RLI Shaker

Rotary Paddle Level Indicator


The RLI “SHAKER” rotary paddle switch is used to detect high and low levels of bulk granular solids in bins, tanks and silos. It can also be used to detect plug conditions in spouts, where long life and fail-safe detection is required.

Utilizing a unique stepper motor drive, the RLI “SHAKER” 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 RLI “SHAKER” uses fewer mechanical parts compared with standard rotary level indicators. No gearbox or clutch is required as the stepper motor drive is directly coupled to the output shaft and is practically indestructible and cannot be damaged by forced or backwards rotation. Also, an adjustable torque control allows one unit to cover many different densities of material, and provides easy on site calibration without having to change paddles.

RLI Shaker rotary level indicator
Product Features: 
  • Single point rotary level indicator
  • Detects presence or absence of bulk materials using a rotating paddle
  • Shaking action sheds material build up
  • Adjustable torque control
  • Indestructible direct stepper motor drive
  • No clutch or gearbox
  • Fail-safe rotation detection
  • Selection of paddles, extension shafts & mounting plates to suit most applications
Electronics Application: 

Mounting Plates (Top & Side)

Mild steel powder coated mounting flange with 11/4-inch NPT or 1 inch BSP, half or full coupling. Ensures a solid fixing to tanks silos and bins. Suitable for Binswitches, Rotosafes, Autoset .
Supplied complete with weather gasket. (Also available in stainless steel).

  Can the RLI "SHAKER" be side or top mounted?  
  Yes, it can be either top or sided mounted.  
  Does the RLI "SHAKER" have a gearbox or clutch mechanism?  
  No, it uses a stepper motor drive that is directly connected to the output shaft, so there are fewer mechanical parts compared to a standard rotary paddle level indicator.