Wall Mounted Thermometer Hygrometer Moisture Meter DYWSJ

Specification :

Temperature Range : -20℃~50℃
Humidity Range : 10%RH~90%RH
Temperature Error : <10℃ ± 2℃, 10℃~25℃ ± 1.5℃, >25℃ ± 2℃
Humidity Error : <40%RH ± 7%RH, 40%RH ~75%RH ± 5%RH, >75%RH ± 7%RH

Nice for : Home, office, hotel, restaurant, school, meeting rooms, factories, shopping malls, warehouses, waiting room, hospital, yard, garden, etc.

Humidity Calibration Method :

Put a wet towel to cover at the back of meter or wrap up the entire about 30 minutes.
At this time the meter should display the humidity readings is at 95% RH
If the pointer does not point to 95%RH, please use the screwdriver to open the back shroud and calibrate to 95%RH (or do not need to open the back shroud, just calibrate directly at the back of the meter)