The Kestrel 1000 is simple to use, compact, durable, waterproof and it floats!

The Kestrel 1000 Pocket Handheld Wind Speed Meter (Anemometer) measures current wind speed, average wind speed and maximum wind speed.

The Kestrel 1000 can be easily switched between mph, km/h, ft/min, m/s, knots and Beaufort. Every Kestrel Wind Meter includes a large 1" user replaceable impeller mounted on a sapphire jewel bearing which starts rotating with the slightest puff of air. If you require regular calibration, just replace the impeller with a new one and your Kestrel 1000 is restored to like new factory calibration standards. Every Kestrel Meter is waterproof and floats! Every Kestrel weather meter is made in the USA! For all of the features of the Kestrel 1000 plus temperature see the Kestrel 2000 Meter.

You're out in extreme temperatures. Guessing the conditions isn't good enough.

The Kestrel 2000 Meter's thermistor is located outside the case to ensure accurate measurement of temperature. Forget speculating, know exactly what the conditions are with the Kestrel 2000!

With the addition of a thermometer the Kestrel 2000 Meter incorporates all of the precision wind measurements of the Kestrel 1000 Meter and display's the temperature too!

Drop tested to military spec standards, the Kestrel 2000 Weather Meter is durable, waterproof and it floats. The waterproof Kestrel 2000 Meter reports not only air temperature with it's patented external temperature sensor but it can take accurate snow and water temperature as well. Since the temperature sensor is located outside of the case, you can take accurate temperature readings without contamination from your warm hand. The Kestrel 2000 Meter measures: Current Wind Speed, Maximum Wind Gust, Average Wind Speed, Air, Water & Snow Temperature and ind Chill.

NK's Kestrel 2000 meters have been used in the ESPN X Games, major golfing tournaments and have been used by the US Biathlon Olympic Team to measure air and snow temperature, aiding them in ski wax selection and downwind wind measurements.

By simply pressing two buttons, the Kestrel 2000 incorporates a unique hold function which can come in handy when taking measurements in areas where the display cannot be seen such as in ducts.

NK was the first to provide accurate relative humidity measurements from a hand-held weather meter, and the Kestrel 3000 features two patents on its humidity measuring sensors. A testament to the 3000s accuracy: its become practically required equipment for woodland firefighters whose lives literally depend on the accurate weather data their Kestrel 3000 provides.

From the Kestrel 3000s accurate relative humidity readings, it also calculates the dewpoint and heat stress index important which is information to know when working or playing outdoors in hot and humid conditions.

Kestrel Wind Meters are used by NFL Trainers to determine how frequently the athletes need to hydrate, and when the conditions are unhealthy for strenuous exercise. The Kestrel 3000 measures: Current Wind Speed, Maximum Wind Gust (speed), Average Wind Speed, Air, Water & Snow Temperature, Wind Chill, Relative Humidity, Heat Stress Index and Dewpoint Made in the USA!

If you are unsure of the model for you, please try our Interactive Kestrel Meter Selector Here

Tired of cumbersome equations to calculate CFM?

The Kestrel 4200 HVAC Meter has taken the calculations and guess-work out of air flow measurements with automatic air flow readings. The convenient averaging mode ensures accurate CFM readings in any airflow or duct size and shape. For immediate and accurate air flow readings, simply:

1. Enter the duct shape and dimensions.
2. Hold the 4200 in the air flow.
3. Volume air flow readings are displayed... no calculator required!

Innovative Design and Features

The Kestrel 4200 makes HVAC technicians jobs even easier with automatic wet bulb temperature and humidity ratio readings. Of particular interest to dehumidification professionals. The Kestrel 4200 measures relative humidity, dewpoint, wet bulb temperature and heat stress index as well as the humidity ratioand the patented dual chamber humidity sensor assures fast and accurate readings in any environment. This multi-functional precision instrument also measures: volume air flow, air velocity, barometric pressure, altitude, wind chill, heat stress index, temperature, relative humidity and dewpoint, either ambient or in any accessible airflow.

