Watlow AC Style Mineral Insulated Mini Plug Thermocouple

• Special mineral insulation protects thermocouple form moisture and thermal shock
• Permits operation in high termperature and pressure environments
• Small diameters are ideal when physical space or extremely fast response are critical
• Flexible NACTPAK material allows forming and bending of the thermocouple
• Outer sheath protects wires from oxidation and hostile environments
• Wide range of sheath materials, diameters and calibrations to meet specific requirements

Watlow AC style mineral insulated mini plug thermocouples are fast-responding, durable, and capable of
handling higher temperatures than non-insulated thermocouples.

Watlow AC style mineral insulated mini plug thermocouples are manufactured with XACTPAK®, Watlow’s
trademark for metal-sheathed, mineral insulated (MI) thermocouple material. XACTPAK® responds fast
because the protective metal outer sheath allows the use of smaller diameter thermocouple conductors.
The rock hard compacted MgO insulation further enhances the sensor’s ability to “read” temperature by
transferring heat quickly to the measuring junction.

The XACTPAK® protecting sheath and compacted insulation protects the Watlow AC style mineral insulated
mini plug thermocouple from moisture, thermal shock, high temperatures, and high pressure to allow the
T/C to outperform its bare wire counterparts in most applications.

The Watlow AC style mineral insulated mini plug thermocouple features mineral insulation for performance
and mini plug or jack terminations that can be quickly connected or disconnected. Miniature connectors,
available with thermocouple diameters up to 0.125 in. (3.0mm), can be used in locations where space is
minimal. The miniature plug permits quick connection to portable instrumentation. Besides saving time, the
Watlow AC style mineral insulated mini plug thermocouple offers the advantage of ease of use even by
inexperienced personnel. In addition, color coding per ASTM E 230 specifications will help you easily
determine the calibration.

On all the Watlow AC style mineral insulated mini plug thermocouples (except ASTM E 230 Type R and S),
the pins and contacts are of the same alloy as the thermocouple, resulting in higher accuracy. This technique
eliminates errors due to temperature gradients across the connector. Type R and S connectors have
compensating alloys.

Applications for the Watlow AC Style Mineral Insulated Mini Plug Thermocouple

• Heat treating
• Furnaces/kilns
• Turbines
• Bearing temperature
• Power stations
• Steam generators
• Diesel engines
• Nuclear reactors

• Atomic research
• Jet engines and test cells
• Rocket engines
• Semiconductor manufacturing
• Refineries/oil processing
• Catalytic reformers
• Food Processing