The infrared temperature sensor uses the physical properties of infrared light to measure the sensor. Infrared, also known as infrared light, it has reflection, refraction, scattering, interference, absorption and other properties. Any substance, as long as it has a certain temperature (above absolute zero), can radiate infrared light. The infrared temperature sensor does not directly contact with the measured object when measuring, so there is no friction, and it has the advantages of high sensitivity and quick response. More sensor trading, sensor information, sensor wholesale, please pay attention to China sensor trading network http://cgq.99114.com Applicable area 18~32m² High Purification Air Cleaner,Small Air Purifier,Air Purifier For Smoke,Portable Air Purifier For Office Leeyo Pilot Electric Technology Co., Ltd , https://www.leeyopilots.com
The infrared temperature sensor includes an optical system, a detection element, and a conversion circuit. The optical system can be divided into two types, transmissive and reflective, depending on the structure. The detection element can be divided into a thermal detection element and a photoelectric detection element according to the working principle. Thermistors are most often used for thermistors. When the thermistor receives infrared radiation, the temperature rises and the resistance changes (this change may be larger or smaller, because the thermistor can be divided into positive temperature coefficient thermistor and negative temperature coefficient thermistor), Through the conversion circuit becomes electrical signal output. Photodetection elements are commonly used photosensitive elements, usually made of lead sulfide, lead selenide, indium arsenide, gallium arsenide, cadmium telluride mercury ternary alloy, germanium and silicon doping and other materials.
Temperature sensors generally have higher measurement accuracy. Within a certain temperature range, the thermometer can also measure the temperature distribution inside the object. However, for sports objects, small objects or objects with small heat capacity, large measurement errors will occur. Commonly used thermometers include bimetal thermometers, glass liquid thermometers, pressure thermometers, resistance thermometers, thermistors, and thermocouples. They are widely used in industrial, agricultural, commercial and other sectors. People often use these thermometers in everyday life. With the wide application of cryogenic technology in defense engineering, space technology, metallurgy, electronics, food, medicine, and petrochemicals, and the study of superconducting technology, cryogenic thermometers measuring temperatures below 120K have been developed, such as cryogenic gas thermometers, steam Pressure thermometers, acoustic thermometers, paramagnetic salt thermometers, quantum thermometers, low-temperature thermal resistance, and low-temperature thermocouples. Cryogenic thermometers require that the temperature sensing element be small, accurate, reproducible, and stable. The carburizing glass thermal resistance formed by carburizing sintered porous high-silica glass is a temperature sensing element of a low-temperature thermometer and can be used to measure temperatures in the range of 1.6 to 300K.