Magnetrol J52 Refrigerant Level Switches DESCRIPTION The Magnetrol Model J52 refrigerant level switches are float actuated units designed for use on liquids with 0.60 specific gravity and above. They utilize the Magnetrol magnetic principle to assure dependable performance. • Temperatures from -50° to +100° F (-46° to +38° C) • Maximum working pressure to 400 psig (28 bar) • Housing is completely sealed against entrance of moisture, preventing internal frost formation • Conduit seal with 24-inch (610 mm) lead wires prevents entrance of moisture laden air into the switch housing • Float chamber is a welded assembly fabricated from two low carbon steel sections and finished with an epoxy coating • High and low level switch actuation is easily field adjustable between 0.50 and 1.50 inches (13 and 38 mm), factory set for 1.50 • Vibration resistant switch mechanism has been specifically developed to provide reliable and trouble free operation Housing cover seal of Viton® A o-ring is used between housing cover and base to provide an air tight seal Housing base can be rotated 360° Baffle plate provided with the switch mechanism to prevent electrical wiring interference Housing choices of TYPE 4X steel, TYPE 4X/7/9 explosion proof, and TYPE 4 transparent Lexan® Used with most commercial refrigerants including ammonia, freon, methyl chloride and sulphur dioxide Models available for quick shipment, usually within one week after factory receipt of a complete purchase order, through the Expedite Ship Plan (ESP). MODEL SELECTION Housing Optional cryogenic insulation available. See bulletin 41-106.

A permanent magnet © is attached to a pivoted switch actuator and adjustment screw ©. As the float © rises following the liquid level, it raises the attraction sleeve © into the field of the magnet, which then snaps against the non-magnetic enclosing tube ©, actuating the switch ©. The enclosing tube provides a static pressure boundary between the switch mechanism and the process. On falling level, a spring retracts the magnet, deactivating the switch. Actuating Levels NOTE: Actuating levels are factory set for maximum differential between switch actuation. Internal adjustment provided for reduced...