Adjustable deadband combined with direct 2-1/2" threaded or 2-1/2" flange mount makes the reliable, heavy duty 500 Series ideal for liquid level control in large or small tanks. Chambers are available in cast iron, cast steel or cast 316 stainless steel to meet the most demanding application. Float rods are available from the standard 6" (152.4 mm) up to 24" (610 mm) long providing action down to a specific gravity of 0.55. 2-1/2" (64 mm) float is suitable for pressure of 400 psig (28 bar), 2-1/2" x 4" (64 x 102 mm) float is suitable for 200 psig (14 bar). Maximum operating temperature is 425°F (218°C). A variety of circuits can be ordered including SPST, SPDT or DPDT with hermetically sealed snap action or mercury contacts. Single pole, double throw electrically independent circuits are available as well as contact for high or low DC current applications. A full range of enclosures are available such as general purpose, weatherproof, explosion-proof or explosion-proof/vapor proof.