The Thermometrics TC-70 through TC-90 series are complete industrial thermocouple assemblies featuring a MGO-PAC thermocouple element in a protective sheath, NPT process connection, and weatherproof or explosion-proof connection head for field wiring. Available in standard and adjustable insertion-depth configurations.
| Model | Name | Fitting Style | Extension | Head Type | Best For |
|---|---|---|---|---|---|
| TC-70 | MGO-PAC Industrial TC — Fixed Head | Fixed ½" NPT (standard) | None | Standard aluminum Form B | General process; fixed insertion depth |
| TC-71 | MGO-PAC Industrial TC — Adjustable Fitting | Adjustable compression fitting | None | Standard aluminum Form B | Variable insertion depth; retrofit applications |
| TC-80 | Industrial TC — Nipple Union Extension | Fixed NPT + nipple-union | 2" to 12" nipple/union | Aluminum or cast iron | Insulated piping; head clearance required |
| TC-90 | Remote Mount Industrial TC | Fixed NPT process connection | Flexible conduit or MIMS extension | Remote-mount head (wall or panel) | High-vibration; high-ambient-temp locations |
| Parameter | Specification |
|---|---|
| TC Types | K, J, T, E, N standard; R, S, B on request |
| Junction Style | Grounded · Ungrounded · Exposed |
| Sheath OD | 1/4" (6.4mm) standard; 3/16" and 3/8" available |
| Sheath Material | 316 SS standard; Inconel 600/625 on request |
| Process Connection | 1/2" NPT standard; 3/4" NPT, BSP, flanged available |
| Insertion Length | 2" to 24" standard; custom to 72" |
| Connection Head | Aluminum Form B (NEMA 4X standard) |
| Head Options | Cast iron (NEMA 4X) · Explosion-proof (NEMA 7/9) · SS |
| Conduit Entry | 1/2" NPT standard; M20 available |
| Transmitter Insert | DIN-rail 4–20mA head-mount transmitter available |
| Temp Range | Process: per TC type; Ambient (head): −40°C to 85°C |
The TC-80 configuration adds a pipe nipple and union between the process connection and connection head, providing clearance over pipe insulation, lagging, or vessel walls. Nipple lengths from 2" to 12" standard, longer on request. Union allows head rotation for conduit alignment in the field.
The TC-90 routes the thermocouple extension cable away from the process nozzle to a remote-mount connection head on a wall or panel. Required when head ambient temperature exceeds transmitter rating, or when vibration levels at the nozzle are incompatible with head-mount electronics.
TC-70 series assemblies arrive ready for installation — no separate element, fitting, or head to source. Single part number covers probe, connection hardware, and wiring head.
UL/CSA-listed explosion-proof connection heads for Class I, Groups B, C, D, Division 1 and Division 2 hazardous locations. Same TC-70 body, swapped head — no change to the process connection.
The TC-70 and TC-80 assemblies accept TC-15 replacement elements. When the sensing element reaches end-of-life or calibration limit, install a new element without disturbing the process connection or conduit run.
The TC-71 adjustable compression fitting accommodates installation in nozzles of varying depth without pre-specifying insertion length. Set insertion depth in the field and lock the compression nut.
Head-mount 4–20mA HART transmitters fit directly inside the Form B connection head, converting the TC signal to a two-wire current loop. Eliminates separate transmitter housing and conduit run.
Certificate of Conformance, material certifications, and NIST-traceable calibration certificates issued with every order. FAIR documentation per AS9102 for aerospace qualification programs.
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