Float switches are a straightforward way to control a pump or valve for fill and drain applications. Getting the configuration right comes down to a few key decisions before you spec the switch.
Two-Point Level Control
A multi-level float switch is wired to a dual level control relay to operate a pump or valve between two set points. Two normally open switches are wired to the input of a level control relay. The output of the relay can be wired in the fill or drain mode. If wired in the fill mode the relay would energize when both floats were in the down position and remain energized until both floats were in the up position. If wired in the drain mode the relay would energize when both floats were in the up position and remain energized until both floats were in the down position.
Key Spec Considerations
- Set point locations: Measure from the top of the tank to each set point. This determines where the fill or drain operation starts and stops.
- Electrical load: Match the level control relay rating to your pump or valve’s voltage and current draw. Level control relays are available in 24,120, or 220VAC and 12VDC.
- Mounting: Multi-Level sensors are typically mounted through a threaded connection in the top of the tank.
Still Have Questions? Call Before You Order
Pump or Valve control applications are often straightforward, but a few situations are worth a quick conversation: tanks with turbulence or liquids with unusual viscosity or density that affect float behavior. We can help confirm the right configuration before you place the order.
LiquidLevel manufactures float switches in a wide range of materials and configurations with no minimum order requirements. Made in the USA, with fast turnaround and a real person available by phone. Browse our float switches or call us to talk through your application.
