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  1. Products & Services
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  4. Humidity measuring devices
  5. BM18 Moisture measuring device

BM18 Moisture measuring device

Reliable measurements of wood and building moisture at the touch of a button

It takes only one button to switch the BM18 on and effect all settings. For the measuring modes (wood moisture, building moisture) and temperature (°C, °F) selection, press and hold the button for roughly 3 seconds.

In case of temperature measurements, the device indicates the current ambient temperature. In case of moisture measurements, simply push the insertion measuring pins a few millimetres into the material to be measured. This way, you obtain precise and quick results. When measuring in dark surroundings, one touch of the button activates the background illumination. It goes out again automatically after 3 seconds.

When not in use, the device switches off automatically after 30 seconds to ensure a long battery life. An insufficient battery voltage is indicated on the clearly legible display in good time.

The memory of the BM18, too, includes a calibration curve for the moisture measurement of wood types common in Europe. No further settings are required for the determination of the wood moisture content.

A few practical benefits:

  • Wood and material moisture measurement with one device
  • With protection cover
  • Simple handling via one button
  • Excellent value for money
  • Ready for immediate use
  • Display of ambient temperature either in °C or in °F
  • Calibration curve for standard types of wood
  • LED humidity indicator incl.
  • Easily changeable steel insertion measuring pins
  • Direct display of measured values in %
  • Mode selection key
  • Battery status indication
  • Automatic switch-off


BM18 Moisture Meter show in Trotec online shop

BM18 Moisture Meter

In addition to the building and wood moisture content, the moisture meter BM18 also determines the ambient temperature, which can be read in either ° C or ° F. On the backlit display each measured value can be easily read even in the dark.

You save: 35 %

18.49 £ 12.01 £ incl. VAT
Show net price (VAT not included)



Technical data
General information
  Article number 3.510.205.023
Wood moisture [%]
  Min. measuring range [%] 6
  Max. measuring range [%] 60
  Resolution [%] 1
  Approx. accuracy ± [%] 1
  Min. temperature compensation [%]
  Max. temperature compensation [%]
  Measuring principle Resistance measuring method
Material moisture [%]
  Min. measuring range [%] 0.2
  Max. measuring range [%] 2.9
  Accuracy [%]
  Resolution [%] 0.1
  Measuring principle Resistance measuring method
Material moisture [digits]
  Min. measuring range [Digit]
  Max. measuring range [Digit]
  Resolution [Digit]
  Measuring principle
  Min. penetration depth (non-destructive) [mm]
  Max. penetration depth (non-destructive) [mm]
Device control
  Push buttons
Housing design
  Electrode length [mm] 8
Power supply
  Internal (battery) 1 x 9 V block battery
Surrounding conditions
  Operation - min. temperature [°C] 0
  Operation - max. temperature [°C] 40
  Operation – min. relative humidity [% RH] 0
  Operation - max. relative humidity [% RH] 85
  Length (packaging excluded) [mm] 122
  Width (packaging excluded) [mm] 45
  Height (packaging excluded) [mm] 51
  (packaging excluded) [kg] 0.115
Standard scope of delivery
Standard scope of delivery
  Measuring device
  Protective cap
  Electrode tips (2.2 x 8 mm)
  Operating manual
  Electrode tips (1.5 x 20 mm)
  2x union nuts
  Wood type directory
  Factory test certificate
Ascertainable measured values and functions
Internal sensors
  Material moisture [%]
  Wood moisture [%]
  Ambient temperature [°C]
  Material moisture [digits]
Functions and features
  LED moisture indicator
  Material selection
  Hold function
  Switching function °C/°F
  Automatic switch-off
  Backlit display
  Battery status indication
  Maximum value display
  Minimum value 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
  Non-destructive measurement method
  Mode selection slide control
  Retaining clip

 standard equipment

 optionally available

 not available


Alternative products

BM18 with alternative products:

start comparison
BM12 Moisture Meter show in Trotec online shop

BM12 Moisture Meter

Besides the building and wood moisture the BM12 Moisture Meter determines the ambient temperature, which can be read off optionally °C or °F.

You save: 30 %

12.01 £ 8.29 £ incl. VAT
Show net price (VAT not included)


BM31 Moisture Meter show in Trotec online shop

BM31 Moisture Meter

The BM31 Moisture meter for fast and non-destructive indication of moisture distribution at areas near to surface (depth of penetration 5 to 40 mm). For ideal localisation of the moisture, this device disposes about a min- and maximum value display, a hold function and an illuminated display.

You save: 36 %

88.04 £ 55.58 £ incl. VAT
Show net price (VAT not included)


T510 Moisture Meter show in Trotec online shop

T510 Moisture Meter

The T510 is a professional hand-held measuring device for the exact determination of wood and material moisture content according to the resistance measuring method.

182.05 £ incl. VAT
Show net price (VAT not included)


T610 Moisture Meter, Microwave show in Trotec online shop

T610 Moisture Meter, Microwave

Thanks to the microwave method it is possible to determine moisture up to a depth of 300 mm using the T610 material moisture measuring device. You can achieve extremely accurate and conclusive results with this measuring device when grid measurements are carried out, for example.

579.26 £ incl. VAT
Show net price (VAT not included)


T660 Moisture Meter show in Trotec online shop

T660 Moisture Meter

The T660 moisture measuring device allows the user to detect moisture in brickwork, walls and even campers and RVs using non-destructive technology. The device penetrates materials up to a depth of 4 cm and provides the user with precise information regarding moisture content and distribution.

187.57 £ incl. VAT
Show net price (VAT not included)