Kestrel^® 5500FW Fire Weather Meter Pro

SENSORS 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°. CALCULATED MEASUREMENTS 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. Probability of Ignition (PIG) – Accuracy: Max, 10%PIG, Accuracy dependent on proximity to reference table threshold. Resolution: 10%PIG. Sensors Employed: Temperature, Relative Humidity. 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.