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.