The General Tools Digital Thermo-Hygrometer Psychomotor can measure any environment's ambient temperature， relative humidity (RH) and dew point and wet bulb temperatures. The meter can display the relative humidity (RH) above the ambient， dew point or wet bulb temperature on a backlit dual-readout LCD. The digital meter can measure temperatures with a range from 14-122°F and has an accuracy of ±1.8°F. RH measurement range 0-99.9% with a ±3% accuracy from 5-95%RH. The General Tools 4-Function Digital Thermo-Hygrometer Psychomotor is a great tool for Water damage restoration contractors， HVAC/R system installers and technicians and Professionals charged with monitoring and maintaining the environments of facilities.

Jumbo backlit display with 2-line readout

Field calibratable using 33% and 75% salts (not included)

Data hold and minimum/maximum functions

°F/°C switch

20-minute auto power off function

Low battery indicator

NIST calibration is available

Use in: office buildings， greenhouses， food and equipment storage facilities， wineries， freezers， shipping containers， computer rooms， labs， libraries， museums and saunas

Powered by 9-Volt battery (included)