Kestrel 4400 thermal stress tracker provides waterless WBGT measurement
So far, the vast majority of WBGT precision measurement tools are bulky, cumbersome to operate (requiring distilled water), and expensive. On the basis of NK4000, NK4400 adds a compact black sphere thermometer and calculates the value of WBGT. The NK4400 handheld thermal stress tracker can be placed in a pocket and is very portable. It can obtain accurate waterless WBGT measurement data after being exposed to air for a few minutes.

TWL and other major measurement parameters
NK4400 can display the heating limit value (TWL value) and can also identify composite thermal stress prediction tools. For WBGT and TWL, NK4400 provides alarm display, as well as clearing records and hedging guidance. The casing can also be customized, making the heavy protective equipment required for NK4400 particularly useful in harsh thermal stress environments. NK4400 also displays wet bulb temperature, black bulb temperature, and mean radiant temperature (MRT)

NK4400 measurement parameters:
Wet bulb temperature (WBGT)
● Heating limit value (TWL)
Global temperature
● Naturally aspirated wet bulb temperature
● Mean Radiated Temperature (MRT)
● Wind speed
● Maximum wind speed
● Average wind speed
● Air temperature
● Wind cold
● Relative humidity
● Heat index
Dew point temperature
● Wet bulb temperature
● Atmospheric pressure
● Altitude
● Density height

Product features:
Waterproof rating IP67, floating on water surface
● Backlight display
Measure the maximum, minimum, and average values of the parameters
● Data recording, storage, export, and configuration
● Custom storage interval
● Custom display interface
● External temperature and humidity sensors
Stable humidity sensors almost do not require recalibration - if necessary, they can be sent back to the factory for calibration
● replaceable impeller - restore factory calibration accuracy after replacement
The impeller cover can protect the impeller
● Optional data module or Bluetooth, data transmission to computer
● Five languages (English, French, Spanish, German, and Italian)

Standard configuration:
● Carry a soft bag
● Strap rope
● 2 AAA batteries
● Quality certificate

Optional accessories:
● Fixed rotating wind vane
Kestrel Foldable Tripod
● Data module
Mini tripod
● replaceable impeller
● Portable bag