Displacer Switches

How Displacer Switches Work

Displacer switch operation relies on a spring loaded with weighted displacers that are heavier than the liquid. As each displacer becomes immersed in the liquid, the change in buoyancy force reduces the net force on the spring. When buoyancy increases to a certain point, it compresses the spring.

A connected magnetic sleeve then moves within a non-magnetic barrier tube, entering the field of a pivoted magnet to actuate the external switch mechanism. Built-in limit stops protect against overextension of the spring during sudden surges in liquid level.

Benefits of Displacer Switch Technology

● High Accuracy: The direct response to buoyancy changes ensures consistent measurement, even with varying liquid densities.
● Durable Construction: Engineered to withstand demanding industrial environments, our robust switches maintain reliable performance over the long term.
● Enhanced Safety: Precise level control helps prevent overfills, costly spills, and potential damage to equipment.
● Low Maintenance: With fewer moving parts and a sealed, non-magnetic barrier, displacer switches require minimal upkeep.

The PROOF-ER® Advantage

The PROOF-ER® Displacer Switch offers a straightforward way to verify the functionality of a displacer control without raising the actual liquid level in your tank. By pulling downward on the PROOF-ER cable, you engage a spring-loaded lever arm that lifts the displacer switch actuator—simulating a high or high/high level condition. Releasing the cable returns the actuator to its normal position, allowing operations to continue without interruption.

● Efficient Testing: Validate your switch’s performance quickly and easily, reducing downtime.
● Versatile Implementation: Useful across a variety of industrial sectors for safer, more reliable operations.

Upgrade Your Level Measurement Strategy

Choose AMETEK’s displacer switches to optimize safety, efficiency, and accuracy in your liquid level measurement processes. Whether you need dependable level detection for critical high/low points or a system you can easily test with PROOF-ER®, our displacer switch solutions help maintain smooth operations and protect valuable assets.