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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.

Testo 872 – Smart thermography with the highest image quality.

  • Infrared resolution 320 x 240 pixels testo SuperResolution technology 640 x 480 pixels
  • Thermal sensitivity 60 mK
  • With testo Thermography App
  • Integrated digital laser marker
  • Wireless measurement data transfer from clamp meter testo 770-3 and humidity measuring instrument testo 605i
  • testo ScaleAssist and testo ε-Assist


The testo 872 thermal imager stands out thanks to its resolution of 320 x 240 pixels, an excellent thermal sensitivity, numerous innovative functions, smartphone connection via the testo Thermography App and the best price-performance ratio of its class. For even more meaningful thermal images, the thermal imager testo 872 also wirelessly integrates the measurement values of the clamp probe testo 770-3 as well as the thermohygrometer testo 605i (both available as an option).

  • 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.

Recommended fields of application

  • Detecting structural defects and ensuring construction quality
  • Energy consulting (including building shell)
  • Leakage detection
  • Preventive maintenance

Technical Data

Infrared image output
Infrared resolution 320 x 240 pixels
Thermal sensitivity (NETD) 60 mK
Field of view/min. focusing distance 42° x 30° /

< 0.5 m

Geometric resolution (IFOV) 2.3 mrad
testo SuperResolution (pixels/IFOV) 640 x 480 pixels

1.3 mrad

Image refresh rate 9 Hz
Focus Fixed focus
Spectral range 7.5 to14 µm
Visual image output
Image size /

min. focusing distance

at least 3.1 MP /

0.5 m

Image presentation
Image display 8.9 cm (3.5″) TFT, QVGA (320 x 240 pixels)
Digital zoom 2x, 4x
Display options IR image / real image
Colour palettes iron, rainbow, rainbow HC, cold-hot, blue-red, grey, inverted grey, sepia, Testo,

iron HT

Data interfaces
WLAN Connectivity Communication with the testo Thermography App
Bluetooth1) Measurement value transfer from thermohygrometer testo 605i, clamp meter testo 770-3 (optional)
USB 2.0 Micro B
Measuring ranges Measuring range 1: -30 to +100 °C

Measuring range 2: 0 to +650 °C

Accuracy ±2 °C, ±2 % of measurement value (larger value applies)
Emissivity /

reflected temperature compensation

0.01 to 1 / manual
testo ε-Assist Automatic recognition of emissivity and determination of reflected temperature (RTC)
Measurement functions
Analysis functions Mean point measurement, hot/cold-spot recognition, Delta T,

area measurement (min-max on area)

testo ScaleAssist
IFOV warner
Humidity mode – manual
Humidity measurement with humidity measuring instrument1) Automatic measurement value transfer of thermohygrometer testo 605i via Bluetooth (instrument must be ordered separately)
Solar mode – manual Input of solar radiation value
Electrical mode – manual Input of current, voltage or power
Electrical measurement with clamp meter1) Automatic measurement value transfer   of clamp meter testo 770-3 via Bluetooth (instrument must be ordered separately)
Imager equipment
Digital camera
Lens 42° x 30°
Laser2) Laser class 2
Video streaming via USB, via wireless LAN with testo Thermography App
Storage as JPG
Fullscreen mode
Image storage
File format .bmt and .jpg; export options in .bmp, .jpg,

.png, .csv, .xls

Memory Internal memory (2.8 GB)
Power supply
Battery type Li-ion battery can be changed on-site
Operating time 4 hours
Charging options In instrument/in charging station (optional)
Mains operation
Ambient conditions
Operating temperature range -15 to +50 °C
Storage temperature range -30 to +60 °C
Air humidity 20 to 80 %RH, not condensing
Housing protection class (IEC 60529) IP54

(IEC 60068-2-6)

Physical features
Weight 510 g
Dimensions (LxWxH) 219 x 96 x 95 mm
Housing PC – ABS
PC software
System requirements Windows 10, Windows 8, Windows 7
Standards, tests
EU directive EMC: 2014/30/EU RED: 2014/53/EU