Discover the ultimate solution for hazardous-location temperature control with Ruffneck™ Defender® XT‑311 and XT‑312 thermostats, engineered for unmatched durability and precision. Experience peace of mind with these compact, explosion-proof thermostats designed to excel in the most demanding industrial environments.

Ruffneck™ Defender® XT‑311 and XT‑312 explosion‑proof heavy‑duty thermostats are the smallest, lightest, and most durable thermostats available. These thermostats are designed to control heating only, cooling only, or ventilation systems in demanding industrial applications. These include oil refineries, petrochemical plants, pulp and paper mills, coal mines, grain elevators, hazardous waste storage facilities, and other hazardous locations where specific explosive gases or dust are present. For hazardous‑location temperature controls, rely on Defender® thermostats for the most dependable and trouble‑free service available. Ruffneck™ Defender® XT‑311 and XT‑312 thermostat’s unique and highly engineered design offers outstanding features and benefits.

Specifications

Temperature range: 36°F to 82°F (2°C to 28°C)
Temperature differential: 2.5 F° (1.5 C°)
Net weight: 2.1 lbs (0.95 kg)
Switching: Snap acting
Conduit opening: ¾” ‑ 14 NPT

Electrical Rating

22 amps Res, 480 Vac Max: ½ HP @ 125 Vac, 1 HP @ 250 Vac
Class I, Division 1 & 2, Groups C & D;
Class II, Division 1, Groups E, F, & G;
Class II, Division 2, Groups F & G;
Class III; Class I, Zones 1 & 2, Groups IIA & IIB

Available in Two Models

XT-311: (Feed‑Through, Single Pole, Single Throw) For heating‑only applications.
XT-312: (Feed‑Through, Single Pole, Double Throw) For heating or cooling/ventilation applications.

Custom Heating Solutions at Your Fingertips

Not finding exactly what you need? Fill out our brief form. Our custom solutions team will contact you to craft the perfect heater tailored to your specific heating requirements. If we don't have it, we'll engineer it.

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Current Lead Time: 5 business days

FX Series Explosion-Proof SPDT Thermostat