Testo 871



  • Infrared resolution 240 x 180 pixels
  • (with testoSuperResolution technology 480 x 360 pixels)
  • Thermal sensitivity 90 mK
  • Integrated digital camera
  • With testo Thermography App
  • Wireless measurement data transfer from clamp meter
  • testo 770-3 and humidity measuring instrument testo 605i
  • With testoScaleAssistand testo ε-Assist

Additional information

Infrared resolution

240 x 180 pixels

Thermal sensitivity (NETD)

90 mK

Field of view/min. focus distance

35° x 26° / < 0.5 m

Geometric resolution (IFOV)

2.6 mrad

testo SuperResolution (pixels/IFOV)

480 x 360 pixels 1.6 mrad

Image refresh rate

9 Hz


Fixed focus

Spectral range

7.5 to 14 μm

Image size / min. focus distance

at least 3.1 MP / 0.5 m

Image display

8.9 cm (3.5") TFT, QVGA (320 x 240 pixels)

Display options

IR image / real image

Colour palettes

iron, rainbow HC, cold-hot, grey

WLAN Connectivity

Communication with the testo Thermography App


Measurement value transfer fromthermohygrometer 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


±2 °C, ±2 % of measured value

Emissivity / reflected temperature compensation

0.01 to 1 / manual

testo ε-Assist

Automatic recognition of emissivity and determination of reflected temperature (RTC)

Analysis functions

Mean point measurement, hot/cold-spot recognition, Delta T

testo ScaleAssist

IFOV warner

Humidity mode – manual

Humidity measurement with humidity measuring instrument

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 meter

Automatic measurement value transfer of clamp meter testo 770-3 via Bluetooth (instrument must be ordered separately)

Digital camera


35° x 26°

EU directive

EMC: 2014/30/EU
RED: 2014/53/EU

Video streaming

via USB, via wireless LAN with testo Thermography App

Storage as JPG

Fullscreen mode

File format

.bmt and .jpg; export options in .bmp, .jpg, .png, .csv, .xls


Internal memory (2.8 GB)

Battery type

Li-ion battery can be changed on-site

Operating time

4 hours

Charging options

In instrument/in charging station (optional)

Mains operation

Operating temperature range

-15 to +50 °C

Storage temperature range

-30 to +60 °C

Air humidity

10 to 90 %RH, not condensing

Housing protection class (IEC 60529)


Vibration (IEC 60068-2-6)



510 g

Dimensions (LxWxH)

219 x 96 x 95 mm



System requirements

Windows 10, Windows 8, Windows 7


2 years


There are no reviews yet.

Be the first to review “Testo 871”