Easy-to-Use Data Logging & Computer Upload The Kestrel 4200 air flow meter features a powerful data logger that records 1600 sets of measurements at user-selectable time intervals (over 2 years of data can be recorded). Logged data can be reviewed with the 4200s on-screen graphing capabilities, or uploaded to a PC for in-depth review. The optional Kestrel Interface and accompanying Kestrel Communicator software makes long-term storage, in-depth analysis and detailed charting of stored data a breeze. With on-screen customization, the 4200 can truly be personalized for every technician. Easy set-up screens allow the unit to display only relevant readings, and hide screens not related to the job. Plus the Kestrels user screens group pertinent information on one easily referenced screen.

NIST-Traceable Accuracy

Dont let the inexpensive price tag fool you the Kestrel 4200 is as accurate as instruments costing far more. Every Kestrel is individually calibrated to NIST-traceable standards and comes with a free Certificate of Conformity. (Individual NIST certificates and recalibration are also available.) Consider the 4200s hold and averaging functions, and its the only instrument HVAC technicians need to perform a variety of jobs. Manufactured in the USA!

If you are unsure of the model for you, please try our Interactive Kestrel Meter Selector Here

For years NK's customers have been asking for wind direction along with wind speed. The Kestrel 4500 wind and weather meter 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 1400 data point memory.

Pair the Kestrel 4500 wind and weather Meter 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.

Available in the NV Configuration

Military personnel and pilots flying in darkness are often concerned with preserving their night vision. Due to overwhelming demand from our military customers, the Kesrel NV line was added in 2005.

The Kestrel 4000NV is available with an Olive Drab case or a Desert Tan case. The unit has a night-vision preserving backlight which helps users to sustain natural night vision. The NV's backlight incorporates an optical filter to reduce overall brightness and minimize blue and green spectrum light to preserve night vision. Additionally, NV backlights are also much dimmer than a standard backlight, making it more difficult to detect with the naked eye in night operations. This backlight appears soft greyish pink, not red, and is still in the visible spectrum, so is not compatible with night-vision equipment.

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. Manufactured in the USA!

Article: 4500 and Crop Spraying

Kestrel 4500 Manual - English

If you are unsure of the model for you, please try our Interactive Kestrel Meter Selector Here

Free Download | HKGunLoader Kestrel Horus Gun File Software (access to Horus' library of nearly 1000 guns and loads) for use with Kestrel 4500NV Horus Meters

Kestrel Pocket Weather Meters and Horus Vision have partnered to provide a powerful shooting tool that combines the critical environmental data and targeting software solutions required for precision shooting -- all in one four-ounce pocket-sized unit. Previously, shooters would need to obtain environmental data from a Kestrel meter and then input that data into a PDA loaded with Horus ATrag ballistics software. Now, the Kestrel Ballistics Weather Tracker with Horus ATrag Software contains all of the necessary data and solutions in one device to minimize user workload and distraction. Plus, the Kestrel meter is IP67 waterproof and MIL-STD-810F rugged, allowing users to avoid the expense and weight of a ruggedized PDA.

The new unit allows users to load and customize multiple guns and rounds from the extensive proprietary Horus database. Simple, intuitive screens allow the user to create up to six targets customized for location, distance, direction, declination and winds. The Kestrel meter's highly accurate measuring and averaging of wind and digital compass for target bearing and wind direction assists in defining the target winds. Once these parameters are set, the Kestrel meter takes over - tracking the current met data and automatically updating the firing solution using Horus ATrag advanced proprietary algorithms and taking coriolis and spin drift into account. No additional user input is required.

Crosswind strongly influences the accuracy of sharp shooting, becoming the largest error component at long ranges. Even medium crosswind velocities (~5 m/s) along the flight path of a bullet can cause 1-meter deviations at 500 meters. The Kestrel 4500 automatically calculates the crosswind, as well as measures the other environmental factors that play into ballistics performance - temperature, humidity and density altitude. Simply plug the Kestrel's weather data into any ballistics software to calculate accurate windage adjustments. It's no wonder the Kestrel is consistently on the military sniper's "most wanted" list of desired equipment.

Military personnel and pilots flying in darkness are often concerned with preserving their night vision. Due to overwhelming demand from our military customers, the Kesrel NV line was added in 2005.

