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Testo 865 – Thermal Imager (160 x 120 pixels).


1 in stock

  • 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

104,999.00  156,999.00 

1 in stock


Product Description

The testo 865 thermal imager focusses on features required for a contractor’s daily job while providing professional technology. A user-friendly thermal imager designed for quick and effective work, the testo 865. You will always produce the ideal infrared image thanks to the testo ScaleAssist functions, which ensure optimal configuration of the thermal image scale for building thermography, and the IFOV warner, which ensures you prevent measurement errors.

Areas of application of the testo 865 thermal imager
Find thermal bridges, locate overheated connections, find leaks, or locate structural flaws. The testo 865 thermal imager is perfect for use in daily installation and maintenance tasks in business and industry. It makes it possible to speed up quality assurance and guarantee accurate production control.

Technical highlights of the testo 865 thermal imager

The testo 865 thermal imager distinguishes out for its simple operation and remarkable technical characteristics, which include:

High resolution results in very good image quality, with 19,200 temperature measuring points ensuring accurate thermography. 160 x 120 infrared resolution with 320 x 240 infrared resolution thanks to integrated SuperResolution Technology
Visualize temperature variations starting at 0.1°C.
Automatic hot-cold spot detection allows for the direct presentation of critical temperature conditions.

You eliminate measurement errors since the camera shows you exactly what you can measure thanks to the IFOV Warner, which means the distance from the measurement item / measurement spot size is calculated and the measurement spot is shown on the thermal image.
In order to produce objectively comparable and error-free thermal images, such as those showing how buildings behave in terms of thermal insulation, the testo ScaleAssist automatically ensures that the thermal image scale is set to the best possible level.
professional computer programmes for evaluating images
JPEGs are an option for saving thermal photos.

Technical data

Standards and warranty


EMC: 2014/30/EU; RED: 2014/53/EU

Infrared image output

Infrared resolution

160 x 120 pixels

Thermal sensitivity

<0.08 °C (80 mK)

Field of view

31° x 23°

Minimum focus distance

<0.5 m

Geometric resolution (IFOV)

3.4 mrad


320 x 240 pixels


2.1 mrad

Image refresh rate

9 Hz


Fixed focus

Spectral range

7.5 to 14 µm

Image presentation

Display type

8.9 cm (3.5") TFT, QVGA (320 x 240 pixels)

Display option

IR image only


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


Measuring range

-20 to +280 °C


±2 °C, ±2 % of mv


0.01 to 1

Reflected temperature


Measuring function

Analysis function

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

IFOV warner


testo ScaleAssist


Imager equipment

Full screen mode


JPEG storage


Video streaming

via USB

Standard lens

31° x 23°

Digital camera



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

Operating time

4.0 h

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

Product-/housing material



510 g


219 x 96 x 95 mm

PC software

System requirements

Windows 10; Windows® 8.1

General technical data

Product colour


Display ligthing

bright / normal / dark


Preventive maintenance

Ideal for the early identification of imminent malfunctions or defects on plants and machines: Reliably record temperature increases with a thermal imager.

  • Fast detection of critical thermal status (so-called HotSpots) during continuing operation
  • Avoid expensive damage, downtimes and fire risks on plants and machines
Electrical maintenance
  • Test switching cabinets, electrical conditions, photovoltaic plants
  • Evaluate heat status in low, medium and high voltage plants
Mechanical maintenance
  • Identify wear on machines
  • Test motors, bearings, shafts

Detecting structural defects and ensuring construction quality

  • Detect potential building defects, prove quality and the implementation of construction measures without contact – with the help of thermal images
  • Test air-tightness of windows and doors
  • Locate insulation errors and cold bridges in a building shell
  • Detect and visualize mould-risk areas

Easy checking of heating systems and installations

  • test heating and air conditioning/ventilation systems: Use a thermal imager to identify irregularities in the temperature distribution quickly and easily
  • Localization of the course of heating loops in underfloor heating systems
  • Testo radiators for silting
  • Measure flow and return temperatures

Localize pipe ruptures

  • Reliably determine pipe ruptures with the help of a thermal imager – without unnecessarily opening walls and floors
  • Precise localization of leakages in underfloor heating and other inaccessible pipe systems

Locating leaks in flat roofs

  • Detection of damp in roofs: Based on temperature differences (such as occur mainly in flat roofs), thermal imagers show areas on the roof with sealed-in moisture or damaged insulation


Datasheet : Testo 865 – Thermal Imager (160 x 120 pixels).

Instruction Manual : Testo 865 – Thermal Imager (160 x 120 pixels).

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.