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BM31WP material moisture measuring device controlled via smartphone
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  2. Measuring devices
  3. appSensors
  4. BM31WP

BM31WP moisture indicator

Material moisture measuring device as appSensor controlled via smartphone

When used in combination with the MultiMeasure Mobile app, the appSensor BM31WP is an electronic moisture indicator permitting capacitive, non-destructive, near-surface moisture measurements in walls, floors or ceilings.

The measuring device BM31WP is immediately ready for use, it can be connected to the app without the slightest effort and permits the quick and easy and perfectly non-destructive detection of near-surface moisture distributions in walls, floors or ceilings.

With the BM31WP it is not only possible to quickly indicate different near-surface material moisture values, this appSensor is also especially suited for the preliminary check of the building materials' readiness for covering for CM measurements.

Compared to moisture measuring devices without app users of the BM31WP benefit from the clever combination of appSensor and appertaining, free MultiMeasure Mobile app with numerous additional advantages in terms of flexibility, analysis functions, data control and documentation.

Compare the humidity measurements of an object created at different points in time directly in the app. Or use the measured values for differentiated on-site analyses.

Useful additional features as the alarm function, the export of measured humidity values to a secondary analysis software as well as the report generation function complete the universal application possibilities of the BM31WP and render it a valuable tool for all building diagnostics tasks.

For the matrix measurement with background image you can take a photo of the wall the to be measured directly from the app.
Photo of the wall to be measured
Having determined all individual measuring points, you can use the saved measurement to generate a two-dimensional, coloured graphic representation of the humidity distribution as matrix.
Humidity matrix
For documentation purposes real image and humidity matrix can also be displayed as image overlay.
Real image and humidity matrix as image overlay

A humidity matrix easily generated and linked to a photo

Using the MultiMeasure Mobile app, minimum, maximum and average values can be displayed fully automatically, individual measured values can be marked directly within an image and elaborate graphic representations, e.g. a humidity matrix linked to a photo, can be created, saved and sent.

The measurement grid can be supplied with a real image background and later be displayed as image overlay with humidity matrix for documentation purposes, e.g. for your measurement report which can be generated and sent on site directly from the app.

What is an appSensor?

Trotec appSensor

Trotec appSensors are compact precision measuring devices with high-quality sensors. Designed in a way to save space and energy, they have neither display unit nor evaluation electronics – data analysis and operation are realized almost entirely by means of the connected smartphone. Combined with the free app MultiMeasure Mobile this measuring device concept offers many compelling advantages.

All of Trotec's appSensors offer the following advantages:

  • Professional sensors for precise measuring results
  • Foolproof connection of the app via Bluetooth with visual connection confirmation by means of an LED at the device
  • Wireless control of the measuring devices and display of data via app
  • Simple measured value detection even at remote locations since the values do not have to be read directly from the measuring device
  • Additional determination and indication of minimum, maximum and average values
  • Hold, logging and alarm functions
  • Wrist strap for safe handling included in the scope of delivery
  • Practice-optimized German industrial design – protected design patent

Why use appSensors? Aren't there a lot of measuring apps already?

Of course there are numerous apps using the electronic components integrated in smartphones, e.g. microphone, gyroscope or camera, for measurements and derived calculations. But these components haven't been designed for precise metrological inspections, instead mainly for an optimized application on a mobile device.

Hence, the obtained results are not in the least comparable with the results achieved by sensors specifically designed for measuring applications. Besides, your smartphone may not be equipped with the suitable electronic component for every measurement task, e.g. for contact moisture measurements or non-contact temperature measurements.

Trotec appSensors on the other hand house professional sensors for precise measuring results –which is just what they were made for. So, be smart and use the clever combination of appSensor and MultiMeasure Mobile – our free app available for both iOS and Android – to carry out professional measurements.

The appSensor BM31WP is automatically identified by MultiMeasure Mobile.
Simple Bluetooth connection to MultiMeasure Mobile
Displayed in addition to the digit value are indicative values in M% and CM% for the preliminary check of a screed's readiness for covering.
Numeric display of measured values
In the appSensor's context menu you can switch over between cement screed and anhydrite screed and define alarm thresholds.
Can be switched over between cement screed and anhydrite screed
In case of a humidity matrix measurement the app guides you through the entire measurement procedure one cell at a time.
App-aided measurement process

MultiMeasure Mobile – all of the app's advantages at one glance

MultiMeasure Mobile app

To control this appSensor via smartphone, you first have to download MultiMeasure Mobile – a free app for the operation, evaluation and measured value indication of all the appSensors connected to your mobile device.

MultiMeasure Mobile has numerous advantages in store for you:

  • Automatic identification of appSensors
  • Simultaneous operation of several appSensors
  • Quick and intuitive navigation
  • Numerical measured value indication or else in form of a chart / matrix
  • Integrated report function for the documentation directly on site
  • PDA function for the organization of measurement data and documents
  • Customer management already integrated
  • Manifold analysis options directly in the app
  • Storage of measured values linked to photos
  • Matrix measurements, also linked to photos
  • Complete data synchronization with MultiMeasure Professional via cloud

MultiMeasure Mobile turns your mobile terminal device into a multifunctional measurement data management tool.

All appSensors are automatically identified by the app and can be connected to and read by MultiMeasure Mobile using Bluetooth. The operation is as simple and intuitive as the installation: Simply download MultiMeasure Mobile for free onto your mobile device – click here to go to the iOS or Android download page.

Direct link to MultiMeasure Mobile in the app store:

MultiMeasure Mobile for Android
MultiMeasure Mobile for iOS

BM31WP material moisture measuring device as appSensor controlled via smartphone

BM31WP – A few practical benefits:

  • Quick and non-destructive indication of moisture distributions in near-surface areas
  • Useful pre-examination tool for CM measurements
  • High-quality sensor technology and numerous measuring functions
  • Intelligent combination of appSensor and The MultiMeasure Mobile app
  • Automatic switch-off
Capacitive material moisture measuring device as appSensor controlled via smartphone
Practice-optimized German industrial design – protected design patent


BM31WP Moisture Indicator with Smartphone Operation show in Trotec online shop

BM31WP Moisture Indicator with Smartphone Operation DEAL

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Technical data

Technical data
General information
  Article number 3.510.206.031
Material moisture [digits]
  Min. measuring range | Material moisture [Digit] 0
  Resolution [Digit] 0.1
  Measuring principle Dielectric / capacitive
  Max. measuring range | Material moisture [Digit] 100
Ambient conditions
  Operation - min. temperature [°C] 0
  Operation - max. temperature [°C] 50
  Operation – min. relative humidity [% r.F.] 10
  Operation - max. relative humidity [% r.F.] 90
  Relative humidity during storage [%] <� 80% RH
  4.0 (BLE)
  Max. transmission range 10 m in open terrain
  Length (packaging excluded) [mm] 22
  Width (packaging excluded) [mm] 36
  Height (packaging excluded) [mm] 160
  (packaging excluded) [kg] 0.093
Standard scope of delivery
Standard scope of delivery
  Measuring device
  Wrist strap
  Operating manual
Ascertainable measured values and functions
Internal sensors
  Material moisture (capacitive)
Functions and features
  Battery status indication
  Minimum value display
  Maximum value display
  Average value display
  Measured value hold function
  Automatic switch-off
  Alarm function
  Long-term measurement function
  Representation of measurement data as chart, matrix or table
  Data export
  Report generation function

 standard equipment

 optionally available

 not available



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