Multiple sensor designs provide you with multiple choices and achieve a balance between performance and reliability. To achieve a more reliable and economical cooling system, selecting the appropriate temperature sensor becomes crucial. The efficient operation of industrial HVAC systems and refrigeration equipment depends on the appropriate temperature of the refrigerant and lubricating oil in different stages of the refrigeration cycle. Based on this consideration, commonly used sensors usually use RTD (pt100 or pt1000) thermistor, because when the thermistor temperature sensor device is exposed to high temperature environments, the higher the temperature, the higher the resistance value it exhibits.

RTD type sensors have high accuracy and good stability. However, due to the vulnerability requirements of their sensing components, they must be separated from the detection medium using a casing. RTD thermal resistors have good durability and can be directly immersed in any non-conductive fluid medium that needs to be tested, and can quickly respond to temperature changes. The output value of RTD thermistor has inherent nonlinear characteristics, so it is necessary to correct the temperature and resistance value of the output. The temperature resistance value correspondence table can be used to output the calibrated resistance temperature curve.

RTD temperature sensors can be installed in HVAC systems or refrigeration equipment. Adopting enclosed thermistor packaging. Thermistors can come into direct contact with the liquid being tested. Including the liquid to be tested, including refrigerant, engine oil or engine oil/refrigerant lotion, etc. The thermal resistance can also be used in any non-conductive fluid. Direct contact with the liquid to be tested enables the thermistor to have a faster and more accurate response.

A closed type thermistor is a device that encapsulates the thermistor inside a probe as the main component of the sensor housing. This solves the problem of shell leakage, but due to the fact that the thermistor is actually encapsulated in an air pocket, wrapped in a metal or plastic shell, it has good insulation and sealing properties by filling magnesium oxide or silicon dioxide into the metal probe and sealing the head with glue.If high precision is required, it is recommended to use the PT1000 four wire system for temperature measurement. The effect is better.

Friends who want to learn more about temperature sensors can contact me for discussion. Xiamen Meifuyi Automation Technology Co., Ltd. welcomes communication and is committed to the temperature and pressure sensor industry.