Testo 871 Thermal Imager with App


Testo Approved distributor and service company.

The Testo 871 thermal imaging camera combines high infrared resolution with professional measuring performance and easy handling.

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0560 8712


£ 1,849.00

(£ 2,218.80 inc VAT.)

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Its high-quality pixel detector, an integrated digital camera and, last but not least, the innovative functions are the features that impress. The testo Thermography App enables the testo 871 to offer smart thermography to meet professional requirements in industry and trade. The case supplied with the thermal imager means it can be conveniently transported, so it is always there for you when needed.

Detect leaks, pinpoint thermal bridges, discover structural defects, identify overheated connections or assess mould damage. The Testo 871 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.

The Testo 871 thermal imager communicates wirelessly via WLAN with your mobile terminal devices. 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.

testo ε-Assist

For precise thermal images, it is important to set the emissivity (ε) and the reflected temperature of the object being examined in the imager. Previously, this was complicated, and with regard to the reflected temperature, less than accurate. This changes with testo ε-Assist: Simply attach one of the reference stickers included in delivery to the measurement object. Via the integrated digital camera, the thermal imager recognises the sticker, determines the emissivity and reflected temperature and sets both values automatically.

testo ScaleAssist

Since the temperature scale and colouring of thermal images can be adapted individually, it is possible that the thermal behaviour of a building, for example, can be wrongly interpreted. The testo ScaleAssist function solves this problem by adjusting the colour distribution of the scale to the interior and exterior temperature of the measurement object and the difference between them. This ensures objectively comparable and error-free thermal images.

For even more meaningful thermal images, the thermal imager 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).


Very good image quality due to high resolution.
Detecting temperature differences from 0.09°C.
Write reports on site, save them online and send them by e-mail using the App.
Wireless communication thanks to Bluetooth.
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.
Pro software for image evaluation on the PC.
You can choose to save thermal images as JPEGs.

Testo 871 Specifications:

  • Infrared resolution: 240 x 180 pixels.
  • Thermal sensitivity (NETD) 90 mK.
  • Field of view/min. focusing distance: 35° x 26° / < 0.5 m.
  • Geometric resolution (IFOV): 2.6 mrad.
  • Testo SuperResolution (Pixel/IFOV); 480 x 360 pixels / 2.6 mrad.
  • Image refresh rate: 9 Hz.
  • Focus: Fixed focus.
  • Spectral range: 7.5 to 14 μm.
  • Image display: 8.9 cm (3.5") TFT, QVGA (320 x 240 pixels).
  • Display options: IR image / real image.
  • Data interfaces: Bluetooth, USB 2.0 Micro B (x 4).
  • WLAN Connectivity: Communication with the testo Thermography App wireless module WLAN.
  • Measuring range 1: -30 to +100 °C.
  • Measuring range 2: 0 to +650 °C.
  • Accuracy: ±2 °C, ±2 % of measured value.
  • 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: Yes.
  • IFOV warner: Yes.
  • Humidity mode - manual: Yes.
  • Digital camera: Yes.
  • Imager Lens: 35° x 26°.
  • Video streaming: via USB, via wireless LAN with testo Thermography App.
  • Storage as JPG: Yes.
  • Fullscreen mode: Yes.
  • File format: .bmt and .jpg; export options in .bmp, .jpg, .png, .csv, .xls.
  • Memory: Internal memory (2.8 GB).
  • Battery type: Li-ion battery - can be changed on-site.
  • Mains operation: Yes.
  • Operating time: 4 hours.
  • Housing protection class (IEC 60529): IP54.
  • Weight: 510 g.
  • Dimensions (L x W x H): 219 x 96 x 95 mm.
  • Housing: PC - ABS.
  • System requirements: Windows 10, Windows 8, Windows 7.
  • Testo 871 Warranty: 2 years.


Includes: testo 871 thermal camera with radio module for Bluetooth/WLAN, USB cable, mains unit, lithium-ion rechargeable battery, pro software, 3 x testo ε-Markers, commissioning instructions, short instructions, calibration protocol and case.


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Testo 871 Thermal Imager with App