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Liquid Level Switch for Refrigerant Service Applicatioms

General Information & Features

Rochester liquid-level switches utilize magnetic reed switches hermetically sealed inside capsules. The reed switch is used to trigger solid-state devices at the required point through magnetic actuation by a high-strength drive magnet located in the head of the liquid-level gauge.


Data Sheet

Instruction Sheet - DS-889

Mark Part # Calib. Switch Max Volts Max Amps Max Watts Construction Application
5S248 5248S00778 RH S.P.S.T. 240 VAC AC Only 1.0 inductive 75 Low Amp Triac Medium current circuit


The liquid-level switch shown above is suitable for use with Rochester models M6253 and HM8443:

All standard switch gauges have Senior heads for mounting on a 2 1⁄2" [63, 5 mm] bolt circle, and are furnished complete with four mounting bolts and a mounting gasket. See Rochester brochure, 22 Series Adapters, for the available mating-tank adapters.

UL recognized for refrigeration.

“AC only” switches are intended for AC only as these devices will open circuit only when the voltage cycle passes through zero. For indoor use unless electrical connections are protected from water.

When Ordering Specify:

1. B, D and H.

2. Type of liquid and working pressure.

Note: For installation instructions see DS-889.


*Materials and specifications are subject to change without notice. Pressure ratings subject to change due to temperature and other environmental considerations.