Extech RH305 Digital Psychrometer Kit , 0 to 100% RH/, -4 to 122F

Compact meter is ideal for field applications — it displays relative humidity and temperature simultaneously, and dew point or wet bulb or probe temperature on a large LCD. Features include a choice of readings in degF or degC, Min/Max, data hold, and auto power off. Unique sensor cap closes to protect the sensor during storage. Advanced features include the calculation of T1-T2 temperature differential with external temperature probe 37803-18 (sold separately).


Unique sensor cap closes to protect the sensor during storage. Meter can be calibrated in the field using optional RH calibration standard salts. Order meter only or the complete thermohygrometer kit.

Model number 37803-11 is a complete digital thermohygrometer kit, which includes 37803-10 meter, 37803-18 temperature probe, 37803-19/37803-20 RH calibration standard salt bottles, carrying case and two AAA batteries and carrying case.