How does an infrared thermometer work?

How an infrared measuring device works - background information

The infrared thermometer works without contact and offers decisive advantages over the classic mercury variants.

• Above all, the thermometer offers you the convenience that you can operate it easily without body contact and that it also transmits reliable data. The risk of infection with communicable infectious diseases such as colds is reduced.
• However, the infrared thermometer is not only used in the medical field to determine temperatures, but it is also offers the industry a reliable and safe device when it comes to operating temperatures of motors without contact ascertain.
• The control of thermal seals and heating systems as well as insulation materials can also be carried out with the Device made so that the thermometer a relief in the determination of exact temperatures offers. Hobby hobbyists also take advantage of these advantages, because recording the correct temperatures usually takes less than a second, so that the device also shows its advantages here.
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• The functioning of the thermometer is kept relatively simple. A laser beam is aimed at a target to determine its temperature. Even if the device works without contact, the thermometer and target point should still be close to one another. Because greater distances result in a poorer measuring spot ratio. The laser scatters on the surface, which means that selective temperature detection is not possible, so that the value can deviate from the actual temperature.


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• The laser scatters on the surface, which means that selective temperature detection is not possible, so that the value can deviate from the actual temperature. The wavelengths of the objects to be detected are between 1 µm and 1000 µm and are not visible to the human eye. Due to the optical processing of the wavelengths using a laser, the information about the wavelengths of the object falls into the sensor of the thermometer and is transmitted via the electronics evaluated. You can read and evaluate the temperature on the display.

Finding the right infrared thermometer - important selection criteria

In addition to the possibility of different objects and items regarding to record the temperature, you should select the right device for special purposes when purchasing.

• The emission factor plays a crucial role in how exactly the infrared thermometer works. Because not all surfaces have the same texture. Organic substances such as paper, wood, glass, Plastics and ceramics have a very high radiation intensity, while z. B. bare metals have low emission factors. You should pay attention to your specific objectives when purchasing. Hobby and industrial needs work with infrared thermometers, which offer a button that allows you to set the emissivity of an object and its surface. This makes measurement results more precise and reduces the uncertainty factor when determining the temperature.
• Devices with a calibration input so you can connect a contact temperature probe are also available, so you don't have to compromise on accuracy.
• When purchasing the thermometer, you should ensure that it is easy to use and Emissivity Correction also has a sufficiently large display, this allows you to quickly read the Temperatures.
• Concerning. temperature recording in the private, domestic area for the determination of body heat, you should seek advice on different models in the pharmacy. There you can get a child-friendly model that works as simply and reliably as possible.

You should also inquire on the Internet and at Stiftung Warentest in order to make the best decision for you based on buyer ratings and test results.