The Dwyer 485B digital thermo-hygrometer is a versatile, compact handheld instrument for measuring relative humidity and temperature in °F or °C. Dew point and wet bulb temperature are derived from RH and temperature measurements and displayed on the LCD. The Hold key freezes readings for fluctuating conditions, and nonvolatile memory stores up to 99 readings for later analysis.

Specifications: RH range 0–100% (non-condensing), accuracy ±2% FS over 10–90% @ 77°F (25°C), resolution 0.1%; temperature range -20 to 140°F (-28 to 60°C), accuracy ±0.9°F @ 72°F (±0.3°C @ 25°C), resolution 0.1°F/°C. Probe length: 8" insertion. Powered by 9V alkaline battery. CE approved.