testo 872 - thermal imager with App

Order-Nr.  0560 8721

  • 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)

  • Innovative functions, such as testo ScaleAssist and testo ɛ-Assist for comparable, error-free thermal images

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.

Product Description

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


Delivery Scope

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

Infrared resolution

320 x 240 pixel


Fixed focus

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

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)

Digital zoom

2x; 4x

Display option

IR image / real image


10 (iron, rainbow, rainbow HC, cold-hot, blue-red, grey, inverted grey, sepia, Testo, iron HT)


Measuring range

-30 to +100°C; 0 to +650°C


±2 °C, ±2 % of m.v.


0.01 to 1

Reflected temperature


testo ε-Assist


Measuring function

Solar mode – manual

Input solar radiation

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 current voltage 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 Wi-Fi 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 Bluetooth/Wi-Fi (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

Charging options

In instrument / charger (optional)

Mains operation


Ambient Condition

Air humidity

20 to 80 %RH non-condensing

Housing protection class




Storage temperature

-30 to +60 °C

Operating temperature

-15 to +50 °C

Physical specification




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

Detecting structural defects and ensuring building quality (also for images of the building shell)

Analysis with a Testo thermal imager is a fast and efficient method of detecting possible structural defects. Furthermore, Testo thermal imagers are ideally suited for providing proof of the quality and correct implementation of construction measures. Any heat losses, humidity and lack of air tightness in a building are visible in the thermal image. The Testo thermal imager makes it possible to detect faulty thermal insulation and structural damage – all using a non-contact method! The testo ScaleAssist function, which automatically ensures optimum setting of the thermal image scale, means you get objectively comparable thermal images of buildings. This makes correct assessment of structural defects and thermal bridges easier than ever before. Finding insulation defects and thermal bridges in the building shell is one of the typical applications.

Preventing mould growth

Thermal bridges waste energy. Condensation can also form in these places due to humidity in the ambient air. As a result, mould forms in these locations with the associated health risks for the occupants. The thermal imager uses the externally determined ambient temperature and humidity, along with the measured surface temperature (e.g. via the optional radio humidity probe), to calculate the relative surface moisture value for each measuring point directly in the instrument. Mould formation is therefore visible on the display before it becomes visible to the naked eye: areas at risk are displayed in red, those not at risk in green. This makes it possible to introduce measures to prevent dangerous mould formation at an early stage - including in hidden corners and alcoves.

Support in preventive maintenance

Reliable early detection of damage to production-relevant systems is essential in order to guarantee the safety and reliability of the system and prevent costly downtimes. Problematic areas in electrical and mechanical production facilities usually become evident due to an increase in temperature of the affected components. You can use a thermal imager to detect critical heat conditions (known as hotspots) in your system directly during operation, therefore guaranteeing an additional bonus in terms of reliability. Typical applications for the thermal imager:
  • Quick location of hotspots in electrical installations
  • Detection of critical heat conditions in engines, shafts and bearings

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