The Kestrel 4500NV is available with an Olive Drab case or a Desert Tan case. The unit has a night-vision preserving backlight which helps users to sustain natural night vision. The NV's backlight incorporates an optical filter to reduce overall brightness and minimize blue and green spectrum light to preserve night vision. Additionally, NV backlights are also much dimmer than a standard backlight, making it more difficult to detect with the naked eye in night operations. This backlight appears soft greyish pink, not red, and is still in the visible spectrum, so is not compatible with night-vision equipment.

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.

How does the Kestrel 4500's crosswind calculator work?
The 4500 features a built-in digital compass that allows you to measure the wind speed and direction.

In order to display the crosswind, simply point the Kestrel down the runway or target and set the
reference heading. Then hold the 4500 into the wind and it automatically calculates the crosswind with respect to the reference heading. It also calculates the headwind/tailwind the same way (headwinds are positive values and tailwinds are negative).

What's so great about the Kestrel 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. If damaged, a new calibrated impeller can be purchased for $19 and popped in without tools, restoring like-new performance.

Can the Kestrel 4000 communicate directly with a PDA or computer?
No. Due to the rapidly changing standards for product communication, data upload is presently limited to a USB or serial interface to communicate with a PC. Additional communication options may be developed in the future as a predominant standard emerges among Kestrel users.

What's that curly looking thing?
That's the patented Kestrel temperature sensor. Unlike most watches and other products with
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.

How does the Kestrel measure humidity so accurately?
The Kestrel features a patented dual temperature sensor configuration for rapid response and accurate measurement. Every Kestrel is calibrated against NIST-traceable standards, and can be recalibrated in the field with the Kestrel RH kit.

How does the Kestrel measure altitude?
The Kestrel uses an atmospheric pressure sensor and calculates altitude based on a standard
atmosphere. This is just like the altimeter in an airplane, or an altimeter watch. It's more accurate than a GPS altimeter, but does require periodic reset of the reference pressure to eliminate weather effects.

How does the altimeter work? Is the reference pressure the same as an altimeter setting?
The Kestrel models with altimeter calculate altitude from barometric pressure in exactly the same
manner and according to the same rules as an aircraft altimeter. The "reference pressure" on the
Altitude screen is the same as the altimeter setting obtained from a local airfield.

Can the Kestrel provide location?
Currently we do not offer a Kestrel with GPS. We may add basic GPS location to a future Kestrel model, but we'll leave the full-blown mapping and navigation to the companies that specialize in GPS as much as we specialize in weather.

Do you really mean MADE in the USA?
Yes. The entire Kestrel line is designed and built in the USA. Some electronic components have to be sourced overseas these days, but we buy American wherever we can.

Who do I call if I have a problem?
You can call Nielsen-Kellerman direct! Weather it's their Customer Service Representatives to the President of the company, they all answer the phone and know their products inside and out. If you have a problem, they'll fix it. Kestrels hardly ever break, but if they do, they're covered by a 5-year warranty.

If you are unsure of the model for you, please try our Interactive Kestrel Meter Selector Here

Pair the Kestrel 4500 Wind Meter with the Kestrel Meter 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.

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 doesnt 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 1400 data point memory.

Pair the 4500 Wind Meter 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.

Available in the NV Configuration

Military personnel and pilots flying in darkness are often concerned with preserving their night vision. Due to overwhelming demand from our military customers, the Kesrel NV line was added in 2005.

The Kestrel 4000NV is available with an Olive Drab case or a Desert Tan case. The unit has a night-vision preserving backlight which helps users to sustain natural night vision. The NV's backlight incorporates an optical filter to reduce overall brightness and minimize blue and green spectrum light to preserve night vision. Additionally, NV backlights are also much dimmer than a standard backlight, making it more difficult to detect with the naked eye in night operations. This backlight appears soft greyish pink, not red, and is still in the visible spectrum, so is not compatible with night-vision equipment.

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. Manufactured in the USA!

