Terminal Head

The terminal head is a critical component of a chemical reactor temperature sensor probe that serves as the electrical connection interface. It houses the terminal blocks or connection points where the sensor's signal wires are securely attached, allowing the temperature measurement signal to be transmitted to monitoring or control systems. This component provides environmental protection for the electrical connections and often includes features for cable strain relief and sealing against process conditions. The terminal head is typically constructed from corrosion-resistant stainless steel (316L) or high-temperature plastics such as PEEK or PTFE, with ceramic insulators for electrical isolation. It is designed to meet specific electrical and mechanical parameters, including a rated voltage of 250 V AC, a rated current of 10 A per contact, contact resistance of ≤5 mΩ, insulation resistance of ≥100 MΩ at 500 V DC, and dielectric strength of 1500 V AC for 1 minute. The operating temperature range is -40 to 85 °C, and the ingress protection rating is IP65, ensuring dust-tightness and protection against water jets. The housing material is 316L stainless steel, and the contact material is gold-plated copper for low resistance. The number of poles is configurable from 2 to 8, and the cable entry is M20×1.5 thread size. The weight ranges from 0.15 to 0.3 kg depending on configuration. These specifications are reference values that must be verified with the manufacturer for the specific model and application. The terminal head is an essential part for ensuring reliable signal transmission and protecting electrical connections in harsh chemical processing environments.

The terminal head functions as an electrical junction box for the temperature sensor probe. It contains terminal blocks or screw terminals that establish secure electrical connections between the sensor's internal wiring and external instrumentation cables. The head provides mechanical protection for these connections and typically includes sealing mechanisms (gaskets, O-rings, or potting compounds) to prevent moisture, dust, or chemical ingress that could compromise signal integrity or cause electrical shorts. The design ensures that the electrical connections are isolated and protected, allowing the temperature signal to be transmitted accurately to monitoring or control systems.