T-82K

T-82K thermocouple in the TST-282 temperature system

The T-82K is an aircraft thermocouple used in thermoelectric temperature measuring sets of the TST-282 and TST-282S type. It is installed directly in the exhaust gas flow of an aircraft engine or auxiliary power unit and generates a thermoelectric signal proportional to gas temperature. The thermocouple is a sensing element, not a cockpit indicator. Its signal is transmitted to the temperature indicator through the measuring circuit and is used for monitoring engine thermal condition.

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.

Product Type: Aircraft thermocouple / thermoelectric temperature sensor
Function: Direct measurement of aircraft engine exhaust gas temperature
Application / Where Used: Exhaust gas temperature measuring systems of aircraft engines and auxiliary power units
System / Installation Area: TST-282 / TST-282S thermoelectric temperature measuring set
Compatible Equipment: TST-2 temperature indicator, TST-282 / TST-282S set, connection block / terminal hardware
Associated Engines / Equipment: AI-9V auxiliary power unit and other compatible aircraft engine temperature systems
Thermocouple Type: Chromel-alumel, Type K
Nominal Static Characteristic: Type K
Measured Temperature Range: 0 to +1000 °C
Operating Temperature Range: +450 to +1000 °C
Permissible Set Error: ±20 °C in operating range
Thermocouple Measurement Error: ±3 °C, where specified by documentation
Thermal Response Time: Not more than 2.5–4 s
Measured Medium: Aircraft engine exhaust gas flow
Mounting Type: Rigid flange with two mounting holes
Flange Dimensions: 4.0 × 18 × 40 mm
Sensor Head Dimensions: Ø15 × 15 mm
Lead Length: 250 mm
Lead Design: Thermoelectrode wires in heat-resistant braid with terminal tips
Protective Sheath Material: Heat-resistant steel alloy
Operating Mode: Continuous operation
Assigned Service Life: 5 years, including storage period
Environmental Resistance: Vibration-resistant, shock-resistant, resistant to erosion in high-speed hot gas flow
Alternative Designations: T-82K; T-82S; Т-82К; Т-82С
Technical Documentation: Product passport, TST-282 / TST-282S documentation and aircraft engine documentation

All shipments are carried out from our international warehouse in Dubai (UAE), as well as from our partners’ remote warehouses.

In Stock — items available in stock at the Dubai warehouse are dispatched within 5–10 business days after receiving 100% prepayment.

Remote Stock — items available at our partners’ remote warehouses are supplied within an average of 30–45 business days after receiving 100% prepayment.

Pre-Order — made-to-order products are manufactured and delivered within an average of 45–60 business days. Payment terms: 50% advance payment to start production, with the remaining 50% paid before dispatch from the Dubai warehouse after full readiness for shipment.

Returns & Changes (Restocking Fee)
For selected items, a RESTOCKING FEE of 10% may apply in case of return, order cancellation, or changes to the order specifications. This condition applies only to certain products and is confirmed at the order approval stage.

Warranty
All products are covered by a standard 6-month warranty.
Extended warranty is available upon request and is agreed individually; it may affect the final product price.