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Energy production

Better to play it safe.

For energy and utility companies, security of supply and thus trouble-free operation of the power grid is a top priority.Free of charge and with no obligation.Whether in the generation, transmission or distribution of electrical energy. Whether in the generation, transmission or distribution of electrical energy.

Thermography for reliable power distribution and power generation

Most failures due to malfunction, wear or material fatigue are preceded by thermal anomalies. Thermographic inspection with thermal imagers (infrared thermography) of these anomalies enables reliable and simple assessment of the heating condition of components on high-voltage installations, e.g. transformers, substations and overhead lines.

Preventive maintenance with thermal imagers:

Thermographic measurements using thermal imagers can be carried out during operation and from a safe distance. Critical electrical and mechanical components or connections are tested. In this way, measures can be taken in good time in the event of conspicuous anomalies in order to minimize failure and safety risks.

Power distribution systems

Thermographic inspection – to ensure smooth operation

Assess heating on disconnectors and circuit breakers from a safe distance

This is how it works in practice

Application examples and customer references.

Testing high-voltage plants with thermal imagers from Testo.

Application example

Thermography of distant objects.

Find out more

testo 883 thermal imaging camera demonstrates its versatility at badenovaWÄRMEPLUS GmbH & Co. KG

To the customer reference

Best image quality and exchangeable lenses.

With the thermal imagers from Testo, you won't miss a thing. Thanks to high resolution and manual focus, every thermal image is razor-sharp, and with the exchangeable lenses, you discover every anomaly easily and efficiently, even from greater distances.

Thermal imager testo 883

  • Infrared resolution of 320 x 240 pixels - expandable to 640 x 480 pixels with integrated testo SuperResolution technology

  • Manual focus and telephoto lens

  • Second screen function with testo Thermography App

testo 883 thermal imager

  • Infrared resolution of 640 x 480 pixels - expandable to 1280 x 960 pixels with integrated testo SuperResolution technology

  • Manual focus, autofocus and SuperTele lens

  • Rotatable and tiltable display, ergonomic rotatable grip


IFOV calculator for Testo thermal imagers

The FOV calculator shows you quickly and easily just how small the measurement object can be in order to be detected (IFOV geo) and reliably measured (IFOV meas) at the selected distance.

To the calculator

Smallest recognisable object (IFOVgeo)

Smallest measurable object (IFOVmeas)

Size of the field of view (FOV)



Distance of the thermal imager to the measurement object

Other advantages of Testo thermal imagers

testo IRSoft professional software

Use the testo IRSoft report wizard to generate professional reports quickly and easily – or use the software’s report designer to create customized templates in line with your own personal requirements. The software can be downloaded free of charge and without a licence.

License-free download

testo Thermography App – Be smart and networked

With the testo Thermography App you can quickly and easily share images from your smartphone or tablet with your colleagues

testo Thermography App

Keeping limit values safely in view

The hot spot function immediately displays the hottest spot in the image. In addition, points that exceed defined limits can be highlighted in colour using the alarm function.

Intuitive operation

The clever combination of touch display and the tried-and-tested Testo joystick will make your work processes smoother and more efficient.

Fold-out display and rotatable handle

The rotatable, fold-out display and the ergonomic rotatable handle allow measurements in difficult-to-access places.

Super-telephoto lens

6.6° x 5° super-telephoto lens:

  • Small field of view for maximum resolution

  • Particularly suitable for measurements on objects that are far away, e.g. power lines

  • Easy to handle: no additional lens holder needed

Power generation

Maintenance of mechanical components

Heat generation in mechanical components in power-generating plants may indicate an elevated level of stress. This is caused, for example, by friction, faulty alignment, component tolerances or a lack of lubricant.

The main advantage of infrared measurement: it is non-contact and can therefore be carried out during operation and from a safe distance.

Thermal imagers for reliable power distribution and power generation