Standard MIMS probes are rated for moderate process pressures. For subsea, wellhead, high-pressure reactor, and autoclaving applications requiring pressure ratings to 20,000 PSI, Thermometrics manufactures high-pressure thermocouple and RTD assemblies with heavy-wall sheath, pressure-rated process connections, and redundant sealing.
| Model | Description | Max Pressure | Connection | Application |
|---|---|---|---|---|
| TC-HP-100 | High-Pressure TC — Heavy-Wall MIMS, NPT Threaded | 3,000 PSI (207 bar) | 1/2" NPT heavy-wall body | Pressure vessels, reactors, autoclaves |
| TC-HP-150 | High-Pressure TC — ANSI Flanged | 6,000 PSI (414 bar) @ temp | ANSI 2500# RF or RTJ flange | High-pressure steam, hydrocracker, reformer |
| TC-HP-200 | High-Pressure TC — Metal-Seal Gland | 15,000 PSI (1034 bar) | Double-block metal cone seal | Wellhead, subsurface injection, gas compression |
| TC-HP-300 | Subsea TC/RTD — Wet-Mate Connector | 20,000 PSI (1380 bar) | API 6A / subsea wet-mate | Subsea wellheads, flowlines, manifolds |
| RTD-HP-100 | High-Pressure RTD — Pt100, Heavy-Wall NPT | 3,000 PSI (207 bar) | 1/2" NPT heavy-wall body | Process vessels, heat exchangers |
| RTD-HP-150 | High-Pressure RTD — Pt100, ANSI Flanged | 6,000 PSI | ANSI 1500# / 2500# flange | High-accuracy process measurement |
| Parameter | Specification |
|---|---|
| TC Types Available | K, J, N, T (base metal); R, S (noble metal) |
| RTD Element | Pt100 IEC 60751 Class A or B |
| Sheath Material | 316SS · Inconel 600 · Hastelloy C276 · Titanium Grade 2 |
| Sheath Wall | Heavy-wall drawn tubing; wall thickness per pressure rating |
| Primary Seal | Metal cone (Swagelok/Parker type) or flanged gasket |
| Secondary Seal | PTFE backup packing; available on HP-200 and HP-300 |
| Pressure Rating | To 20,000 PSI — verified by hydrostatic test, certified |
| Temp Range | −200°C to 700°C (sheath and seal material dependent) |
| NACE Compliance | MR0175 / ISO 15156 on request for sour service |
| Testing | Hydrostatic pressure test to 1.5× MAWP, certified |
| Documentation | MTR, hydrostatic cert, C of C; NIST calibration available |
At pressures above 5,000 PSI, elastomeric seals may extrude under thermal cycling. Metal-to-metal cone seals (TC-HP-200 and above) provide a reliable pressure barrier that does not degrade under repeated thermal cycles. All high-pressure assemblies are hydrostatically tested at 150% of the rated MAWP before shipment. Test certificates issued with every unit.
TC-HP-300 subsea assemblies are designed for installation on subsea production trees, flowlines, and manifolds. Wet-mate connector systems allow installation by ROV without breaking the pressure barrier. Depth rating to 3,000m available. Galvanic compatibility analysis performed for all subsea assemblies.
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