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We all know that a cable connector must be used at the cable connection, so that the cables can be connected together for normal operation. Common types of cable joints is stainless steel cable gland. If the installation of stainless steel cable joints is not standardized, the resistance at the cable interface may increase, resulting in a great waste of electricity and even a fire hazard. Therefore, the measurement of cable temperature is the safety guarantee for cable operation. Here are three more commonly used cable temperature measurement methods.

1. The rmocouple type temperature measurement

In the case of using stainless steel cable gland, the temperature of the cable can be measured by a thermocouple method. However, it should be noted that the thermocouple transmission signal requires a dedicated compensation line, and the transmission distance cannot be too long. For the case where the cable joints are widely distributed, this temperature measurement method is not recommended. The thermistor is usually a platinum resistance, which uses a three-wire transmission method.

2. Integrated circuit temperature measurement

There are many types of integrated circuit temperature measuring elements. If the current output type component has a relatively large resistance, it is more suitable for long-distance transmission. In general, for components with relatively small volumes, moisture-proof, high-temperature and corrosion-resistant thermally conductive silica gel can be used to seal the connection point to be measured, and the external wiring can be led out by two wires to transmit data.

3. Optical fiber distributed temperature measurement

Among all temperature measurement methods, optical fiber distributed temperature measurement is the most advanced. It uses the reverse Raman scattering temperature effect of the laser pulse transmitted in the optical fiber to complete the measurement of the cable temperature.

For cables using stainless steel cable glands, the temperature of the cable can be detected by thermocouple temperature measurement, integrated circuit temperature measurement or optical fiber distributed temperature measurement, so as to ensure the normal operation of the cable.
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