How to better solve the anti-interference problem of thermocouples?

1. Isolation law
The isolation method is to suspend the thermocouple installation, so that the thermocouple does not come into contact with the refractory bricks on the furnace wall. Insulation is also used to isolate the thermocouple from the support. This method can effectively prevent high-temperature leakage interference.
2. Shielding method
The shielding method is to shield the compensating wire of the thermocouple by threading it inside an iron pipe or other metal shielding material. This can prevent electromagnetic interference and interference from high-voltage electric fields. When using this method, the iron pipes and shielding materials should be well grounded, and the compensating wires should be twisted together.
3. Grounding method
This method involves grounding the measurement circuit and introducing interference into the ground to ensure the measurement accuracy of the instrument. There are two forms of this method:  the thermocouple reference terminal grounded, and the second is the thermocouple measurement terminal grounded.
When using the reference terminal grounding method, one end of the output terminal of the thermocouple (or compensating wire) is grounded through a sufficiently large capacitor (the larger the capacitor, the better if conditions permit). The measurement end grounding method is to ground the measurement end of the thermocouple, which means that a metal wire is led out from the measurement end of the thermocouple and grounded. This method has a good preventive effect on high-temperature leakage interference. When selecting metal wires, high temperature resistant and harmless metal wires should be chosen for thermocouple electrodes.
We should be prepared to prevent interference when using thermocouples. This can make the measurement of our thermocouples more accurate, thus making our work more convenient and effective.
Application of anti-interference
Firstly, avoid strong magnetic fields
Secondly, compensate the wires with shielding
Thirdly, power cables and signal lines should be routed separately to maintain a distance