STT170

The core principle of a temperature transmitter is to convert the non-electrical quantity sensed by the temperature sensor (Temperature ) converted to a standard electrical signal 。Connect thermocouple (TC) or RTD (RTD) and other sensors, For thermocouple signals: Performs cold junction compensation (Corrects the effect of cold junction temperature changes ), amplifies the weak thermoelectric voltage, and perform linearization (Because thermoelectric voltage and temperature are nonlinear ) 。For RTD signals: Usually powered by a constant current source, converting its resistance change into a voltage change, Also performs linearization (Because resistance - temperature relationship is nonlinear ) 。The circuit also filters the signal to suppress interference 。The conditioned voltage signal is fed into the voltage /Current conversion circuit (V/I Converter ), accurately converted to industrial standard 4-20mA DC current signal (or other standard signals ) 。The current signal is linearly proportional to the measured temperature range, Strong interference immunity, Suitable for long-distance transmission to the control system 。

The STT170 series smart temperature transmitter provides an economical solution for temperature measurement applications. Compared with direct-wired temperature measurement points, the STT170 series smart temperature transmitter is more accurate, safer and more reliable while reducing wiring costs. The temperature signal output of this transmitter is automatically linearized within the upper and lower limits set by the user. It converts signals from thermocouples, RTDs and other types of temperature sensors in oil and gas, petrochemical, chemical, power and other types of plants and transmits them to the plant monitoring system.