Overview

The temperature transmitter uses thermocouples and resistance thermometers as temperature-sensing elements. The signals output from these sensing elements are sent to the transmitter module, where they undergo a series of circuit processes—including voltage stabilization and filtering, operational amplification, nonlinear correction, V/I conversion, constant-current generation, and reverse-polarity protection—before being converted into a 4–20 mA current signal or a 0–5 V/0–10 V voltage signal that has a linear relationship with temperature. Additionally, it provides an RS485 digital signal output.

Application

A device that converts physical measurement signals or conventional electrical signals into standard electrical signal outputs or outputs capable of being transmitted via communication protocols. A temperature transmitter is an instrument that converts temperature variables into standardized output signals suitable for transmission, primarily used for measuring and controlling temperature parameters in industrial processes. A current transmitter converts the AC current in the measured main circuit into a constant-current loop standard signal, continuously transmitting it to the receiving device.

A temperature-to-current transmitter converts the signal from a temperature sensor into a current signal, which is then connected to a secondary instrument to display the corresponding temperature. For example, in the diagram, if the temperature sensor model is PT100, the function of the temperature-to-current transmitter is to convert the resistance signal into a current signal, which is then fed into the instrument to display the temperature.
 

Performance parameters

　　• Implementation standard: IEC688:1992, QB

　　• Input range: -60℃ to 175℃

　　• Accuracy class: ≤0.5% of F.S.

　　• Total device power consumption: ≤0.5VA

　　• Insulation resistance: ≥20 MΩ (DC 500 V)

　　• Response time: ≤350 ms

　　• Operating environment: -10℃ to 50℃, 20% to 90% relative humidity without condensation

　　• Storage environment: -40℃ to 70℃, 20% to 95% relative humidity without condensation

　　• Isolate and convert the ambient temperature to be measured into a single-channel standard DC voltage or DC current output proportional to the linear scale;

　　• Low power consumption, high reliability;

　　• Excellent anti-interference capability;

　　• Plug-and-play terminal interface, standard rail mounting (35mm);

　　• Small size, external dimensions (mm): 95 (L) × 37 (W) × 32 (H);

A temperature transmitter is an instrument that converts a temperature variable into a standardized output signal suitable for transmission. It is primarily used for measuring and controlling temperature parameters in industrial processes.

A transmitter with a sensor typically consists of two main components: the sensor and the signal converter. The sensor is primarily either a thermocouple or a resistance thermometer; the signal converter mainly comprises a measurement unit, a signal-processing unit, and a conversion unit. (Since the calibration tables for industrial resistance thermometers and thermocouples are standardized, the signal converter—when sold as a standalone product—is also referred to as a transmitter.) Some transmitters include a display unit, while others feature fieldbus functionality.

Technical Parameters

Factory display

Honor Show

Exhibition style