If you want to choose a reliable temperature measurement, you need to choose the right temperature instrument, which is the Temperature Sensor. Among the commonly used Temperature Sensors are thermocouples, thermistors, platinum resistance (RTD), and temperature ICs.

The following is an introduction to the relevant characteristics of two types of temperature instruments, thermocouples and thermistors. Thermocouples are generally Temperature Sensors commonly used in temperature measurement. The main benefits of this instrument are its wide temperature range and its adaptability to various atmospheric environments. , Low price and no need for power supply, coupled with cheap price, so it is widely used. Thermocouples are generally composed of two different metal wires connected at one end. When one end of a thermocouple is heated, a potential difference will occur in the thermocouple circuit, and the measured potential difference can be used to calculate the temperature.

The relationship between voltage and temperature is non-linear. Because voltage and temperature are non-linear, it is necessary to use the reference temperature as the second measurement, and use the test equipment software or hardware to process the voltage and temperature in the instrument to convert it. Thermocouple temperature (Tx). In short, thermocouples are * simple and * universal Temperature Sensors, but thermocouples are not suitable for high-precision measurement and applications. Thermistors generally use semiconductor materials, most of which have negative temperature coefficients, that is, the resistance value decreases with increasing temperature. Temperature changes cause large resistance changes, so it is the most sensitive temperature sensor. However, the linearity of the thermistor is extremely poor, and has a great relationship with the production process.