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    Thermal imagers

    The measuring instrument for every application: there are hardly any measuring instruments that are as versatile as a thermal imager.

    Making temperatures visible with the help of thermography makes your work easier in these applications, among others:

    • In building thermography a Testo thermal camera helps you to detect thermal bridges and structural defects.

    • In heating construction, you can use thermography to check the function of underfloor heating systems or detect leaks non-destructively.

    • In maintenance a thermal camera enables you to see wear before systems fail.

    Would you like to buy a thermal imager?
    You should take the following into consideration:

    • Resolution: at least 160 x 120 pixels

    • Thermal sensitivity

    • Software for analysis and professional reports

    • Easy and intuitive operation

    The thermal imager – your new favourite tool

    Theory, practice, tips and tricks

    Pocket guide thermography

    Download the exclusive application guide for free now.

    To download

    Emission, reflection, transmission

    Measurement spot and measuring distance

    Measuring object and measuring environment

    Sources of error in infrared measurement

    Practical determination of ε and RTC

    And much more ...

    Calculator

    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)

    Width

    Height

    Distance of the thermal imager to the measurement object

    Applications, functions and further information on Testo thermal imaging cameras

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    Precise thermal visualization with powerful features

    Thermal imagers are measuring instruments that allow you to visualize temperatures without physically touching the object.

    Thermal imagers, also known as thermographic cameras or thermal cameras, detect the infrared (IR) radiation emitted by an object and visualize it in real time as a thermogram. This radiation is a form of electromagnetic wave and is invisible to the human eye.

    As a result, thermal imagers provide an efficient, non-contact method of visualizing and analyzing temperature distributions and varying levels of heat. The technical term for this process is thermography.

    Thermal imaging applications

    Thermal imagers are used in a wide range of industries due to their versatility. Applications include:

    How do thermal imagers work?

    Thermal imagers work by capturing the infrared radiation emitted by objects. Simply put, the thermal imager captures this radiation and converts it into an infrared thermal image, where the different temperatures are represented as colour variations.

    How a thermal imager works in detail

    Purchasing criteria for thermal imagers

    Are you thinking of buying a thermal imager? Here's what to look for:

    Thermal sensitivity of less than 120 mK (makes temperature differences of 0.12 °C visible)

    Also known as thermal resolution and measured in millikelvin (mK), this is the smallest temperature difference that the thermal imager can detect.

    Manual focus

    Check that the thermal imager offers manual focus. Manual focus allows more precise adjustment of the focus on the target, which is especially important at varying distances.

    Interchangeable lenses

    Interchangeable lenses greatly increase the versatility of your thermal imager. Wide-angle lenses are ideal for covering large areas from close range, while telephoto lenses are useful for detailed inspection of smaller areas from a greater distance. Make sure the imager offers compatible options for different lens types.

    Interchangeable lenses

    Interchangeable lenses greatly increase the versatility of your thermal imager. Wide-angle lenses are ideal for covering large areas from close range, while telephoto lenses are useful for detailed inspection of smaller areas from a greater distance. Make sure the imager offers compatible options for different lens types.

    Software for analysis and professional reports

    For professional documentation we recommend our special thermography software testo IRSoft. In addition to processing thermal images, it offers many other analysis functions. Find out more here.

    Simple and intuitive operation

    Our products have a simple, intuitive interface, making them easy to use. They are operated via a highly sensitive touchscreen or an ergonomic joystick, providing precise and convenient control.

    Testo thermal imager features

    Purchasing a thermal imager is a wise investment, especially when you choose a thermal imager from Testo. Our instruments are renowned for their exceptional image quality. With a wide range of features, the Testo thermal imager enables the efficient use of infrared thermography for a variety of applications. These versatile features not only improve the quality of the thermal image, but also maximize the ease of use and precision to meet your specific requirements.

    Compare Testo thermal imagers

    Compare the Testo thermal imagers side by side!

    testo 872 thermal imager – A thermographic camera for all tasks

    Smart thermography with the highest image quality – this is what the testo 872 model stands for:

    •  Infrared resolution 320 x 240 pixels (with testo SuperResolution technology 640 x 480 pixels)

    • Integrated digital camera and laser marker

    •  Wireless measurement data transfer from the testo 770-3 clamp meter and testo 605i humidity measuring instrument

    • With testo Thermography App

    Depending on the application, you will still need more measuring instruments for efficient temperature measurement in addition to a thermal camera. We have put together a small selection of our bestsellers for you here.