How do infrared sensors play a key role

  Infrared thermometer belongs to non-contact temperature measurement. It works by using the relationship between the thermal radiation of an object and the temperature of the object. Specifically, the infrared thermometer is composed of an optical system, a photodetector, a signal amplifier, signal processing, and display output.

   The muzzle of the infrared temperature measuring gun has an infrared sensor, that is, a temperature measuring probe, and the infrared radiation signal of the target to be measured is transmitted to the modulator through the optical receiver to filter out the large-area background interference signal, and then the infrared detector passes the infrared The radiation signal is converted into an electrical signal, which is finally converted into the temperature value of the measured target after being corrected by an amplifier and a signal processing circuit and corrected according to a certain algorithm and target emissivity, thereby realizing non-contact detection of human body temperature.

When choose Infrared thermometer sensor, for which points we should do:

Look at the pins

Generally speaking, pyroelectric sensors have three pins, while thermopile sensors have four pins, two pins output voltage, one pin is the resistance of the thermistor inside the sensor, and one pin is grounded of. But the pin is not the only criterion, just as a quick identification method, because there are also fakes of four pins.

 Look at the package
Pyroelectric sensor packaging is more casual, basically in bags and bulk.

The packaging of thermopile sensors, strict manufacturers will have strict requirements, in order to avoid pollution or damage to the filter, lead deformation, squeezed metal shell, usually the following types of packaging.

Look at models