Thermal Imager By Testo: Features & Technologies

For those who get things done.

Testo 865 thermal imager
With easy operation for secure and efficient work.

For professionals.


With excellent thermal
sensitivity and versatile
technical systems
such as
Panorama Image Assistant
or SiteRecognition.


With outstanding megapixel quality, folding rotatable display and high-end systems such as the process analysis package with fully radiometric video measurement.

With the patent pending SuperResolution technology, you can capture extremely high-resolution infrared images (up to megapixel quality) with your Testo thermal imager. SuperResolution technology improves the usable, geometric resolution of the thermal imager's infrared image by a factor of 1.6 – with four times as many measuring values.

Testo IRSoft is the powerful PC software for professional thermography analysis. IRSoft allows comprehensive and easy analysis of thermograms on a PC. It is characterised by its clear structure and a particularly high level of user-friendliness.

Using our thermographic humidity measurement, you can detect humidity before it leads to mould formation: Testo thermal imagers assist you in detecting mould and humidity by presenting the surface moisture distribution directly on the thermal imager's display.


For repeated thermal imaging of similar measuring objects, SiteRecognition technology offers immediate recognition of measuring locations. In addition, automatic assignment and archiving of the thermal images to the relevant measuring locations makes regular thermographic measurements or inspection routes considerably more reliable and efficient.

Testo’s new optional process analysis package combines the function of the fully radiometric video measurement with the image sequence capturing directly in the imager. These functionalities allow the user to document and analyse thermal processes efficiently and reliably during a defined period of time.

Panorama image assistent
Taking thermal images of very large properties at close range is often practically impossible. The only way is to take several shots. However, the Testo panorama image assistant is now available to put an end to having to manage, view and compare several images at once. In fact, it allows several individual images to be collated into one overall image.

testo ScaleAssist

testo ScaleAssist

testo ScaleAssist for testo 865, testo 868, testo 871, testo 872.

  • Comparable thermal images
  • Thermal image scale with automatic optimal setting

testo ε-Assist

testo ε-Assist

For accurate thermal images

  • testo ε-Assist automatically sets emissivity (ε)
  • and reflected temperature (RTC)

testo Thermography App

testo Thermography App

Smart and networked work.

  • testo Thermography App
  • for testo 868 / testo 871 / testo 872.



Wireless connection of the thermal imager

  • to the testo 605i thermohygrometer
  • and testo 770-3 clamp meter