Lead wires and cables for temperature sensors transmit electrical signals from sensing elements to control systems.
Lead wires and cables are essential components in temperature sensor assemblies that provide electrical connectivity between the temperature sensing element (such as RTD, thermocouple, or thermistor) and the measurement or control instrumentation. These components must maintain signal integrity while withstanding the environmental conditions of the application, including temperature extremes, chemical exposure, mechanical stress, and electromagnetic interference.
诱因 → 失效模式 → 工程缓解
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Thermocouple extension wire matches the thermocouple alloy composition and is used to extend the sensor to the instrument over longer distances while maintaining accuracy. Compensating cable uses different, less expensive alloys that mimic the thermoelectric properties of the thermocouple within a limited temperature range, typically for connections near ambient conditions.
For temperatures above 200°C, use PTFE, FEP, or ceramic insulation. PTFE handles up to 260°C continuously, while ceramic-insulated wires can withstand over 1000°C. Consider chemical resistance, flexibility, and abrasion resistance alongside temperature rating.
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