Measuring range of temperature	-20 ... 70°C / -4 ... 158°F
Measuring range of relative humidity (RH)	0 ... 100% RH
Measuring range of dew point temperature	20 ... 70°C / -4 ... 158°F
Measuring range of wet bulb temperature	20 ... 70°C / -4 ... 158°F
Measuring accuracy of temperature	± 1.0°C / 1.8°F
Measuring accuracy of relative humidity	45 ... 75%: ± 3.0% RH, otherwise: ± 4.5% RH
Measuring accuracy of dew point temperature	± 1.5°C / 2.7°F at 25°C / 77°F, 40 ... 70% RH
Measuring accuracy of wet bulb temperature	± 1.5°C / 2.7°F
Resolution of temperature	0.1°C / 0.18°F
Resolution of relative humidity	0.1% RH
Resolution of dew point temperature	0.1°C / 0.18°F
Resolution of wet bulb temperature	0.1°C / 0.18°F
Automatic shutdown	After 15 minutes of inactivity (can be disabled)
Operating temperature	-20 ... 60°C / -4 ... 140°F
Storage temperature	-20 ... 60°C / -4 ... 140°F
Power supply	3 x 1.5V AAA batteries
Battery life	Approx. 50 hours of continuous use at full charge
Dimensions	168 x 56 x 30.5 mm / 6.6 x 2.2 x 1.2 in
Weight	75 g / < 1 lb

PCE Instruments PCE-444 Thermo-Hygrometer