• Testo 865 - Thermal Imager
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testo 865 - Thermal Imager

Rp 23,060,000.00
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• 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

The testo 865 thermal imager combines all the important properties required for high-quality thermographic measurement – it is accurate, robust, fast and reliable. The testo 865 provides high-quality thermography at an affordable price and keeps going even in tough working conditions. 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 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/Product specification

Standards and warranty
EU-/EG-guidelines EMC: 2014/30/EU

Infrared image output
Infrared resolution 160 x 120 pixels
Thermal sensitivity <0.1 °C (100 mK)
Field of view 31° x 23°
Minimum focus distance <0.5 m
Geometric resolution (IFOV) 3.4 mrad
SuperResolution (Pixel) 320 x 240 pixels
SuperResolution (IFOV) 2.1 mrad
Image refresh rate 9 Hz
Focus 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
Colours 4 (iron, rainbow, cold-hot, grey)

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

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

Imager equipment
Full screen mode Included
JPEG storage Included
Video streaming via USB
Standard lens 31° x 23°
Interface 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 yes

Ambient Condition
Air humidity 20 to 80 %RH non-condensing
Housing protection class IP54
Vibration 2G
Storage temperature -30 to +60 °C
Operating temperature -15 to +50 °C

Physical specification
Product-/housing material PC - ABS
Weight 510 g
Dimensions 219 x 96 x 95 mm

PC software
System requirements Windows® 10; Windows® 8.1

General technical data
Product colour Black
Display ligthing bright / normal / dark


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
• 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


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



Data sheet testo 865


Instruction manual testo 865 (for devices with Firmware from 1.23x

Instruction manual testo 865 (for devices with Firmware up to 1.14x

Short manual testo 865, 868, 871, 872

EU declaration of conformity testo 865


PC Software testo IRSoft (for all testo thermal imagers)

Instruction Manual IRSoft (for all testo thermal imagers)

Firmware testo 865, testo 868, testo 871, testo 872 (In order to be able to use the PC software optimally, the instrument should also be updated with the latest version of the instrument firmware. Please note: For the Firmware upgrade the current IRSoft is essential). 

Instruction Firmware Update (testo 865, testo 868, testo 871, testo 872, testo 885, testo 890, testo 883