Dwyer Instruments Series L4 Flotect Level switch

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The Series L4 Flotect Level switch operates automatically to indicate tank level. It is suitable for starting or stopping pumps, opening or closing valves, or actuating level alarm signals. A magnetically actuated switching design provides good performance.

There are no bellows, springs or seals to fail. Instead, the free-swinging float attracts a magnet within the solid metal switch body, actuating a snap switch by means of a simple lever arm. The float arm hinge design limits the arm angle to prevent vertical hang-up.

The product is weatherproof, designed to meet NEMA 4 (IP56), and has a leakproof body machined from bar stock. There is a choice of float dependent on maximum pressure and specific gravity. ATEX or IECEx is available as an option.

Electrical assembly can be easily replaced without removing the unit from the installation so that the process does not have to be shut down. There is horizontal installation or optional top-mount vertical installation.

The product can be used for direct pump control for maintaining level or automatic tank dump operations. It controls levels or provides alarms in sumps, scrubber systems, hydropneumatic tanks, low-pressure boilers and various wastewater/sewage treatment processes.