XT-411 - Defender® Explosion-Proof Thermostat Explosion-Proof Thermostat

Ruffneck™ Defender® XT-411 is engineered for use in the most demanding applications such as drilling rigs, utilidors and compression stations where high vibration, dirt, moisture, fluctuating power and high impact conditions exist. It is considered the most robust and trouble free thermostat in the market due to its solid construction. The thermostat is for heating only and is suitable for ventilation systems in demanding industrial applications. It is designed for use in hazardous locations where specific explosive gases or dusts are present. The Ruffneck™ Defender® XT-411 is the only available explosion-proof thermostat for line voltage or pilot duty for up to 600 VAC.


  • Certified for use in hazardous locations
  • Designed for use in the most demanding applications where explosive substances may be present
  • Single pole, single throw for heating applications
  • Compatible with all Ruffneck™ FX5 and FX5-SD heaters


all-aluminum exterior
no breakable external plastic parts
no exposed copper or brass
corrosion-resistant; suitable for H2S environments
CFC & mercury free; environmentally safe, no leveling required
precision die-cast components
sensing bulb is protected by a sturdy thermowell
impact resistant and will not loose its calibration set point
suitable for high vibration installations
temperature range of 40°F to 90°F (5°C to 30°C)
600 VAC maximum
compact and lightweight
3-year warranty; longest trouble-free warranty in the industry
cULus listed