Model RH401 has a built-in infrared thermometer with an 8:1 distance-to-target ratio and an adjustable emissivity from 0.3 to 1.0. The meter measures both ambient and surface temperatures and automatically calculates the infrared surface temperature/dewpoint differential. The backlit triple display enables simultaneous viewing of relative humidity and surface temperature, along with air temperature, dewpoint or wet bulb.
Extech Instruments
(781) 890-7440