The Thermometrics MGO-PAC series comprises direct-immersion thermocouple probes with MgO-insulated, metal-sheathed construction for process temperature measurement in harsh industrial environments. Rigid, hermetically sealed, and available in all standard types and configurations.
Select the configuration that matches your installation requirements. All models are available in Type K, J, T, E, or N. Custom immersion lengths, sheath ODs, and process connections manufactured to print.
| Model | Name | Termination | Process Connection | Sheath OD | Typical Application |
|---|---|---|---|---|---|
| TC-11 | MGO-PAC Immersion Probe — Lead Wire | Flying leads, PTFE or fibreglass insulation | None (bare probe) | 1/16" to 1/4" | OEM integration, portable measurement, lab use |
| TC-12 | MGO-PAC Probe — Miniature Connector | Miniature TC connector (ANSI color-coded) | None (bare probe) | 1/16" to 1/4" | Instruments, analyzers, test & measurement equipment |
| TC-13 | Tube & Wire — Cut-to-Length | Bare conductors, customer-specified length | None | 1/16" to 3/16" | High-volume OEM, custom harness assemblies |
| TC-14 | MGO-PAC Probe — Threaded Fitting & Lead | PTFE or fibreglass lead wire | 1/2" NPT threaded (standard); BSP available | 3/16" to 1/2" | Pipe and vessel immersion, general process |
| TC-15 | Replacement MGO-PAC Element — Spring-Loaded | Bare leads or miniature connector | Hex head for industrial thermowell / assembly | 3/16" standard | Drop-in replacement element for TC-70, TC-80 assemblies |
| Parameter | Specification |
|---|---|
| TC Types | K, J, T, E, N (base metal); R, S, B (noble metal on request) |
| Junction Style | Grounded · Ungrounded (isolated) · Exposed |
| Sheath OD | 1/16" (1.6mm) · 1/8" (3.2mm) · 3/16" (4.8mm) · 1/4" (6.4mm) · custom |
| Sheath Materials | 316 SS (standard) · 304 SS · Inconel 600 · Inconel 625 |
| Insulation | MgO — high-purity grade, per ASTM E585 |
| Tolerance | ASTM E230 Standard · Special Limits available |
| Insulation Resistance | >100 MΩ at 20°C; >1 MΩ at max operating temp |
| Temp Range | −200°C to 1260°C (type and sheath dependent) |
| Lead Wire | PTFE 24 AWG (standard) · Fibreglass · Ceramic-fiber for high-temp |
| Lead Length | 12", 24", 36" standard; custom lengths available |
| Calibration | NIST-traceable certificate available on request |
| Certifications | C of C standard; FAIR per AS9102 available |
Specify: Model number · Thermocouple type · Sheath OD · Sheath material · Insertion length · Junction style · Lead wire type and length · Process connection (TC-14) · Quantity. Standard configurations ship in 1 business day. Call (818) 882-5000 for same-day availability.
High-purity magnesium oxide insulation maintains dielectric strength at operating temperature, compacts tightly during swaging, and allows the sheath to be bent without cracking the insulation layer.
MIMS cable is swaged to final OD during manufacture, cold-working the sheath and compressing the MgO fill to eliminate voids. The result is a rigid, vibration-resistant probe with no loose internal components.
Swaged closed-end tip or TIG-welded end cap provides a hermetic moisture barrier. Critical for applications involving process fluid pressure, wash-down environments, or steam sterilization.
Type K for general purpose up to 1260°C. Type J for reducing atmospheres. Type T for cryogenic and food service. Type N for high-temperature stability. Noble metal Types R and S available for furnace calibration work.
All thermocouple wire is purchased to ASTM E230 tolerances with lot-test certifications. Special limits of error (SLE) — approximately half of standard tolerances — available on Type K, J, T, E, and N for tighter process control.
Certificate of Conformance standard on all orders. Material certifications, calibration certificates, and First Article Inspection Reports (AS9102) available for aerospace and defense programs. No minimum order quantity.
TC-70/TC-80 series — add a connection head to your MGO-PAC probe for field wiring and transmitter mounting.
View TC-70 Series →Bulk MIMS cable cut-to-length, formed, and terminated. Inconel and 316SS sheath, all TC types.
View MIMS →Protect your probe in high-velocity process streams. Matched thermowell bore geometry for all MGO-PAC ODs.
View Thermowells →TC connectors, extension wire, ceramic standoffs, and connection heads to complete your installation.
View Accessories →Talk directly to the engineering team that builds your assemblies. No bots, no call centers.