Developed for your measurement tasks. The Testo thermal imagers for maintenance.

Your challenge

Through preventive maintenance, you ensure that machines never come to an unscheduled standstill, that processes run smoothly and that energy costs decrease instead of increasing. You have to do all this as efficiently as possible. How can Testo support you?

  • testo 865
    • testo 865
  • Switch on, point, know more.
  • Infrared resolution 160 x 120 pixels with testo SuperResolution technology 320 x 240 pixels
  • Thermal sensitivity (NETD) of < 0.1 °C (100 mK)
  • Automatic detection of hot and cold spots
  • IFOV warner for displaying the measurement spot size
  • testo 868
    • testo 868
  • Smart and networked thermal imaging.
  • Infrared resolution 160 x 120 pixels with testo SuperResolution technology 320 x 240 pixels
  • With testo Thermography App for on-site analysis and report generation
  • Automatic detection of hot and cold spots
  • IFOV warner for displaying the measurement spot size
  • Integrated 5 MP digital camera
  • testo 871
    • testo 871
  • Smart thermography for professional requirements.
  • Infrared resolution 240 x 180 pixels with testo SuperResolution technology 480 x 360 pixels
  • Thermal sensitivity (NETD) of < 0.08 °C (80 mK)
  • With testo Thermography App for on-site analysis and report generation
  • Automatic detection of hot and cold spots
  • IFOV warner for displaying the measurement spot size
  • Integrated 5 MP digital camera
  • Integration of further measurement parameters via Bluetooth
  • testo 872
    • testo 872
  • Smart thermography with optimum image quality.
  • Infrared resolution 240 x 180 pixels with testo SuperResolution technology 480 x 360 pixels
  • Thermal sensitivity (NETD) of < 0.05 °C (50 mK)
  • With testo Thermography App for on-site analysis and report generation
  • Automatic detection of hot and cold spots
  • IFOV warner for displaying the measurement spot size
  • Integrated 5 MP digital camera
  • Integration of further measurement parameters via Bluetooth
  • Integrated laser marker – also precisely visible as a measuring point in the thermal image

The thermal imager in maintenance: Everything reliably in view

Detect even the smallest defects at an early stage

  • See 4 times more with testo SuperResolution
  • Better thermal images with more details
Standard thermal image: 320 x 240 pixels

testo SuperResolution thermal image: 640 x 480 pixels

  • Uses the natural movement of the hand
  • Assembles five slightly offset images into one image
  • Real temperature values

Available in the image saved in the gallery and in the analysis software testo IRSoft.

Better thermography with ergonomic design and large display

Thermal imagers in pistol design can be conveniently operated with just one hand.
All Testo thermal imagers have a large display with modern tile optics and speed dial button. In the testo 883, also with touchscreen. This means that thermal anomalies can be identified immediately at a glance.

With these assistance functions your thermal images will succeed

The distance assistant

  • Shows which measurement object can be correctly measured at which distance.
  • This ensures that surrounding objects do not falsify the temperature of the measurement object

The laser marker

  • Shows in the imager display exactly the temperature of the spot the laser is currently pointing at
  • Avoids parallax-related measurement errors for more reliability when measuring

The automatic hot and cold spot display

  • Automatic display of the hottest/coldest measurement point
  • Identify thermal anomalies immediately at a glance

Electrical maintenance with thermal imagers

Malfunctions in electrical systems are often heralded by temperature rises. With a thermal imager, you can detect them immediately and plan repairs before costly failures occur.

Your advantages with Testo

A Testo thermal imager integrates the measured values of the testo 770-3 clamp meter, allowing you to see power, current and voltage values in the thermal image.


Thermal heating also usually precedes a fault in high- and medium-voltage systems such as substations and overhead lines.

With an infrared camera, you can detect and evaluate these anomalies to plan maintenance actions before power interruptions occur.

Your advantages with Testo

With the SuperTele lens of our cameras, you can conveniently thermograph measuring points that are difficult to access.

Mechanical maintenance with thermal imagers

For mechanical components, heat generation is a sure indication of:

  • Increasing wear
  • Lack of lubricants
  • Excessive load


You can detect these risk factors with a thermal imager without contact, during operation and from a safe distance.
Tip: Infrared measurement also supports you in filling-level control.

Your advantages with Testo

testo SiteRecognition automatically assigns thermal images to the correct measurement objects. Ideal for inspection tours with many similar measurement objects.


In high-temperature plants in the metal, chemical and building materials industries, thermography is used not only for preventive maintenance but also for product quality control.

Your advantages with Testo

  • Thermal images up to 1200 °C
  • Panorama image assistant for complete images of large installations

Videos: Testo thermal imagers in use

Cables, contactors and fuses: Thermal imagers in electrical maintenance

Shafts, bearings and motors: Thermal imagers in mechanical maintenance