure is also possible so long as the user has a source of an accurate pressure reading. (Instructions are posted on our web site or the unit can be returned for factory calibration.) The only sensor that cannot be recalibrated is the temperature sensor, but in our 10 years of manufacturing Kestrels, we've never come across one that failed to meet specification, even after years of use.
Product Tune-Ups and Certification
If you would like to have your Kestrel checked for accuracy and restored to like-new performance, NK offers a Tune-up service that includes a new impeller, new batteries and full recalibration for a fraction of the original purchase cost. We also offer NIST-traceable Certificates of Calibration for industries that require it.

 
Customer Service & Tune Ups

While the Kestrel Meters are pretty neat "gadgets" the engineers who started NK know that they need to be reliable and accurate. Since the majority of users are utilizing their unit to make decisions about how to do their jobs safely and effectively, we believe that it's absolutely essential that their Kestrel Pocket Weather Meter is the most accurate hand-held weather instrument available. We also believe that a Kestrel Meter should last for a long time, and offer services to keep units reliable and accurate for years to come. Our Warranty and Lifetime Product Support policies were structured with these beliefs in mind.
Kestrel's 2- Year Warranty
NK does not believe in "disposable electronics." We know our products don't lead a pampered life,and we design them for years of performance in tough conditions. We guarantee every NK product to be free of defects in materials and workmanship for a period ofTWO YEARS from your date of purchase, and offer a 30-day satisfaction guarantee.
Lifetime Customer Care
After the regular warranty expires, NK covers every Kestrel FOR LIFE with our Customer Care Warranty Program, which allows users to trade in a used or damaged Kestrel for a new replacement at about half price.
Field Calibration
Kestrel Meters can be quickly recalibrated in the field, giving users confidence to rely on their Kestrel.To field calibrate the wind or air flow readings, simply replace the impeller with a new one. For relative humidity readings, use the RH Field Calibration Kit. For pressure sensor calibration, check our website or contact our Customer Service Department for instructions. The only sensor that cannot be field calibrated is the temperature sensor. The Kestrel's accurate temperature readings are due to NK's patented external thermistor, and over the 10+ years that we've been building Kestrels, we've never identified one that needed recalibration.
Tune-Up Services
Just like a car goes into the shop for an oil change and lube, we offer Tune-Ups for each Kestrel model.The unit will be cleaned, updated with a new impeller, batteries, battery door (if needed), and the readings verified to be within specification. Depending on the rnodel, some of the sensors are recalibrated. Once complete, the unit is leak tested, packed up and sent back to its owner, ready to go. Tune-up services are listed in the chart below:

1000 2000 2500 3000 3500, 4100, 4200, 4500

Clean and inspect
unit. Test sealing.
Install new calibrated
impeller and battery,
together with battery
door and/or battery
door o-ring as
needed. Issue new
Certificate of
Conformity with SN
of unit and impelier,
Date ofTest and
operator's initials.

Clean and inspect
unit. Test sealing and
temperature
response. Install new
calibrated impeller
and battery, together
with battery door
and/or battery door o·
ring as needed. Issue
new Certificate of
Conformity with SN
of unit and impeller,
Date ofTest and
operator's initials.

Clean and inspect
unit. Test sealing and
temperature
response. Recalibrate
pressure. Install new
calibrated impeller
and battery, together
with battery door
and/or battery door o·
ring as needed. Issue
new Certificate of
Conformity with SN
of unit and impeller,
Date of Test and
operator's initials.

Clean and inspect
unit. Test sealing and
temperature
response. Recalibrate
relative humidity.
Install new calibrated
impelier and battery,
together with battery
door and/or battery
door o-ring as
needed. Issue new
Certificate of
Conformity with SN
of unit and impeller,
Date ofTest and
operator's initials.

Clean and inspect unit.
Test sealing and
temperature response.
Recalibrate pressure and
relative humidity. Install
new calibrated impeller
and battery, together
with battery door and/or
battery door a-ring as
needed. Issue new
Certificate of Conformity
with SN of unit and
impelier, Date ofTest
and operator's initials.

• 10% discount for 10 or more tune-ups on one order.
• If unit does not pass leak-test, brief efforts will be made to reseal unit (sealant applied to leaking area, screws tightened.) Units that cannot pass leak test will be noted.
• If tune-up reveals a leak or function that cannot be restored to specifications, customer will be contacted. Options are:
a) pay a discounted rate for tune-up of remaining functions;
b) turn in unit for new unit at CCD rate (no charge for test tuneup);or
c) have unit returned without completing tune-up services (no charge to customer.)

