Compared with pyroelectric sensors, thermopiles have more advantages.

First of all, we should understand the difference between them: thermopile is a temperature measuring element. It consists of two or more thermocouples connected in series, and the thermoelectric potentials output by each thermocouple are superimposed on each other. Used to measure tiny temperature difference or average temperature. Pyroelectric is also called thermal stimulation current. When the polymer electret is heated at a certain heating rate, the original "frozen" polarized charge will be released. This phenomenon is called pyroelectricity. After the thermopile sensor is processed into a sensor, it can detect both dynamic signals and static signals, and can accurately measure the temperature. Thermopile infrared detector can be equipped with various lenses and filters, so as to realize the application in temperature measurement, gas composition qualitative/quantitative analysis, medical equipment and other application scenarios. At present, it has been widely used in forehead temperature gun, ear temperature gun, intelligent household appliances, light switch, food temperature detection and other fields!