FX Series Explosion-Proof SPST Thermostat

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 seamless operation in the most demanding industrial environments, ensuring safety and efficiency.

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.

Current Lead Time: 5 business days