Evenly warm a large space with steam and water from your existing boilers. Use indoors where flammable gases, vapors, dust, and fibers are present—they meet Class I, Divisions 1 and 2, Group D; Class II, Divisions 1 and 2, Groups F and G; and Class III, Divisions 1 and 2. Heat output is based on steam at 2 psi.

Control with a line-voltage thermostat (not included).

Use steam from your existing boilers to evenly warm a large space. These heaters are for indoor use where flammable gases, vapors, and dust are present—they have an explosion-proof motor that is UL listed and CSA certified for Class I, Divisions 1 and 2, Group D; and Class II, Divisions 1 and 2, Groups F and G. Heat output is based on steam at 2 psi.

Control with a line-voltage thermostat (not included).

Focus warm air in a specific spot using steam and water from your existing boilers. Use indoors where flammable gases, vapors, dust, and fibers are present—they meet Class I, Divisions 1 and 2, Group D; Class II, Divisions 1 and 2, Groups F and G; and Class III, Divisions 1 and 2. Heat output is based on steam at 2 psi.

Control with a line-voltage thermostat (not included).

With a cable that supplies the same wattage along the entire length, these heaters remain consistent regardless of the surrounding temperature. All require a temperature switch or controller (sold separately) to regulate heat output. They’re often used to maintain liquid temperature and viscosity and provide freeze protection in pipe and tube systems. To prevent burnout, heaters must not be overlapped and must be in full contact with the surface being heated. All have a plastic cable cover for corrosion resistance and durability. They are FM approved for hazardous locations. A power-connection/termination kit (sold separately) is required.

Note: Only install these heaters in accessible locations; do not install them behind walls, underground, or in other difficult-to-access areas. Use fiberglass tape or heat-transfer putty to install them directly on surfaces that are free of dirt, grease, and rough edges. Do not use electrical tape, duct tape, metal bands, or wire. To prevent heat loss and protect heaters from moisture and corrosion, wrap them with fiberglass insulation.

These ETL-listed heaters keep containers warm in areas where hazardous material is present. Also known as heat blankets, they surround drums and totes to heat them up quickly. They’re also insulated with foam or fiberglass to retain heat. They have a built-in thermostat that cycles on and off to keep contents at a set temperature. There's no need to monitor these heaters—since the temperature can’t be changed, there’s no risk of tampering.

Safe to use while measuring temperatures near flammable gases or combustible dust, these probes have an explosion-proof head that’s FM approved. They are stainless steel to resist corroding when immersed in liquids and gases. They can also be used with solids, such as molds and dies, because the stainless steel acts as a shield if they’re hit or bumped. Rated NEMA 4, these probes seal out dust and water from washdowns. A layer of magnesium oxide protects the wiring inside. To adjust the length of the probe for your application, slide the fitting up towards the probe head or down towards the tip. Once it’s in the right spot, tighten the fitting to compress it against the probe, securing it in place.

Pick the thermocouple type that best covers the temperature range you expect your liquid, gas, or solid to be. You should also make sure the thermocouple type you choose is compatible with the device you plan to connect it to. These probes are often used with temperature controllers, thermometers, and other temperature-reading devices. Remove the cap on the head to wire them to your device.

These thermocouples are manufactured to conform to ASTM E230 for accuracy. Accuracy is how far off the reported value is from the actual temperature.