The Extech RH101 combination hygro-thermometer and infrared thermometer measures relative humidity, air temperature (with probe), and surface temperature (with IR function). A large backlit dual display allows user selection of infrared or humidity readings on the primary display, while the secondary display always indicates ambient temperature.

The IR thermometer includes a laser pointer for convenient targeting, 8:1 distance to spot ratio, and measures -58 to 932°F (-50 to 500°C) with fixed emissivity of 0.95. The humidity sensor measures 10-95% RH with 3.5% accuracy. Features include auto power off, low battery indicator, built-in stand, protective holster, and carrying case. Ideal for monitoring humidity in factories, clean rooms, offices, greenhouses, and non-contact surface temperature measurements in hard-to-reach areas like HVAC ducts.