The Cable Float Level Switch provides rugged, mechanical point level detection engineered for automated lift stations, stormwater sumps, water storage reservoirs, and industrial sewage pits.

Dependable Water Automation with the Cable Float Level Switch

Designed for straightforward liquid management, the Cable Float Level Switch activates pump control circuits based on buoyancy deflection. As fluid levels rise or fall, the buoyant polypropylene float body tilts past the switching angle. This motion drives an internal precision-engineered steel ball against a snap-action microswitch, delivering instantaneous electrical contact changeover without intermediate signal converters.

The switch integrates a heavy-duty Single Pole Double Throw (SPDT) contact arrangement, permitting direct configuration for either tank filling (low-level pump cut-in) or sump emptying (high-level pump actuation). Its hermetically sealed construction withstands turbulent flow, floating grease blankets, and harsh municipal effluent environments.

Key Features and Engineering Advantages

• Dual-Action SPDT Circuitry: Offers versatile common, normally open (NO), and normally closed (NC) wiring paths to manage both emptying and filling pump duty cycles.
• Internal Rolling Ball Mechanism: Eliminates volatile mercury switches, utilizing an environmentally compliant steel ball trigger mechanism rated for over 100,000 mechanical switching cycles.
• Adjustable Counterweight: Features a sliding modular ballast weight that allows site technicians to fine-tune the operational switching differential and liquid pivot depth.
• Heavy-Duty IP68 Sealing: Multi-layer injection molding and ultrasonic hermetic welding prevent fluid seepage along the cable entry during deep immersion.
• Chemical-Resistant Polypropylene Body: Resists aggressive sewage gases, dilute alkaline solutions, agricultural runoff, and domestic greywater.

Technical Specifications

Industrial Applications and Process Integration

The Cable Float Level Switch delivers low-maintenance point control across a wide range of utility and commercial pump control topologies:

• Lift pit sewage pumps, effluent collection sumps, and municipal drain stations.
• Dry-run pump protection for borehole submersible pumps, cooling towers, and suction tanks.
• Automated overhead potable water tank filling and ground-level buffer basin replenishment.
• Stormwater attenuation chambers, retention ponds, and industrial wastewater treatment balance tanks.

Frequently Asked Questions

How do you configure the switch between tank filling and sump emptying modes?
The cable float features a 3-wire SPDT contact scheme: Black is common, Brown is normally open (closes on liquid rise for emptying/pump-down duty), and Blue is normally closed (opens on liquid rise for filling/pump-up duty). Unused conductors must be safely isolated.

How is the switching differential adjusted in deep sumps?
The switching deadband is adjusted by moving the sliding counterweight along the cable sheath. Increasing the cable distance between the float bulb and the counterweight expands the level differential between pump start and stop actions.

Can the switch directly trigger a three-phase motor?
No. While the microswitch contact rating handles light single-phase fractional horsepower motors directly, industrial three-phase pumps must always be switched through a magnetic contactor or motor starter relay driven by the float contacts.