The Springer Controls hazardous location switches (previously manufactured by Rowan Controls and Square D) are also known in the industry as oil-immersed switches. They are designed to provide dependable, heavy-duty performance in both indoor and outdoor locations, specifically in areas with dusty, corrosive, or hazardous atmospheric conditions. Their positive action and heavy-duty construction make them suitable for the most rigorous applications. They are dependable under the most extreme operating conditions. The type 675 units are UL certified.