The PT100 temperature transmitter is an instrument used to convert the resistance signal of the PT100 platinum resistor into a standard signal output, which is widely applied in the field of industrial temperature measurement.
Working Principle: It takes advantage of the characteristic that the resistance value of the PT100 platinum resistor changes with temperature. The temperature signal is transformed into a resistance signal, and then the internal circuit of the transmitter converts this resistance signal into a standard current or voltage signal, such as 4 - 20mA, 0 - 5V, 0 - 10V, etc. This makes it convenient for long - distance transmission as well as subsequent display, control, and processing.
Product Features
High - precision Measurement: It can accurately measure temperature, providing reliable temperature data for the industrial production process.
Linear Output: It converts the resistance signal of the PT100 into a linear standard signal, facilitating subsequent signal processing and control.
Strong Anti - interference Ability: With advanced circuit design and shielding technology, it can effectively resist electromagnetic interference and ensure stable signal transmission.
Good Stability: It has low temperature drift and high stability, maintaining stable measurement performance under different ambient temperatures.
Multiple Output Forms: It can output standard current signals like 4 - 20mA or voltage signals such as 0 - 5V, 0 - 10V, meeting the input requirements of different devices and systems.
Complete Protection Functions: It is equipped with functions such as reverse - polarity protection of the power supply and sensor fault protection to prevent equipment damage due to incorrect wiring or sensor failures.
The parameters of PT100 temperature transmitters from different manufacturers may vary slightly. The following are the parameters under normal circumstances:
Parameter | Description |
---|---|
Input Signal | PT100 platinum resistor, with a resistance of 100Ω at 0℃ |
Measuring Range | Generally from - 200℃ to + 850℃, and some can be customized for special ranges |
Accuracy Class | Usually 0.2 class, 0.1 class, etc. For example, 0.1 class means the accuracy is ±0.1%FS |
Output Signal | Current signals: 4 - 20mA, 0 - 20mA; Voltage signals: 0 - 5V, 0 - 10V, etc. |
Supply Voltage | Commonly 24VDC, and there are also 12VDC, 15VDC, etc. Generally, it allows a fluctuation range of ±10% or ±30% |
Operating Temperature | Ambient temperature: - 25℃ to + 70℃, and the medium temperature depends on the specific model |
Storage Temperature | Generally from - 40℃ to + 85℃ |
Isolation Withstand Voltage | Usually 2500VDC or higher to ensure electrical isolation between input, output, and power supply |
Response Time | For fast - response types, it can be less than 30ms, and for general types, it may be around 300ms |
Load Capacity | When outputting current, the load resistance generally does not exceed 600Ω; when outputting voltage, the load resistance usually needs to be greater than a certain value, such as 10kΩ |
Protection Level | Commonly IP20, IP65, etc. IP65 indicates dust - proof and waterproof |
Temperature Drift | Generally ±0.01%FS/℃ (within the temperature compensation range) |
Sensor Cable Resistance | Less than 50Ω per wire |