Level indicator
August 1st 2010

A new rotary paddle switch from 4B Braime detects high/low levels of bulk granular solids in bins, tanks and silos.

The RLI Shaker can also be used to detect plug conditions in spouts, where long life and failsafe detection is required.

Using a special stepper motor drive, the device rotates clockwise, then counter-clockwise and then shakes to shed any excess material build up. If the paddle rotation is impeded at any time by the bulk material then the electronic circuit provides a signal for level indication or control.

The ATEX-certified RLI Shaker is said to use fewer mechanical parts than standard rotary level indicators. Neither gearbox nor clutch is needed as the stepper motor drive is directly coupled to the output shaft and cannot be damaged by forced or backwards rotation. Adjustable torque control allows one unit to cover many densities of material.

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