If you are unsure of the model for you, please try our Interactive Kestrel Meter Selector Here

(1) Kestrel Rotating Vane Mount - 0791
(1) Kestrel Replacement Impeller

Free Download | HKGunLoader Kestrel Horus Gun File Software (access to Horus' library of nearly 1000 guns and loads) for use with Kestrel 4500NV Horus Meters

Our Kestrel Horus Meters include the latest Issue 4.61. software. Kestrel Horus Meters with Issue 4.61 are upgradeable while earlier Issue 3.xx versions are not. If future upgrades are made available, the unit would need to be returned as the upgrade is performed at the manufacturer.

New! This Kestrel Includes Bluetooth Wireless Technology!
Kestrel's reputation for accuracy and reliability has been earned over thirteen years of proven performance in extreme environments. In many instances, the key environmental measurements from a Kestrel instrument are input into other systems ballistics calculators, fire behavior models, hazmat plume predictors, heat stress models, weather reports, research data sets and more. Now, both real-time and logged data can be transferred wirelessly and automatically to a laptop or PDA, making a Kestrel 4000 series weather meter the perfect tool for virtually any job that requires quick and truly accurate environmental data.

Available in the NV Configuration

Crosswind strongly influences the accuracy of sharp shooting, becoming the largest error component at long ranges. Even medium crosswind velocities (~5 m/s) along the flight path of a bullet can cause 1-meter deviations at 500 meters. The Kestrel 4500 automatically calculates the crosswind, as well as measures the other environmental factors that play into ballistics performance - temperature, humidity and density altitude. Simply plug the Kestrel's weather data into any ballistics software to calculate accurate windage adjustments. It's no wonder the Kestrel is consistently on the military sniper's "most wanted" list of desired equipment.

Military personnel and pilots flying in darkness are often concerned with preserving their night vision. Due to overwhelming demand from our military customers, the Kesrel NV line was added in 2005.

The Kestrel 4500NV is available with an Olive Drab case or a Desert Tan case. The unit has a night-vision preserving backlight which helps users to sustain natural night vision. The NV's backlight incorporates an optical filter to reduce overall brightness and minimize blue and green spectrum light to preserve night vision. Additionally, NV backlights are also much dimmer than a standard backlight, making it more difficult to detect with the naked eye in night operations. This backlight appears soft greyish pink, not red, and is still in the visible spectrum, so is not compatible with night-vision equipment.

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.

How does the Kestrel 4500's crosswind calculator work?
The 4500 features a built-in digital compass that allows you to measure the wind speed and direction.

In order to display the crosswind, simply point the Kestrel down the runway or target and set the
reference heading. Then hold the 4500 into the wind and it automatically calculates the crosswind with respect to the reference heading. It also calculates the headwind/tailwind the same way (headwinds are positive values and tailwinds are negative).

What's so great about the Kestrel 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. If damaged, a new calibrated impeller can be purchased for $19 and popped in without tools, restoring like-new performance.

That's the patented Kestrel temperature sensor. Unlike most watches and other products with
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.

How does the Kestrel measure humidity so accurately?
The Kestrel features a patented dual temperature sensor configuration for rapid response and accurate measurement. Every Kestrel is calibrated against NIST-traceable standards, and can be recalibrated in the field with the Kestrel RH kit.

How does the Kestrel measure altitude?
The Kestrel uses an atmospheric pressure sensor and calculates altitude based on a standard
atmosphere. This is just like the altimeter in an airplane, or an altimeter watch. It's more accurate than a GPS altimeter, but does require periodic reset of the reference pressure to eliminate weather effects.

How does the altimeter work? Is the reference pressure the same as an altimeter setting?
The Kestrel models with altimeter calculate altitude from barometric pressure in exactly the same
manner and according to the same rules as an aircraft altimeter. The "reference pressure" on the
Altitude screen is the same as the altimeter setting obtained from a local airfield.

Can the Kestrel provide location?
Currently we do not offer a Kestrel with GPS. We may add basic GPS location to a future Kestrel model, but we'll leave the full-blown mapping and navigation to the companies that specialize in GPS as much as we specialize in weather.

