testo 865 – Thermal imager (160 x 120 pixels)

SKU 0560 8650 Category
  • Very good image quality: IR resolution of 160 x 120 pixels, via integrated testo SuperResolution Technology 320 x 240 pixels
  • Very good measuring accuracy of ±2°C
  • Visualizing temperature differences from 0.1°C
  • Automatic detection of hot and cold spots

AED 4,539.00


The testo 865 thermal imager offers professional technology and concentrates on functions which are needed in a contractor’s daily work. The testo 865 is a user-friendly thermal imager, optimized for fast and efficient work. With the testo ScaleAssist functions ensuring optimum setting of the thermal image scale for building thermography and the IFOV warner making sure you avoid measurement errors, you will always generate the perfect infrared image.

Areas of application of the testo 865 thermal imager

Detect leaks, identify overheated connections, pinpoint thermal bridges or detect structural defects. The testo 865 thermal imager is ideal for applications in daily maintenance and installation work in trade and industry. It enables time-saving quality assurance and ensures reliable production control.

Technical highlights of the testo 865 thermal imager

The testo 865 thermal imager stands out thanks to its easy operation and has the following impressive technical features:

  • Very good image quality due to high resolution: 19,200 temperature measuring points ensure precise thermography. Infrared resolution of 160 x 120 pixels – via integrated SuperResolution Technology 320 x 240 pixels
  • Visualize temperature differences from 0.1°C
  • Critical temperature conditions are directly displayed via automatic hot-cold spot recognition
  • 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
  • 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
  • Pro software for image evaluation on the PC
  • You can choose to save thermal images as JPEGs

Delivery Scope

testo 865 thermal imager, including USB cable, mains unit, lithium-ion rechargeable battery, IRSoft professional software (free download), commissioning instructions, short instructions, calibration protocol and case.

Technical data


EMC: 2014/30/EU

Infrared image output

Field of view
31° x 23°
Fixed focus
Minimum focus distance
<0.5 m
Geometric resolution (IFOV)
3.4 mrad
Image refresh rate
9 Hz
Infrared resolution
160 x 120 pixels
SuperResolution (IFOV)
2.1 mrad
SuperResolution (Pixel)
320 x 240 pixels
Thermal sensitivity
<0.1 °C (100 mK)
Spectral range
7.5 to 14 µm

Image presentation

4 (iron, rainbow, cold-hot, grey)
Display option
IR image only
Display type
8.9 cm (3.5″) TFT, QVGA (320 x 240 pixels)


±2 °C, ±2 % of mv
0.01 to 1
Measuring range
-20 to +280 °C
Reflected temperature

Measuring function

Analysis function
Mean point measurement, hot/cold-spot recognition, Delta T
IFOV warner
testo ScaleAssist

Imager equipment

Video streaming
via USB
Standard lens
31° x 23°
JPEG storage
Full screen mode
USB 2.0 Micro B

Imager storage

File format image
.bmt; .jpg; export option in .bmp; .jpg; .png; .xls; .csv
Storage device
Internal Memory (2.8 GB)

Power supply

Battery type
Fast-charging, Li-ion battery can be changed on-site
Mains operation
Operating time
4.0 h

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

Product-/housing material
510 g
219 x 96 x 95 mm

PC software

System requirements
Windows® 11 ; Windows® 10; Windows® 8.1

General technical data

Product colour
Display ligthing
bright / normal / dark