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  5. BM31 Moisture Indicator

BM31 Moisture Indicator

Quick localisation of near-surface moisture

The BM31 is an electronic moisture indicator by use of which one can quickly and easily detect near-surface moisture in different materials and expeditiously locate moisture distributions in wall, floor and ceiling.

Owing to the dielectric measurement method, moisture indication takes place in an absolutely non-destructive manner, no electrodes or probes have to be inserted into the material to be measured.

The BM31 is not only ready for immediate use, during measurement it also impresses with fast response times and at the push of a button shows the user helpful additional information such as minimum and maximum values in addition to the current real-time measured value on the easily legible back-lit display. Additionally, the momentarily measured value can be recorded via the hold function.

With the BM31 it is not only possible to quickly indicate different near-surface material moisture values, it is also especially suited for the preliminary check of the building materials' readiness for covering for CM measurements.

A few practical benefits:

  • Development, design, production: 100 % Trotec
  • Quick and non-destructive indication of moisture distributions in near-surface areas
  • Useful pre-examination tool for CM measurements
  • Maximum or minimum value and hold function
  • Automatic testing of functions and batteries
  • Ready for immediate use
  • Optimum price-performance-ratio
  • Backlit display
  • Automatic switch-off
  • Practice-optimized German industrial design – protected design patent


Feuchtemessgerät / Feuchteindikator BM31 show in Trotec online shop

Feuchtemessgerät / Feuchteindikator BM31

You save: 26 %

94.95 € 69.95 € incl. VAT Show net price (VAT not included)


Technical data

Technical data
General information
  Article number 3.510.205.031
Wood moisture [%]
  Min. measuring range | Wood moisture [%]
  Max. measuring range | Wood moisture [%]
  Resolution | Wood moisture [%]
  Accuracy | Wood moisture [%]
  Measuring principle
  Min. temperature compensation [%]
  Max. temperature compensation [%]
Material moisture [%]
  Min. measuring range | Material moisture [%]
  Max. measuring range | Material moisture [%]
  Accuracy | Material moisture [%]
  Resolution | Material moisture [%]
  Measuring principle
Material moisture [digits]
  Min. measuring range | Material moisture [Digit] 0
  Accuracy 1
  Resolution [Digit] 1
  Measuring principle Dielectric/capacitive
  Min. penetration depth (non-destructive) [mm] 5
  Max. penetration depth (non-destructive) [mm] 40
  Max. measuring range | Material moisture [Digit] 100
Power supply
  Internal (battery) 1 x 9 V battery
Device control
  Push buttons
Ambient conditions
  Operation - min. temperature [°C] 0
  Operation - max. temperature [°C] 50
  Operation – min. relative humidity [% r.F.]
  Operation - max. relative humidity [% RH] 80
Housing design
  Length (packaging excluded) [mm] 180
  Width (packaging excluded) [mm] 35
  Height (packaging excluded) [mm] 45
  (packaging excluded) [kg] 0.18
Standard scope of delivery
Standard scope of delivery
  Measuring device
  Operating manual
  Protective cap
  Electrode tips (1.5 x 20 mm)
  Electrode tips (2.2 x 8 mm)
  2 x union nuts
  Wood type directory
  Factory test certificate
Ascertainable measured values and functions
Internal sensors
  Material moisture [digits]
  Wood moisture [%]
  Material moisture [%]
Functions and features
  Minimum value display
  Maximum value display
  Measured value hold function
  Automatic switch-off
  Non-destructive measurement method
  Backlit display
  Acoustic alarm function
  Selection sensor characteristic map (sens)
  Unit 2
  Selection of wood material characteristics (Mat)
  Temperature compensation
  Manual temperature setting
  Automatic functional test
  Automatic battery test
  Mode selection slide control
  Retaining clip

 standard equipment

 optionally available

 not available



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