Type R2A: Leads with Cement potting and silicone varnish

Cement potting, no lead end disc. Cement potting temperature rating: 1000°F (538°C) Standard fiberglass lead wire temperature rating: 482°F (250°C)

Type W1A: Braid and Leads with Cement potting and silicone varnish

Stainless steel braid over fiberglass leads for abrasion protection, mechanically crimped to the cartridge sheath. Cement potting and silicone varnish, no lead end disc. ➤ Cement potting temperature rating: 1000°F (538°C) ➤ Standard lead wire temperature rating: 482°F (250°C)

Type C3B: Armor Cable and Leads with Cement potting and silicone varnish with SS cable

The armor cable is tack welded or silver brazed to the cartridge sheath. Cement potting and silicone varnish with no lead end disc, stainless steel cable

Type C3D: Welded lead end disc with SS Cable

The armor cable is tack welded or silver brazed to the cartridge sheath. Welded lead end disc, with stainless steel cable

Type MFR

The 16 ga. 304 SS flange is used as a means of securing the cartridge heater in place.

Type IS: Incoloy Sheath



The standard sheath material for all Hi-Density Cartridge Heaters except 1" diameter is 321 stainless steel; standard for 1" diameter is 304 stainless steel. The incoloy sheath option is available on all diameters except 1/8", 5/16", 8 mm and 20 mm.

To assist you in selecting the proper sheath material, corrosion resistant ratings and chemical properties of various heater sheath materials are given in the Engineering Section of the site.

Type DSM: Other Special Sheath Materials

If your application requires a specific alloy sheath material, consult Tempco with your requirements.