Do you really mean MADE in the USA?
Yes. The entire Kestrel line is designed and built in the USA. Some electronic components have to be sourced overseas these days, but we buy American wherever we can.

Who do I call if I have a problem?
You can call Nielsen-Kellerman direct! Weather it's their Customer Service Representatives to the President of the company, they all answer the phone and know their products inside and out. If you have a problem, they'll fix it. Kestrels hardly ever break, but if they do, they're covered by a 5-year warranty.

If you are unsure of the model for you, please try our Interactive Kestrel Meter Selector Here

Pair the 4500 Wind Meter 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.

Available in the NV Configuration

Military personnel and pilots flying in darkness are often concerned with preserving their night vision. Due to overwhelming demand from our military customers, the Kesrel NV line was added in 2005.

The Kestrel 4500NV is available with an Olive Drab case or a Desert Tan case. The unit has a night-vision preserving backlight which helps users to sustain natural night vision. The NV's backlight incorporates an optical filter to reduce overall brightness and minimize blue and green spectrum light to preserve night vision. Additionally, NV backlights are also much dimmer than a standard backlight, making it more difficult to detect with the naked eye in night operations. This backlight appears soft greyish pink, not red, and is still in the visible spectrum, so is not compatible with night-vision equipment.

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. Manufactured in the USA!

If you are unsure of the model for you, please try our Interactive Kestrel Meter Selector Here

You asked for it - We listened! This AllKestrel.com Kestrel 4500 Meter bundle deal is all you will need to take accurate wind and weather measurements in one very compact package. As a matter of fact, this Kestrel 4500 bundle kit will fit in one of our smallest shipping boxes (7 x 7 x 6) with room to spare.

Pair the 4500 Wind Meter 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.

Available in the NV Configuration

Military personnel and pilots flying in darkness are often concerned with preserving their night vision. Due to overwhelming demand from our military customers, the Kesrel NV line was added in 2005.

The Kestrel 4000NV is available with an Olive Drab case or a Desert Tan case. The unit has a night-vision preserving backlight which helps users to sustain natural night vision. The NV's backlight incorporates an optical filter to reduce overall brightness and minimize blue and green spectrum light to preserve night vision. Additionally, NV backlights are also much dimmer than a standard backlight, making it more difficult to detect with the naked eye in night operations. This backlight appears soft greyish pink, not red, and is still in the visible spectrum, so is not compatible with night-vision equipment.

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. Manufactured in the USA!

Article: 4500 & Agricultural Spraying (PDF)

If you are unsure of the model for you, please try our Interactive Kestrel Meter Selector Here

Kestrel Pocket Weather Meters and Horus Vision have partnered to provide a powerful shooting tool that combines the critical environmental data and targeting software solutions required for precision shooting -- all in one four-ounce pocket-sized unit. Previously, shooters would need to obtain environmental data from a Kestrel meter and then input that data into a PDA loaded with Horus ATrag ballistics software. Now, the Kestrel Ballistics Weather Tracker with Horus ATrag Software contains all of the necessary data and solutions in one device to minimize user workload and distraction. Plus, the Kestrel meter is IP67 waterproof and MIL-STD-810F rugged, allowing users to avoid the expense and weight of a ruggedized PDA. The new unit allows users to load and customize multiple guns and rounds from the extensive proprietary Horus database. Simple, intuitive screens allow the user to create up to six targets customized for location, distance, direction, declination and winds. The Kestrel meter's highly accurate measuring and averaging of wind and digital compass for target bearing and wind direction assists in defining the target winds. Once these parameters are set, the Kestrel meter takes over - tracking the current met data and automatically updating the firing solution using Horus ATrag advanced proprietary algorithms and taking coriolis and spin drift into account. No additional user input is required.

Free Download | HKGunLoader Kestrel Horus Gun File Software (access to Horus' library of nearly 1000 guns and loads) for use with Kestrel 4500NV Horus Meters

If you are unsure of the model for you, please try our Interactive Kestrel Meter Selector Here

• Windshield, Dashboard, and Console Mount
• Adjustable Holder fits 4000 / 4200 / 4300 and 4500 Meters
• Easy to install
• Alcohol Wipe Included
  
• No tools required

The Blue Ocean megaphone crosses uncharted waters in durability and rugged reliability.

