Triplett RHT37 Digital Psychrometer With Type K (-20 ~ 50°C, 1 ~ 99.9%RH)

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

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

Relative Humidity: 1 to 99.9%RH

Humidity Accuracy: ±3%RH (10 to 90%)

Type K Temperature: -328 to 2498°F (-200 to 1370°C)

Type K Accuracy: ±0.3%

Wet Bulb: -6.9 to 122°F (-21.6 to 50°C)

Dew Point: -109.7 to 122°F (-78.7 to 50°C)

Resolution: 0.1°F/°C; 0.1%RH

Power: 4 AAA Batteries

Dimensions: 9.0 x 2.2 x 1.7" (230 x 57 x 44mm)

Weight: 5.3oz (153g) 

Datasheet

Manual