Ranco dual pressure controls control high-pressure compressors along with low-pressure cycling or safety functions in HVAC systems. These units are fitted with SPST (single-pole single-throw) type switches, rated at 24 / 240V, for starting or stopping the refrigeration compressors and fans on air-cooled condensers. They feature NEMA 1 enclosure with a non-conductive plastic cover that absorbs vibrations & shocks and a captive cover screw for easy installation. These compact pressure controls further allow universal mounting and are available in 50 and 70 (fixed) psi pressure differential options.