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Thermal resistance sensor
Thermistor temperature measurement is based on the fact that the resistance value of a metal conductor increases as the temperature increases.
Most of the thermal resistances are made of pure metal materials. Currently, platinum and copper are the most widely used. In addition, thermal resistances such as nickel, manganese and tantalum have been used. Thermistor sensor mainly measures the temperature and temperature-related parameters by using the characteristic that the resistance value changes with temperature. This type of sensor is suitable when the temperature detection accuracy is relatively high. A wide range of thermal resistance materials are platinum, copper, nickel, etc., which have the characteristics of large temperature coefficient of resistance, good linearity, stable performance, wide temperature range, and easy processing. It is used to measure temperatures in the range of -200 ° C to +500 ° C.
  laser sensor
A sensor that uses laser technology for measurement. It consists of a laser, a laser detector and a measuring circuit. The laser sensor is a new type of measuring instrument. Its advantage is that it can realize non-contact long-distance measurement, fast speed, high precision, large measuring range, strong resistance to light and electric interference.
When the laser sensor is in operation, the laser emitting diode is first directed to the target to emit a laser pulse. The laser scatters in all directions after being reflected by the target. Part of the scattered light is returned to the sensor receiver, which is received by the optical system and imaged onto the avalanche photodiode. An avalanche photodiode is an optical sensor with an internal amplification function, so it can detect extremely weak optical signals and convert them into corresponding electrical signals.