BinMaster GRMP Rotary Bin Level Indicator

A BinMaster GRMP series rotary paddle bin level switches are the most common point level indicator. It detects high, mid and low levels of material in bins, tanks, and silos. The rotary paddle switch is used for point level detection in powders, pellets, and granular materials with a bulk density of 2 pounds to over 100 pounds per cubic foot.

They are installed in bins and silos for overfill prevention and to eliminate material outages that could interrupt a process. Other uses include plugged chute detection and conveyor overloading prevention. Rotary level indicators wire to a horn, alarm, or light panel. They send an alert when a relay switch activates when material covers or falls away from the paddle.

For high level applications, the rotary is mounted on the roof of the bin or near the top of the bin wall. While the bin is being filled, the paddle continually rotates until material reaches it. The paddle stops turning when it senses resistance. The motor rotates an actuator arm that activates a relay switch wired to an alarm, light, or process equipment to prevent overfilling.

For low level indication the rotary is mounted in the cone of the bin or near the bottom of the bin wall. While the paddle is covered, the rotary motor is de-energized, and the paddle stops rotating. As material drops below the paddle, the actuator arm springs back, the motor re-energizes, and the paddle rotates, to indicate a low-level alert status or start up a process system.

BinMaster’s standard and fail-safe rotaries can be customized with a wide assortment of paddles, mounting plates, and extensions. Mounting plates are available in carbon steel or stainless steel. A compact mini rotary is ideal for constrained spaces.


  •  Air: NA
  •  Electrical: TBD
BinMaster Rotary Level Iindicator

BinMaster GRMP Bin Level Sensor

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