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 F Displays humidity as %RH, absolute as grams per cubic meter(g/m) or grains per cubic foot(gr/ft) Wet bulb and dew point measurements Simultaneous display of humidity and temperature readings 56mm LCD display with backlight Data hold freezes displayed measurements Min/max memory for both temperature and humidity Low battery indication Auto power off after 10 minutes of no activity can be user disabled Impact-resistant ABS case with rubber moulded grip and tripod mount bush Supplied with briefcase