Testo 871: Thermal Imager (240 x 180 pixels, App)

Excluding VAT

Key Features

  • Very good image quality: IR resolution of 240 x 180 pixels, via integrated testo SuperResolution Technology 480 x 360 pixels
  • Wireless networking: wireless transmission of readings from the Testo 770-3 clamp meter and the testo 605i thermohygrometer (both available separately)
  • Smart: the free Testo Thermography App enables you to write and send reports on-site, as well as save them online, and lots more.
  • Large temperature measuring range from -30°C to +650°C


– Infrared image output

Infrared resolution: 240 x 180 pixels

Thermal sensitivity: 90 mK

Field of view: 35° x 26°

Minimum focus distance: <0.5 m

Geometric resolution (IFOV): 2.6 mrad

SuperResolution (Pixel): 480 x 360 pixels

SuperResolution (IFOV): 1.6 mrad

Image refresh rate: 9 Hz

Focus: Fixed focus

Spectral range: 7.5 to 14 µm

– Image output visual

Image size: at least 3.1 MP

Minimum focus distance: 0.5 m

– Image presentation

Display type: 8.9 cm (3.5″) TFT, QVGA (320 x 240 pixels)

Display option: IR image / real image

Colours: 4 (iron, rainbow, cold-hot, grey)

– Measurement (Testo 871)

Measuring range: -30 to +100 °C; 0 to +650 °C

Accuracy: ±2 °C, ±2 % of mv

Emissivity: 0.01 to 1

Reflected temperature: manual

testo ε-Assist: Included

– Measuring function

Solar mode – manual: Input of solar radiation value

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

Electrical mode – manual: Input of current, voltage, or power

IFOV warner: Included

Humidity mode – manual: Included

testo ScaleAssist: Included

Humidity measurement with humidity measuring instrument: Automatic measurement value transfer of thermohygrometer testo 605i via Bluetooth (instrument must be ordered separately)

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

– Imager equipment

Full-screen mode: Included

JPEG storage: Included

Video streaming: via wireless LAN with testo Thermography App

Standard lens: 35° x 26°

Digital camera: Included

Interface: USB 2.0 Micro B

WLAN Connectivity: Communication with the testo Thermography App wireless module BT/WLAN (EU, EFTA, USA, AUS, CDN, TR)

Bluetooth: 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: 4.0 h

Mains operation: yes

– Ambient Condition (Testo 871)

Air humidity: 20 to 80 %RH non-condensing

Housing protection class: IP54

Vibration: 2G

Storage temperature: -30 to +60 °C

Operating temperature: 15 to +50 °C

– PC software

System requirements: Windows® 10; Windows® 8; Windows® 7

– General technical data

Product color: Black

Display ligthing: bright / normal / dark

– Physical specification

Product-/housing material: PC – ABS

Weight: 510 g

Dimensions: 219 x 96 x 95 mm

Features Testo 871

– Very good image quality due to high resolution: 43,200 temperature measuring points for precise thermography. Infrared resolution of 240 x 180 pixels – extendible to 480 x 360 pixels via integrated SuperResolution Technology
– Detecting temperature differences from 0.09°C
– The testo Thermography App enables you to write reports on site, save them online and send them by e-mail, as well as allowing you to use mobile terminal devices as a second display or for remote control
– 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 generates 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 the thermal insulation behavior 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


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