Calibration Check Box for MRH3. The calibration check box allows for regular on-site calibration checks.
The Tramex MRH III Moisture and Humidity Meter is a hand-held digital moisture meter calibrated for most building materials. It also attaches to an optional plug-in Tramex Hygro-i ® relative humidity probe and heavy-duty pin type electrodes. Suitable for many industries including Water Damage 
Restoration, Flooring, Indoor Air Quality, Home Inspection and Pest Control.
Calibration Check Plate Tramex CME5, CMEX5, CME4 and CMEX2.