T-82K

Exhaust gas temperature measurement through T-82K

The operating principle is based on thermoelectromotive force generated by the chromel-alumel thermocouple junction when heated by exhaust gases. As gas temperature rises, the thermoelectric voltage changes and the connected indicator displays the corresponding temperature value. In the TST-282 system, the signal can be used by a magnetoelectric indicator without a separate external power source for measurement. Correct indication depends on the thermocouple, compensation wiring, terminal block and indicator condition.

T-82K with TST-2 indicator and connection elements

The thermocouple works as part of the TST-282 / TST-282S temperature measuring set together with the TST-2 indicator, compensation wiring and connection elements. A typical set may include two T-82K or T-82S thermocouples, depending on the configuration. The thermocouple leads are connected through heat-resistant wires with tips to the terminal block or associated connection hardware. Poor contact, damaged insulation or incorrect polarity of thermocouple wires can lead to wrong temperature readings.

Aircraft application of T-82K

T-82K is used for direct measurement of exhaust gas temperature in aircraft engines and auxiliary power units. One typical application is the AI-9V auxiliary power unit, where exhaust gas temperature must be monitored during start and operation. The thermocouple may also be used in systems installed on helicopters and aircraft equipped with TST-282 or TST-282S temperature indication equipment. Exact applicability depends on the engine, APU type, temperature set version and aircraft maintenance documentation.

Identification and ordering of T-82K

Before ordering, the full thermocouple designation should be checked against the aircraft parts catalog, engine documentation or TST-282 set passport. Similar thermocouples may differ by mounting flange, wire length, head dimensions, terminal type and permitted temperature range. For correct selection, provide the aircraft type, engine or APU type, installed temperature measuring set, required quantity and a photo of the existing thermocouple or passport entry. The product is also known under alternative designations T-82K, T-82S and Т-82К.