Uniquely designed and carefully built to defy the severe environmental elements that commonly ruin other megaphones: corrosion, cracking, breaking, water damage. Plus, the long-lasting rechargeable battery means you never have to replace multiple expensive batteries again!

Human Heat Illness is Dangerous, Deadly and on the Rise!

Athlete deaths from heat exposure are on the rise. Warming summers have been accompanied by weekly reports of athletes young and old collapsing from severe heat-induced illness. Our military training units struggle to keep soldiers healthy while preparing them for the grueling heat of Iraq and Afghanistan.OSHA is campaigning to prevent heat illness in outdoor workers and reports that every year thousands of workers become sick working in the heat, and some even die. In every instance, accurate and localized measurement of heat stress conditions is a key component of a heat illness prevention plan. The Kestrel 4400 Heat Stress Tracker, new from NK, answers this need.

Human heat stress results from a combination of many environmental factors – air temperature and humidity along with radiant heat from the sun and surfaces, balanced by the cooling effect of breezes or air flow. Anyone who has stood under welcome shade adjacent to a sizzling parking lot understands that these conditions must be evaluated exactly where peoples’ activities are taking place. The most common composite measurement used to determine appropriate exposure to heat stress conditions is Wet Bulb Globe Temperature or “WBGT.” The American College of Sports Medicine, the American Conference of Governmental Industrial Hygienists, and the US Military all have published threshold limit values (TLV’s) or reference guidelines for conditions, activity levels and hydration based on WBGT, clothing levels and acclimatization of participants.

The Kestrel 4400 Heat Stress Tracker Provides Waterless WBGT Measurement

Until now, most accurate WBGT measurement tools were large, cumbersome to use (requiring the transport of distilled water along with the measurement unit) and/or expensive. NK added a compact black globe thermometer to the already proven sensor suite of the Kestrel 4000 Pocket Weather Tracker, then built in advanced algorithms to calculate WBGT values within 2.18 deg C of the values obtained from a full-sized WBGT setup. The Kestrel 4400 Pocket Heat Stress Tracker fits in a pocket or small Kestrel Belt Carry Case and provides accurate waterless WBGT measurements within minutes of exposure to the air.

TWL and Other Key Measurements

The Kestrel 4400 also displays thermal work limit (“TWL”), another recognized composite heat stress prediction tool. For both WBGT and TWL, the Kestrel 4400 provides on-screen alarms when conditions enter the caution and danger zones, providing clear and immediate guidance that heat illness prevention steps must be taken. Clothing levels can also be customized, making the Kestrel 4400 particularly useful in activities requiring heavy protective gear which worsens heat stress. The Kestrel 4400 also displays natural wet bulb temperature, black globe temperature, and mean radiant temperature (“MRT”).

Kestrel 4400 Options and Accessories

The Kestrel Vane Mount accessory allows you to mount the Kestrel 4400 Heat Stress Tracker on a tripod for longer-term monitoring and logging of heat stress conditions. Optional Bluetooth® wireless data transfer enables transfer of the logged conditions to a computer or smart phone for later documentation.

Kestrel 4400 Measures Wet Bulb Globe Temperature (WBGT) Thermal Work Limit (TWL) Globe Temperature Naturally Aspirated Wet Bulb Temperature Mean Radiant Temperature (MRT) Wind Speed Max Wind Gust Average Wind Speed Temperature Wind Chill Relative Humidity Heat Stress Index Dew Point Temperature Wet Bulb Temperature Barometric Pressure Altitude Density Altitude Pressure Trend Time and date Kestrel 4400 Includes Protective transport case Kestrel Vane Mount Batteries - 2 AAA Kestrel Certificate of Conformity

Kestrel 4400 Features Waterproof (IP-67 standard) and floats Easy-to-read backlit display Minimum, Maximum and Average values for every measurement Data Logger (automatic and manual) stores, recalls and graphs data sets Customizable data storage intervals Customized user screens group key measurements Patented external temperature and humidity sensors for fast and accurate readings Stable humidity sensor rarely requires recalibration – factory calibration available if required Patented “no-tools replaceable” wide-range air flow impeller – replacement restores factory calibration Flip-top impeller cover allows use of other functions while protecting the impeller Upload to a computer with optional interface Five languages (English, French, Spanish, German, and Italian) [VERIFY] US Patent Nos. 5,783,753 and 5,939,645 and 6,257,074 5-year Warranty Manufactured in the USA from US and imported components

Brand New for 2012! Introducing the revolutionary Kestrel 4400 Heat Stress Tracker!

