The working principle of WRNK wear-resistant thermocouple is based on the Seebeck effect. When two different metal conductors form a closed circuit and there is a temperature difference at both ends, a thermoelectric potential is generated in the circuit, which is a certain function of the temperature difference. By measuring this thermoelectric potential and using a display instrument, it can be converted into the corresponding temperature value.

In practical structure, WRNK wear-resistant thermocouples are drawn from conductors, insulating magnesium oxide layers, and stainless steel protective tubes, and are divided into two types: insulated and shell connected. Among them, the conductor adopts a specific material combination such as nickel chromium copper nickel to ensure stable and quantifiable thermoelectric potential under temperature differences; The insulating magnesium oxide layer not only provides electrical insulation, but also plays a role in thermal conductivity and protection; Stainless steel protective tubes endow thermocouples with the characteristics of wear resistance, high temperature resistance, and mechanical shock resistance, making them suitable for harsh industrial environments.

Precautions for using WRNK wear-resistant thermocouple:

1. Installation points: When connecting cable wires to the corresponding signal conditioner or display device, it is necessary to connect them according to the correct electrode pairing to prevent erroneous signals and affect measurement accuracy. For welding type wear-resistant thermocouples, insulation coating should be applied during installation to avoid burning out. Before connecting cable wires, the remaining cables should be wrapped with tape to reduce interference and electromagnetic wave effects.

2. Disassembly precautions: Protect the wear-resistant head. It is strictly prohibited to strike, collide or vibrate the wear-resistant head to avoid cracks, detachment or fracture of the wear-resistant layer due to mechanical force. When disassembling, special tools (such as wrenches) should be used to operate slowly, avoiding forcibly pulling or twisting the connection between the wear-resistant head and the protective tube.

3. Regular calibration: This high-precision sensor requires regular calibration, which is not only the key to ensuring data reliability, but also a mandatory requirement to comply with industry standards. During the calibration process, technicians will simultaneously inspect the appearance and insulation performance of the sensor (such as insulation resistance at room temperature ≥ 100M Ω). If any damage is found, it can be repaired in a timely manner to avoid measurement failure caused by local damage expansion, indirectly extending the service life of the equipment.