Temperature transmitters have been increasingly used in petroleum, chemical, chemical fiber, textile, rubber, building materials, electric power, metallurgy, medicine, food and other industrial fields of on-site temperature measurement process control, and RTD and thermocouple temperature transmitters are the most commonly used. The temperature transmitter uses thermal resistance and thermocouple as the temperature measurement element, and the output signal from the temperature measuring element is sent to the transmitter module, and after the circuit processing of voltage stabilization filtering, operation amplification, nonlinear correction, V/I conversion, constant current and reverse protection, it is converted into a 4~20mA current signal output with a linear relationship with temperature. The temperature transmitter converts the temperature variable into a standardized output signal that can be transmitted, and converts the AC current of the main circuit under test into a constant current loop standard signal, which is continuously transmitted to the receiving device. RTD temperature transmitters The RTD used in RTD temperature transmitters is made of semiconductor materials, and most of them have a negative temperature coefficient, that is, the resistance value decreases with the increase of temperature. Temperature changes cause large resistance changes, making it the most sensitive temperature transmitter. RTDs are very small in size and respond quickly to temperature changes. However, thermistors require the use of a current source, and their small size makes them extremely sensitive to self-heating errors. RTD measures the absolute temperature on two lines and has good accuracy. RTD temperature transmitters are ideal for current control applications that require fast and sensitive temperature measurements. Thermocouple temperature transmitters Thermocouple temperature transmitters are the most commonly used temperature transmitters for temperature measurement. Its main benefits are a wide temperature range and adaptability to a wide range of atmospheric environments, as well as being robust, inexpensive, without the need for power supply, and the cheapest. However, thermocouples are not suitable for high-precision measurements and applications. If you have any questions about product consultation, product customization, agency, technical inquiry, quotation, etc., please contact Xingyi, 400-600-4496!