Structure: Temperature measuring cable is generally composed of multiple components, including sensing elements, wires, insulation materials and outer sheaths. Sensing elements are usually temperature-sensitive materials, such as thermistors, thermocouples, etc. The wires are used to transmit electrical signals, the insulation materials are used to isolate the wires and sensing elements, and the outer sheaths are used to protect the cables from damage by the external environment.
Principle: The working principle of temperature measuring cable is based on the temperature-sensitive nature of the sensing element. When the temperature measuring cable is exposed to an environment with changing temperature, the sensing element will generate a corresponding electrical signal according to the change in temperature. This electrical signal can be transmitted to the monitoring system or instrument through the wire, thereby realizing the measurement and monitoring of temperature.
Specifically, different types of temperature measuring cables use different sensing elements and working principles. For example, thermistor temperature measuring cable uses thermistors as sensing elements, and its resistance value changes with temperature; thermocouple temperature measuring cable uses thermocouples as sensing elements, and the voltage signal generated is proportional to the temperature. According to the characteristics of the sensing element and the design of the temperature measuring cable, temperature measurement with different ranges and accuracies can be achieved. The temperature measuring cable converts temperature changes into electrical signals through sensing elements and transmits them to the monitoring system or instrument through wires to achieve temperature measurement and monitoring.