testo 869 - Thermal imager

Order-Nr.  0560 8690

  • Clearly recognizable measurement results thanks to an IR resolution of 160 x 120 pixels

  • Easy operation with FixFocus and an intuitive user interface

  • High temperature sensitivity (< 120 mK) for identifying the smallest temperature differences

  • Wide field of vision (34° lens) means the entire measurement object can be checked at a glance

The thtesto 869 thermal imager combines all important and required properties for high-quality thermographic measurement – it is accurate, robust, fast, and reliable. The testo 869 provides high quality thermography at an affordable price, and belongs in every toolbox.

Product Description

The testo 869 thermal imager offers professional technology, and concentrates on functions which are needed in a contractor's daily job. The testo 869 is an easy to operate pro thermal imager, optimized for fast and efficient work.

Areas of application of the thermal imager testo 869

In cooperation with our customers, the testo 869 was optimized for applications in contractors' daily maintenance and installation work. For example, it provides reliable service in the following applications:
  • Detecting leakages
  • Localizing cold bridges
  • Identifying overheated connections

Technical highlights of the testo 869 thermal imager

The testo 869 stands out, thanks to its easy operation and technical features, such as:
  • High resolution for very good image quality:
    19,220 temperature measurement points for precise and accurate measurement results – infrared resolution 160x120 pixels
  • Visualize small temperature differences:
    the thermal sensitivity is smaller than 120 mK
  • Large image section makes for an ideal overview over the temperature distribution of the measurement object:
    focus-free 34° lens ensures a wide field of view
  • Display of critical temperature conditions:
    automatic hot/cold spot recognition.
  • Pro software for image evaluation on the PC
  • Storage of thermal images optionally in JPEG format


Delivery Scope

testo 869 including professional software, USB cable, mains unit, and rechargeable Li-ion battery
Ambient Condition

Operating temperature

5.0° to 122.0 °F / -15 to +50 °C

Storage temperature

-22.0° to 140.0 °F / -30 to +60 °C

Air humidity

20 to 80 %RH non-condensing

Housing protection class




Image presentation

Display type

3.5" LCD with 320 x 240 pixels

Display option

IR image only

Color palettes

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

Imager equipment

Full screen mode


JPEG storage


Standard lens

34° x 26°

Imager storage

File format image

.bmt; .jpg; software export option in .bmp; .jpg; .png; .csv; .xls

Storage device

Internal storage (1.6 GB / >2000 images)

Infrared image output

Spectral range

7.5 to 14 µm

Infrared resolution

160 x 120 pixels

Thermal sensitivity

120 mK

Field of view

34° x 26°

Minimum focus distance

<0.5 m (Fixed focus)

Geometric resolution (IFOV)

3.68 mrad

Image refresh rate

9 Hz


Fixed focus


Measuring range



±3% of reading


0.01 to 1

Reflected temperature


Measuring function

Analysis function

Single center, hot spot, cold spot, single center + hot + cold spots

PC software

System requirements

Windows XP (Service Pack 3); Windows Vista; Windows 7; Windows 8; Windows® 10; interface: USB 2.0

Physical specification


9 x 4 x 4 in. / 219 x 96 x 95 mm


19 oz. / 550 g



Power supply

Battery type

Fast-charging, Li-ion battery can be changed on-site

Operating time

4.0 hr

Charging options

In instrument / USB charger

Power supply


Termovisores garantia




High-quality transport case

Order Number: 0516 8700

$ 224.00
excl. tax

Checking as part of electrical maintenance

In electrical installations or cables, increased temperatures are always an indication of an overload, an imminent malfunction or an existing defect. Testo thermal imagers facilitate evaluation of the heat status of low, medium and high-voltage systems. Thermographic images lead to the early detection of defective components or connections, so that the necessary preventive measures can be introduced in a targeted way. Thermography therefore minimizes dangerous fire risks and prevents costly production downtimes.

Typical applications for the thermal imager:

  • Checking switch cabinets
  • Checking electrical connections
  • Monitoring and checking photovoltaic systems

Detecting structural defects and ensuring construction quality

Analysis with a Testo thermal imager is a fast and efficient method of detecting possible structural defects. Furthermore, Testo thermal imagers are ideal for providing proof of the quality and the correct implementation of construction measures. Any heat losses, humidity and areas of air permeability in a building are visible in the thermal image. The testo 869 thermal imager makes it possible to detect faulty thermal insulation and structural damage – all using a non-contact method!

Typical applications for the thermal imager:

  • Checking the air tightness of windows and doors
  • Finding insulation defects and thermal bridges in the building shell
  • Detecting areas that are prone to mould

Troubleshooting HVAC installations

HVAC technicians save time finding silting blockage points in radiators using Testo thermal images. Thermal imaging helps to diagnose the AC, heating and ventilation systems bearings, pumps, tank levels, heat distribution issues, and find moisture collection points in the ventilation ducts.