Ambient Weather WS-HT350 Fast Response Air Thermo-Hygrometer with Wet Bulb Psychrometer, Dew Point Meter
Specifications:Temperature:Range: -22 to 199 °F (-30 to 100 °C)Accuracy:  0.9 °F ( 0.5 °C) at 25°C,  1.5 °F ( 0.8 °C) otherwiseResolution: 0.01 °F / °CHumidity:Range: 0 to 100%Accuracy:  2% from 20 to 80% at 25°C,  2.5% otherwiseResolution: 0.01%Other Specifications:Dimensions: 8.75 x 2.5 x 1.75"Display Dimensions: 1.5" x 1.5" (38.1 mm x 38.1 mm)Sensor Type: Relative humidity and temperature multi sensor module located at the probe tip with calibrated digital outputResponse Time: %RH: 10 seconds for stabilization in still air, temperature < 0.4 secondsSampling Rate: 0.4 secondsOut of range: "OL" indication on the displayLow battery indication: The icon is displayed when the battery voltage drops below the operating level.Operating Conditions: 32 °F to 104 °F (0 °C to 40°C); < 80% RH non-condensingStorage Conditions: 14 °F to 140 °F (-10 °C to 60°°C); <80% RH non-condensing Auto Power Off: Meter automatically shuts down after.15 minutes of inactivity (Sleep Mode)Power: One standard 9V, NEDA1604 or 6F22 battery (included).Dimensions: 8.8 (H) x 1.8 (W) x 1.3 (D) or 225 (H) x 45 (W) x 34 (D) mmWeight: 0.45 lbs (200g)Certification: FCC and CE.