6Environmental Measuring Instruments / Humidity and Temperature Meters / FHM 20

FHM 20

Moisture Meter

Moisture meter for wood and building materials.

Wood: Calibrated to 170 wood types in 8 groups.

Building materials: Gypsum, plaster, concrete, concrete screeds, mortar, cardboard, paper.

Measurement of humidity permeation, surface humidity, determination of dry and humid areas.


  • External moisture measurement probe
  • External temperature probe:
    at measurement with moisture and temperature probe the moisture measurement is carried out with automatic temperature compensation. This leads to a higher accuracy
  • 8 mm measuring pins (replaceable
  • Protective cap with integrated calibration check
  • Battery indicator
  • Automatic power-off (adjustable time

Supplied with


  • Moisture and temperature probe
  • Padded bag
  • 2 x spare measuring pins
  • 2 x AAA Batteries

Technical data

Measuring principleElectrical resistance
Measuring range wood6 – 99,9 %
Accuracy wood± 1 %*
Measuring range building materials3 – 33 %
Accuracy building materials± 1 %
Range temperature measurement0 °C – +60 °C
Dimensions180 x 50 x 31 mm
Weight175 g