4-20mA output PT100 Temperature transducer for 24VDC
Working Principle
The resistance of a PT100 thermal resistor changes with temperature: as the temperature rises, the resistance increases, and vice versa. The measurement circuit inside the transmitter, such as a Wheatstone bridge or constant current circuit, measures the resistance value of the PT100. Since the resistance-temperature relationship of a PT100 is not perfectly linear, the microprocessor or dedicated chip built into the transmitter linearizes the signal according to standard calibration tables. At the same time, it compensates for drift caused by the influence of ambient temperature on its electronic components, amplifies and conditions the small resistance change signal, and finally outputs a 4-20 mA current signal, a 0-5V/0-10V voltage signal, or digital signals
Product Features
1.High Precision: PT100 itself has high accuracy, reaching Class A (±0.15℃) or Class B (±0.30℃). After being processed by the transmitter, it can provide accurate temperature data for industrial measurements.
2.Wide Temperature Range: It can meet the temperature measurement requirements for various industrial scenarios and special environments.
3.Strong Anti-Interference Capability: Its 4-20mA current output signal has strong anti-interference ability, allowing long-distance transmission and enabling the detection of circuit disconnection through an "active zero" point.
4.Multiple Output Options: Supports both analog and digital signal outputs, meeting the interface requirements of different control systems and facilitating connection with systems such as PLC and DCS.
APPLICATION SCENARIOS
1. Food and Beverages: dairy fermentation tanks, beer pasteurization, juice UHT, CIP circulation pipelines;
2. Pharmaceutical and Biotechnology: water for injection systems, bioreactors, sterilization cabinets, purified water circuits;
3. Fine Chemicals / Cosmetics: sterile ingredient tanks, emulsification tanks, clean pipelines;
4. Industrial Pipelines: non-hot-work rapid temperature measurement points (surface clamp type).
Product detail

Technical Specifications
|
Product Name |
PT100 Temperature transmitter |
|
Input signal |
PT100 |
|
Measuring range |
-50~200℃(Normal temperature) -50~400℃(High temperature) |
|
Output signal |
4-20mA/0-5V/0-10V/1-5V/RS485 |
|
Power supply |
12~24VDC |
|
Probe size |
6*30mm 50mm 100mm 150mm 200mm 250mm 300mm (Special sizes can be customized) |
|
Installation method |
Default: Clamp DN50.5 |
|
Note: |
≤200℃:Normal temperature 200℃~400℃: High temperature |