Test & Calibration Services

All of our measurements are traceable to the National Institute of Standards and Technology, ensuring the highest level of reliability. Our prirnary Calibration Standards are sent for calibration in accordance with NIST requirements and based on a regular schedule. Only approved laboratories and NIST themselves are used for these calibration services.
Every Kestrel Pocket Weather Meter is individually calibrated and tested to be within specification at the time of rnanufacture as follows:

  1. Every wind impeller, including all replacernent irnpellers, is individually wind-tunnel tested against a tirne of flight ultrasonic anemometer calibrated by NIST.
  2. Every humidity-rneasuring instrurnent receives a two-point NIST-traceable calibration and is verified at a third interrnediate value against a factory-calibrated hygrometer.
  3. Temperature and pressure are functionally checked and verified against a NIST-traceable calibrated standard or reverified interrnediary standard.

For users who rnust ensure that their Kestrel is operating within specifications, we offer Factory Calibration and Certification services for any Kestrel. For many users, simple recalibration to original specifications, without certification or individual documentation, is sufficient. For users who require documentation, we also offer fully­documented NIST-traceable calibration services. Full before/after data is reported and shown on the calibration certificate. Instruments may be calibrated at the time of purchase or subsequently. See the chart below for the Test & Calibration Services offered by NK:

Test Only Wind Speed / Air Flow Temperature Relative Humidity Pressure
 

Verified in wind tunnel at
single speed. Standard and
measured values recorded
in R/A, together with
recommended action
(new impeller if out of
specification.) Test may
also be performed after
calibration at customer's
request - only one value to
be tested/recorded.

Verified against calibrated
standard (calibrated
Kestrel 4000 or digital
thermometer) at single
temperature. Standard
and measured values
recorded in R/A, together
with recommended action
(replacement if out of
specification.) Test may
also be performed after
calibration at customer's
request - only one value to
be tested/recorded.

Verified against calibrated
standard (calibrated
Kestrel 4000 or Edgetech)
after equilibration.
Standard and measured
values recorded in R/A,
together with
recommended action
(recalibration if out of
specification.) *Test may
also be performed after
calibration at customer's
request - only one value
to be tested/recorded.

Verified against calibrated
pressure standard
(calibrated Kestrel 4000 or
Mensor) at single
pressure. Standard and
measured values recorded
in R/A,together with
recommended action
(recalibration if out of
specification.) *Test may
also be performed after
calibration at customer's
request - only one value
to be tested/recorded.

Basic Calibration

New calibrated impeller
installed (calibrated at two
points). Certificate of Wind
Speed Conformity issued
with SN of unit, Date of
Test and operator's initials.

Standard new unit
calibration procedure
applied. Certificate of
Temperature Conformity
issued with SN of unit,
Date ofTest and operator's
initials.

Standard new unit
calibration procedure
applied. Certificate of
Relative Humidity
Conformity issued with SN
of unit, Date ofTest and
operator's initials.

Standard new unit
calibration procedure
applied. Certificate of
Pressure Conformity
issued with SN of unit,
Date ofTest and operator's
initials.

Test + Basic Calibration Perform both test & calibration services listed above Perform both test & calibration services listed above Perform both test & calibration services listed above Perform both test & calibration services listed above
NIST Calibration (w/full Certificate of Calibration)

Tested in wind tunnel
against NIST-calibrated
standard (Gil Anemometer)
at two points -low and high
speed. As found and as left
data recorded at both
points. New calibrated
impeller installed prior to as
left testing. Recommended
calibration interval provided
w/ calibration stickers.

Verified against NIST-
traceable digital
thermometer (Eutechnics
digital thermometer) at
two temperatures. As
found and as left data
recorded at both points.
Recommended calibration
interval provided w/
calibration stickers.

Verified against NIST-
traceable hygrometer
(Edgetech Dewprime) at
low and high humidity.As
found and as left data
recorded at both poi nts.
Recommended
calibration interval
provided w/ calibration stickers.

Verified against NIST·
traceable barometer
(Mensor) at two pressures.
Recalibrated to
specifications. As found
and as left data recorded
at both points.
Recommended calibration
interval provided w/
calibration stickers.

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