This precision thermo-hygrometer is a compact, easy-to-use, robust instrument for fast, accurate and repeatable measurements of absolute and relative humidity, air temperature, dew point and wet bulb temperatures. It is ideal for single handed operation when taking measurements in air stream. Suitable for monitoring air conditioning and heating system ducts, controlled environments, storage areas and other critical areas. -30 to 100C x 0.1, 0% to 100%RH x 0.1%Displays temperature in C or FDisplays humidity as %RH, absolute as grams per cubic meter(g/m) or grains per cubic foot(gr/ft)Wet bulb and dew point measurementsSimultaneous display of humidity and temperature readings56mm LCD display with backlightData hold freezes displayed measurementsMin/max memory for both temperature and humidityLow battery indicationAuto power off after 10 minutes of no activity can be user disabledImpact-resistant ABS case with rubber moulded grip and tripod mount bushSupplied with briefcase style carry case and battery2 year warranty