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BP21WP pyrometer controlled via smartphone
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  2. Measuring devices
  3. appSensors
  4. BP21WP

BP21WP pyrometer

Infrared thermometer as appSensor controlled via smartphone

The appSensor BP21WP is a pyrometer permitting non-contact, infrared surface temperature measurements when used in combination with the MultiMeasure Mobile app.

The equipment was designed for a universal range of applications and a convenient measured value determination. In addition to an optical resolution of 10:1 and a temperature measuring range between -30 °C and +250 °C the BP21WP also features a useful multi-point laser which automatically visualizes the size of the measuring spot. The preset degree of emission saves you the trouble of making manual adjustments and covers a wide variety of materials. The measuring device BP21WP is immediately ready for use, it can be connected to the app without the slightest effort and then displays all the measured values on the mobile terminal device.

Compared to pyrometers without app users of the BP21WP 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 otherwise only featured by way more expensive measuring devices. One option is the multi-coloured graphic representation of temperature curves or of the temperature distribution on a wall by means of a matrix measurement.

With MultiMeasure Mobile you can make use of further functions and analysis options: in addition to the indication of minimum, maximum and average values you can enter individual limit values – exceeding or falling below these thresholds automatically triggers an acoustic alarm.

You can compare different temperature values measured for the same object at different points in time directly in the app or use the appSensor in combination with a simultaneously connected thermohygrometer BC21WP for a differentiated dew point control.

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.

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
The appSensor BP21WP is automatically identified by MultiMeasure Mobile.
Simple Bluetooth connection to MultiMeasure Mobile
The MultiMeasure Mobile app indicates all the values measured by the BP21WP easily legible on the display; besides the current measured value you can find minimum, maximum and average values.
Numeric display of measured values
By tapping on the screen you can switch between graphic and numeric display.
Chart representation of measured values
Owing to the multi-point technology a central targeting laser indicates the measuring point and eight additional lasers visualize the boundary points encircling the measuring surface. This permits precise measurements in a minimum of time and helps to prevent measurement errors.
Multi-point laser technology

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

BP21WP pyrometer as appSensor controlled via smartphone

BP21WP – A few practical benefits:

  • Non-contact surface temperature measurement from -30 °C to +250 °C
  • Multi-point laser
  • Measuring optics 10:1
  • High-quality sensor technology and numerous measuring functions
  • Intelligent combination of appSensor and The MultiMeasure Mobile app
  • Automatic switch-off
Combined thermohygrometer BC21WP for dew point recognition
Combined pyrometer BP21WP as dew point scanner

Our recommendation: using appSensors cleverly combined. If you simultaneously connect the BP21WP and the thermohygrometer BC21WP to the MultiMeasure Mobile app, you can adopt the dew point determined with the BC21WP as alarm threshold for the pyrometer BP21WP so as to obtain the functionality of a dew point scanner. An acoustic alarm signal generated by the app will be emitted by the terminal device when the measured temperature values reach or fall below the dew point.


BP21WP Pyrometer with Smartphone Operation show in Trotec online shop

Technical data

Technical data
General information
  Article number 3.510.006.031
  Optical resolution (D:S) 10:1
  Smallest measuring spot Ø 12.7 mm (Distance 254 mm)
Infrared temperature sensor [°C]
  Min. measuring range | Infrared temperature sensor [°C] -30
  Max. measuring range | Infrared temperature sensor [°C] 250
  Max. accuracy [°C] | Infrared temperature sensor ±3 °C (at >0 °C)
±2 °C / ±2 % (at ≤ 0 °C)
Infrared temperature sensor [°F]
  Min. measuring range | Infrared temperature sensor [°F] -22
  Max. measuring range | Infrared temperature sensor [°F] 482
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
  Storage - min. temperature [°C] -20
  Storage - max. temperature [°C] 60
  Relative humidity during storage [%] <� 80% RH
Temperature sensor
  Response time 0.3 s
  Spectral sensitivity 8 - 14 µm
Laser (target display)
  Class 2 (II)
  Wavelength [nm] 630-670 nm
  Power [mW] 1
  4.0 (BLE)
  Max. transmission range 10 m in open terrain
Power supply
  Internal (battery)
  Length (packaging excluded) [mm] 24.3
  Width (packaging excluded) [mm] 37
  Height (packaging excluded) [mm] 150.5
  (packaging excluded) [kg] 0.11
Standard scope of delivery
Standard scope of delivery
  Measuring device
  Wrist strap
  Operating manual
Ascertainable measured values and functions
Functions and features
  Temperature [°C]
  Temperature [°F]
Internal sensors
  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
  Multi-point laser aiming aid
  Non-contact measurement method
  Representation of measurement data as chart, matrix or table
  Data export
  Report generation function

 standard equipment

 optionally available

 not available



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