testo 872 - thermal imager with App

  • Highest image quality: IR resolution of 320 x 240 pixels, via integrated testo SuperResolution Technology 640 x 480 pixels
  • Precise measurement: thermal sensitivity of 0.06°C
  • Smart and wireless: use your mobile device with the free testo Thermography App and wirelessly transmit readings from the testo 770-3 clamp meter and the testo 605i humidity measuring instrument (both available separately)
  • Integrated laser marker – can also be precisely visualized as a measuring point in the thermal image

The testo 872 thermal imager gives you the best possible support for  your work in professional industrial and building thermography. Take  thermal images quickly, reliably and smartly with the highest image  quality, very good thermal sensitivity and innovative functions. The  case supplied with the thermal imager means it can be conveniently  transported, so it is always there for you when needed.

testo 0560 8721

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The testo 872 thermal imager is ideally suited for professional industrial and building thermography - at the same time it ensures your work is both quick and easy. It is versatile to use, for example in industrial and mechanical maintenance or for detecting structural defects. You can generate error-free and objectively comparable infrared images using its handy functions. The IFOV warner, testo ɛ-Assist and testo ScaleAssist mean you can avoid measurement errors and not only effortlessly achieve optimum setting of emissivity (ɛ) and reflected temperature (RTC) for building thermography, but also of thermal image scale.

The testo 872 thermal imager– smart and networked

The testo 872 thermal imager guarantees wireless communication with mobile terminal devices via WLAN. The testo Thermography App for iOS and Android offers you the possibility of writing and sending reports on site, as well as saving them online, and of using your smartphone or tablet as a second display or for remote control.

The testo 872 delivers even more informative thermal images in combination with the compatible 770-3 clamp meter and testo 605i thermohygrometer. Both are available separately – simply order them straight away along with your testo 872. The thermal imager wirelessly integrates the measurement results of these measuring instruments via Bluetooth. The additional output, current and voltage values of the testo 770-3 clamp meter enable better interpretation of measured temperatures. Measure the air temperature and humidity with the testo 605i humidity measuring instrument and easily detect locations at risk of developing mould using the special humidity palette in the thermal imager via the traffic light principle.

Areas of application of the testo 872 thermal imager

Detect locations at risk of developing mould, pinpoint thermal bridges, discover structural defects or identify overheated connections. The testo 872 thermal imager is ideal for applications in daily maintenance and installation work in trade and industry. Quick, simple and reliable for maintenance and detection of defects.

Technical highlights of the testo 872 thermal imager

The testo 872 thermal imager is characterized by its easy handling and its outstanding image quality. Its technical features are impressive:


  • Highest image quality thanks to high resolution: 76,800 temperature measuring points for precise thermography. Infrared resolution of 320 x 240 pixels – extendible to 640 x 480 pixels via integrated SuperResolution Technology
  • Detecting temperature differences from as little as 0.06°C
  • testo Thermography App to use mobile terminal devices as a second display and for remote control or to write and send reports, along with saving them online
  • Wireless communication thanks to Bluetooth – this means you can also wirelessly integrate the readings of the compatible testo 770-3 clamp meter and testo 605i thermohygrometer
  • Built-in digital camera and laser marker generate a real image in parallel to the thermal image
  • Critical temperature conditions are directly displayed via automatic hot-cold spot recognition
  • The testo ScaleAssist automatically ensures optimum setting of the thermal image scale, which means you generate objectively comparable and error-free thermal images, for example of the thermal insulation behaviour of buildings
  • The testo ɛ-Assist ensures the correct measurement result by automatically determining and setting the emissivity and reflected temperature
  • The IFOV warner means the distance from the measurement object / measurement spot size is determined and the measurement spot is shown on the thermal image – you therefore avoid measurement errors because the camera shows you exactly what you can measure
  • Pro software for image evaluation on the PC
  • You can choose to save thermal images as JPEGs



testo 872 thermal imager with radio module for Bluetooth/WLAN, USB cable, mains unit, lithium-ion rechargeable battery, pro software IRSoft (free download), 3 x testo ε-Markers, commissioning instructions, short instructions, calibration protocol and case.


Infrared image output
                            Fixed focus
Infrared resolution
                            320 x 240 pixel
Image refresh rate
                            9 Hz
SuperResolution (IFOV)
                            1.3 mrad
SuperResolution (Pixel)
                            640 x 480 pixels
Geometric resolution (IFOV)
                            2.3 mrad
Minimum focus distance
                            <0.5 m
Field of view
                            42° x 30°
Thermal sensitivity
                            60 mK
Spectral range
                            7.5 to 14 µm


Image output visual
Minimum focus distance
                            0.5 m
Image size
                            at least 3.1 MP


Image presentation
Display option
                            IR image / real image
                            10 (iron, rainbow, rainbow HC, cold-hot, blue-red, grey, inverted grey, sepia, Testo, iron HT)
Display type
                            8.9 cm (3.5") TFT, QVGA (320 x 240 pixels)
Digital zoom
                            2x; 4x


Reflected temperature
testo ε-Assist
Measuring range
                            -30 to +100°C; 0 to +650°C
                            ±2 °C, ±2 % of m.v.
                            0.01 to 1


Measuring function
Solar mode – manual
                            Input of solar radiation value
Analysis function
                            Mean point measurement, hot/cold-spot recognition, Delta T, area measurement (min-max on area)
Humidity measurement with humidity measuring instrument
                            Automatic measurement value transfer of  thermohygrometer testo 605i via Bluetooth (instrument must be ordered  separately); Wireless permit in EU, EFTA, USA, Canada, Australia, Turkey
testo ScaleAssist
Humidity mode - manual
IFOV warner
Electrical mode - manual
                            Input of current, voltage or power
Electrical measurement with clamp meter
                            Automatic measurement value transfer of  clamp meter testo 770-3 via Bluetooth (instrument must be ordedered  separately); Wireless permit in EU, EFTA, USA, Canada, Australia, Turkey


Imager equipment
Digital camera
Full screen mode
JPEG storage
Video streaming
                            via wireless LAN with testo Thermography App
                            Laser marker
Standard lens
                            42° x 30°
                            USB 2.0 Micro B
WLAN Connectivity
                            Communication with the testo Thermography App wireless module BT/WLAN (EU, EFTA, USA, AUS, CDN, TR)
                            Measurement value transfer from  thermohygrometer testo 605i, clamp meter testo 770-3 (optional);  Wireless permit in EU, EFTA, USA, Canada, Australia, Turkey


Imager storage
File format image
                            .bmt; .jpg; export option in .bmp; .jpg; .png; .csv; .xls
Storage device
                            Internal Memory (2.8 GB)


Power supply
Battery type
                            Fast-charging, Li-ion battery can be changed on-site
Operating time
                            4 h
Mains operation
Charging options
                            In instrument / charger (optional)


Ambient Condition
Housing protection class
Air humidity
                            20 to 80 %RH non-condensing
Storage temperature
                            -30 to +60 °C
Operating temperature
                            -15 to +50 °C


Physical specification
Product-/housing material
                            PC - ABS
                            510 g
                            219 x 96 x 95 mm


PC software
System requirements
                            Windows® 10; Windows® 8; Windows® 7


Standards, tests, warrenty
                            RED: 2014/53/EU; EMC: 2014/30/EU


General technical data
Product colour
Display ligthing
                            bright / normal / dark

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