Includes a Kestrel Vane Mount!

Human Heat Illness is Dangerous, Deadly and on the Rise!

Athlete deaths from heat exposure are on the rise. Warming summers have been accompanied by weekly reports of athletes young and old collapsing from severe heat-induced illness. Our military training units struggle to keep soldiers healthy while preparing them for the grueling heat of Iraq and Afghanistan.OSHA is campaigning to prevent heat illness in outdoor workers and reports that every year thousands of workers become sick working in the heat, and some even die. In every instance, accurate and localized measurement of heat stress conditions is a key component of a heat illness prevention plan. The Kestrel 4400 Heat Stress Tracker, new from NK, answers this need.

Human heat stress results from a combination of many environmental factors – air temperature and humidity along with radiant heat from the sun and surfaces, balanced by the cooling effect of breezes or air flow. Anyone who has stood under welcome shade adjacent to a sizzling parking lot understands that these conditions must be evaluated exactly where peoples’ activities are taking place. The most common composite measurement used to determine appropriate exposure to heat stress conditions is Wet Bulb Globe Temperature or “WBGT.” The American College of Sports Medicine, the American Conference of Governmental Industrial Hygienists, and the US Military all have published threshold limit values (TLV’s) or reference guidelines for conditions, activity levels and hydration based on WBGT, clothing levels and acclimatization of participants.

The Kestrel 4400 Heat Stress Tracker Provides Waterless WBGT Measurement

Until now, most accurate WBGT measurement tools were large, cumbersome to use (requiring the transport of distilled water along with the measurement unit) and/or expensive. NK added a compact black globe thermometer to the already proven sensor suite of the Kestrel 4000 Pocket Weather Tracker, then built in advanced algorithms to calculate WBGT values within 2.18 deg C of the values obtained from a full-sized WBGT setup. The Kestrel 4400 Pocket Heat Stress Tracker fits in a pocket or small Kestrel Belt Carry Case and provides accurate waterless WBGT measurements within minutes of exposure to the air.

TWL and Other Key Measurements

The Kestrel 4400 also displays thermal work limit (“TWL”), another recognized composite heat stress prediction tool. For both WBGT and TWL, the Kestrel 4400 provides on-screen alarms when conditions enter the caution and danger zones, providing clear and immediate guidance that heat illness prevention steps must be taken. Clothing levels can also be customized, making the Kestrel 4400 particularly useful in activities requiring heavy protective gear which worsens heat stress. The Kestrel 4400 also displays natural wet bulb temperature, black globe temperature, and mean radiant temperature (“MRT”).

Kestrel 4400 Options and Accessories

The Kestrel Vane Mount accessory allows you to mount the Kestrel 4400 Heat Stress Tracker on a tripod for longer-term monitoring and logging of heat stress conditions. Optional Bluetooth® wireless data transfer enables transfer of the logged conditions to a computer or smart phone for later documentation.

Since the 4400 Heat Stress Tracker is so new, the complete manual is still in production. Here is a brief 2 page manual of some of the more critical features: Kestrel 4400 Heat Stress Tracker Quick Guide Manual (PDF)

The Bear Grylls Basic Survival Kit includes the basics to get you through a tough situation

• Waterproof Bag
• Gerber® Mini-Paraframe™ Knife
• Emergency Whistle
• Fire Starter
• Waterproof Matches
• Snare Wire
• Emergency Cord
• Cotton Ball - Fire Tinder
• Lightweight, ripstop nylon bag with waterproof zipper
• Land to air rescue instructions
• Priorities of Survival - Pocket guide contains Bear’s survival essentials