Triplett RHT32-NIST Hygro-Thermometer Psychrometer (-20 ~ 50°C, 1 ~ 99.9%RH; With Cert of Traceability to N.I.S.T)

Air Temperature: -4 to 122°F (-20 to 50°C)

Accuracy (Air Temperature): ±1.8°F / 1°C

Relative Humidity: 1 to 99.9%RH

Accuracy (Humidity): ±3%RH (10 to 90%)

Wet Bulb: -6.8 to 122°F (-21.6 to 50°C)

Dew Point: -109.6 to 122°F (-78.7 to 50°C)

Resolution: 0.1°F/°C; 0.1%RH

Power: 2 AAA Batteries

Dimensions: 7 x 2 x 1" (178.5 x 48.4 x 24.7mm)

Weight: 3.4oz (95g)

Datasheet

Manual