The thermal resistance PT100 PT1000 temperature sensor may be affected by electromagnetic interference under specific conditions. The following is a detailed analysis of this issue:

1、 Basic characteristics of PT100 PT1000 temperature probe

The working principle of PT100 PT1000 temperature sensor is based on the temperature characteristics of platinum resistance, that is, the resistance value of platinum resistance is linearly related to temperature.

This temperature sensor has the characteristics of high precision, high reliability, and wide measurement range, and is usually used for temperature measurement and control in various industrial fields.

2、 The Influence of Electromagnetic Interference on Thermistor Temperature Probes

Electric field interference: The tangential electric field in the high-voltage line electric field may affect the internal circuit of the PT100/PT1000 temperature probe, generating some current and leading to measurement errors.

Magnetic field interference: The magnetic flux in the high-voltage line magnetic field may also affect the internal circuit of the PT100/PT1000 temperature probe, generating interference signals,This can lead to temperature measurement errors.

Coupling interference: In complex industrial environments, the signal lines of PT100/PT1000 temperature probes may experience coupling interference with other devices or cables,Affects the accuracy of temperature measurement. For example, whenPT100 /PT1000When the signal line of the temperature probe is laid in the same cable tray as the high-voltage cable,The electromagnetic field generated by strong electrical cables may couple withPT100 /PT1000The signal line may cause fluctuations or abnormalities in temperature measurement values.

3、 Measures to reduce electromagnetic interference

Using shielding equipment: Adding shielding devices around the PT100/PT1000 temperature probe can effectively reduce the interference of electromagnetic radiation on the temperature probe.

Correctly set up cables: When setting up the signal line for PT100/PT1000 temperature probes, shielded wires should be used and laid separately from strong electrical cables as much as possible to avoid coupling interference.

Reliable grounding: Ensure that the signal line shielding layer end of the PT1000 temperature probe is reliably grounded to eliminate interference signals in the coupling circuit.

4、 Conclusion

PT100/PT1000 temperature probes may be affected by electromagnetic interference in complex electromagnetic environments. To reduce the impact of such interference on measurement accuracy, corresponding mitigation measures can be taken, such as installing shielding devices, correctly laying cables, and reliable grounding.

In practical applications, appropriate measures should be selected based on specific environmental conditions and measurement requirements to ensure the measurement accuracy and stability of PT100/PT1000 temperature probes.