Since 1910， General Tools has grown to become a recognized industry leader for specialty hand tools and instruments. The General Tools Multi-Function Thermo-Hygrometer with Pin/Pinless Moisture Meter can measure 1) ambient temperature， 2) relative humidity (RH)， 3) absolute humidity (in mg/L or g/m3)， 4) GPP (mixing ratio in grains per pound or g/kg)， 5) relative moisture level using pinless sensor， 6) absolute moisture level using included pin-type probe， 7) dew point， 8) atmospheric pressure and 9) vapor pressure. It's ideal for water damage restoration contractors， facility maintenance professionals and HVAC system installers/technicians.

Stores/recalls 20 pairs of readings

Settable high and low alarms for RH， relative moisture level and absolute moisture level

Backlit LCD with 3-digit primary readout plus 4-digit secondary readout

Field calibratable humidity measurement

Min/max， data hold and 30-minute auto power off functions

Ambient temperature measurement range/accuracy: -20 to 167˚F

RH measurement range: 0 to 100%

RH measurement accuracy: ±2.5% from 11 to 90%RH; ±3%RH elsewhere

Absolute humidity range: 0.5 to 240mg/m3

GPP range: 0 to 999/GPP (0 to 160g/kg)

Relative/absolute moisture level range: 0 to 99.9%

External moisture probe measurement accuracy/resolution: ±3%/0.1%

External probe pin length: 3/8 in. (10 mm)

Dew point range: -76 to 140˚F

Atmospheric pressure range: 30 to 120 KPA

Includes meter， external moisture probe and soft carry case