Kestrel 5400 Heat Stress Tracker
The Kestrel 5400 provides 15 measurements in all including altitude, barometric pressure, density altitude, dew point temperature, globe temperature, heat stress index, naturally aspirated wet bulb temperature, relative humidity, station pressure (absolute pressure), temperature, thermal work limit (TWL), wet bulb temperature (Psychrometric), wet bulb globe temperature (WBGT), wind chill, and wind speed. The Kestrel 5400 features a large, high contrast screen, dual color backlight, scratch- and breakage-resistant window, corrosion-resistant battery compartment with secure door, intuitive user-interface, plus it tracks and logs over 10,000 sets of time-stamped data. Data log can be transferred to a mobile device wirelessly, or to a PC/MAC with the optional waterproof USB Data Transfer Cable (sold separately). Combine the Kestrel 5400 with a portable vane mount and portable tripod (each sold separately) for a data-logging weather station that rotates in even the slightest breeze and is ideal for short-term monitoring. This versatile, waterproof instrument floats, features an easy-to-read backlit display, and has an auto shutdown feature which activates after 15 minutes without a button press (feature can be disabled). Lanyard, protective pouch, lithium AA battery (average life 400 hours), certificate of conformity, and instruction manual are included. Five-year manufacturer’s warranty.
Wind Speed/Air Flow – Accuracy: Larger of 3% of reading, least significant digit or 20 ft/min. Resolution: 0.1 m/s; 1 ft/min; 0.1 km/h; 0.1 mph; 0.1 knots. Specification Range: 0.6 to 40.0 m/s; 118 to 7,874 ft/min; 2.2 to 144.0 km/h; 1.3 to 89.5 mph; 1.2 to 77.8 knots.
Ambient Temperature – Accuracy: 0.9 °F; 0.5 °C. Resolution: 0.1 °F; 0.1 °C. Specification Range: -20.0 to 158.0 °F; -29.0 to 70.0 °C.
Relative Humidity – Accuracy: ±2%RH. Resolution: 0.1%RH. Specification Range: 10 to 90% 25°C non-condensing.
Pressure – Accuracy: ±1.5 mbar at 25°C, 700-1100 mbar/ ±0.044inHg at 77°F 20.67- 32.48 inHg/ ±0.022 PSI 10.15-15.95 PSI. Resolution: 0.01 inHg; 0.1 hPa/mbar; 0.01 PSI. Specification Range: 25°C/77°F; 700-1100 mbar; 20.67-32.48 inHg; 10.15 - 15.95 PSI.
Compass – Accuracy: ±5°. Resolution: 1°; 1/16th Cardinal Scale. Specification Range: 0 to 360°.
Air Density – Accuracy: 0.0002 lb/ft3; 0.0033 kg/m3. Resolution: 0.001 lbs/ft3; 0.001 kg/m3. Sensors Employed: Temperature, Relative Humidity, and Pressure.
Air Flow – Accuracy: 6.71%. Resolution: 1 cfm; 1 m3/hr 1 m3/m 0.1m3/s 1 L/s. Sensors Employed: Air Flow, User Input (Duct Shape & Size).
Altitude – Accuracy: typical – 23.6 ft/7.2 m, - 750 to 1100 mBar; max – 48.2 ft/14.7 m – 300 to 750 mBar. Resolution: 1 ft; 1m. Sensors Employed: Pressure, User Input (Reference Pressure).
Barometric Pressure – Accuracy: 0.07 inHg; 2.4 hPa|mbar; 0.03 PSI. Resolution: 0.01 inHg; 0.1 hPa|mbar; 0.01 PSI. Sensors Employed: Pressure, User Input (Reference Altitude).
Crosswind & Headwind/ Tailwind – Accuracy: 7.1%. Resolution: 1 mph; 1 ft/min 0.1 km/h 0.1 m/s 0.1 knots. Sensors Employed: Wind Speed, Compass.
Delta T – Accuracy: 3.2 °F; 1.8 °C. Resolution: 0.1 °F; 0.1 °C. Sensors Employed: Temperature, Relative Humidity, Pressure.
Density – Altitude – Accuracy: 226 ft; 69 m. Resolution: 1 ft; 1m. Sensors Employed: Temperature, Relative Humidity, Pressure.
Dew Point – Accuracy: 3.4 °F; 1.9 °C; 15-95% RH. Refer to Range for Temperature Sensor. Resolution: 0.1 °F; 0.1 °C. Sensors Employed: Temperature, Relative Humidity.
Evaporation Rate – Accuracy: 0.01 lb/ft2/hr; 0.06 kg/m2/hr. Resolution: 0.01 b/ft2/hr; 0.01 kg/m2/hr. Sensors Employed: Wind Speed; Temperature Relative Humidity Pressure User Input (Concrete Temperature).
Heat Index – Accuracy: 7.1°F; 4.0°C. Resolution: 0.1 °F; 0.1 °C. Sensors Employed: Temperature, Relative Humidity.
Moisture Content/Humidity Ratio (“Grains”) –Accuracy: .3gpp .4g/kg. Resolution: 0.1 gpp; 0.01 g/kg. Sensors Employed: Temperature, Relative Humidity, Pressure.
Relative Air Density – Accuracy: 0.3%. Resolution: 0.1%. Sensors Employed: Temperature, Relative Humidity, Pressure.
Wet Bulb Temperature - Psychrometric – Accuracy: 3.2 °F; 1.8 °C. Resolution: 0.1 °F; 0.1 °C. Sensors Employed: Temperature, Relative Humidity, Pressure.
Wind Chill – Accuracy: 1.6 °F; 0.9 °C. Resolution: 0.1 °F; 0.1 °C. Sensors Employed: Wind Speed, Temperature.
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