Overview: Industrial thermocouples are used for temperature measurement ranging from -200 to +2315 °C. The sensor and protection tube are directly exposed to the measured temperature, affecting the sensor's lifespan and measurement stability.

Description: Protective fittings for industrial thermometers consist of a protection tube and a termination head. The protection tube houses one or two thermocouples, while the termination head contains a connector block for extension leads, which can be replaced by a two-wire head transmitter. This transmitter converts the thermovoltage signal into a standardized 4...20 mA signal. Various mounting methods are available, including adjustable flanges and welded bushes.

Principle of Operation: A temperature gradient in an electrical conductor generates an electromotive force (e.m.f.). Two materials with different electrothermal characteristics form a thermocouple, with the output being a function of all junction temperatures. The cold junction temperature is used as a reference and compensated for by the transmitter.

Technical Data: Thermocouples conform to DIN IEC 584, class 2, with different types (J, K, S, L) having specific tolerances and temperature ranges. Protection tubes are available in various forms (AM, AMK, AKK, B, D) with specific materials and operating limits.

Termination Head: Made of weatherproof diecast alloy, conforming to DIN 43 729, with protection mode IP 54 or IP 65. It can accommodate one or two head transmitters.

Accessories: Include adjustable flanges, compression fittings, and head transmitters. Specific order numbers are provided for different configurations.

Ordering Structure: Detailed ordering codes are provided for thermocouples, protection tubes, and termination heads, specifying types, covers, and insertion lengths.