AMETEK 8TR1 Wheelspace Thermocouple – GE OEM 351A3488P023 Replacement – Type K
AMETEK 8TR1 Wheelspace Thermocouples are designed to measure temperature in the wheelspace region of GE gas turbines — the narrow axial gap between the rotating turbine wheel (buckets) and the stationary diaphragm/nozzle assembly. This zone is shielded from the hot combustion gas path by labyrinth ("angel wing") seals and pressurized with compressor extraction air; a rising wheelspace temperature is an early indicator of seal degradation or hot gas ingestion that can damage rotor discs and stationary hardware if left unaddressed.
AMETEK Power Instruments manufactures these thermocouples to OEM-qualified design standards for direct replacement and retrofit on GE heavy-duty frame and aeroderivative gas turbines.
Technical Specifications
| Sensor Type | Wheelspace Thermocouple |
| Thermocouple Type | Type K |
| AMETEK Series | 8TR1 (8TR1AAK1) |
| GE OEM Replacement P/N | 351A3488P023 |
| Probe Length | 19 ft (approx. 920mm insertion length) |
| Temperature Range | 200 to 2,300°F |
| Sheath Material | Stainless Steel |
| Reference Standard | BSI VS 4937-4 |
Specific GE frame model not independently confirmed — please confirm against your unit's GE drawing or existing part tag when requesting a quote.
Cross-Reference
Functionally equivalent to OEM-spec wheelspace thermocouples offered by Conax Technologies and Temp-Pro for the same GE heavy-duty and aeroderivative wheelspace monitoring locations. AMETEK Power Instruments is a long-established qualified manufacturer of GE turbine instrumentation, supplying direct replacement and retrofit thermocouples built to OEM design standards.
| Specification | Value |
|---|---|
| Sensor Type | Wheelspace Thermocouple |
| Thermocouple Type | Type K |