Starting at $105.28
  • Call for availability



  • Connection head provides superior dust and moisture resistance
  • Eight different head styles are available to meet various application requirements
  • Lugs on covers allow tightening with either a screwdriver or wrench
  • Plastic heads are weather resistant
  • Cast iron heads suitable for demanding high temperatures


Featuring connection heads, the Watlow AR style mineral insulated thermocouple is resistant to dust and moisture, which ensures continuous long term reliability. This is possible because the covers keep the connection to the extension wire clean.

The Watlow AR style mineral insulated thermocouple features connection heads that are designed to mate to a conduit, allowing permanent installation. A variety of head styles are available, including plastic, cast iron, aluminum and explosion proof.

Watlow Mineral Insulated Thermocouples

Watlow mineral insulated thermocouples are fast-responding, durable, and capable of handling higher temperatures.

Watlow mineral insulated 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 outperforms bare wire thermocouples in most applications.

Applications for the Watlow AR Style Mineral Insulated 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