infrared temperature sensor how it works

infrared temperature sensor working principle

1.Infrared temperature measurement principle

Any object radiates infrared energy outward, and the intensity of the radiation changes with temperature. Infrared thermometers typically use infrared radiation energy having a wavelength in the range of 0.8 μm to 18 μm. An infrared temperature sensor is an optoelectronic sensor that receives infrared radiation and converts it into an electrical signal that is displayed or output temperature via an electronic line amplifier, linearization, signal processing.

2.Maximum distance and size of the point being measured

The size of the target to be measured and the optical characteristics of the infrared thermometer determine the maximum distance between the target and the measuring head. To avoid measurement errors, the target to be measured should be as full as possible to fill the field of view of the probe. Therefore, the measured point should always be smaller than the measured object or at least the same size as the measured target.

3.Lens cleaning

The lens of the instrument must be kept clean to avoid measurement errors or even damage the lens due to dust, smoke, and other contaminants. If the lens is dusty, wipe it with a mirror paper and alcohol.

4.Electromagnetic interference

To prevent electromagnetic interference, please keep the infrared temperature sensor away from the electromagnetic field source (such as motor, motor, high-power cable, etc.) during installation, and add metal bushing if necessary.