The Roto-Bin-Dicato is the most universal of all level sensing technologies and is the most popular level switch used in dry bulk materials. The Roto-Bin-Dicator is a rotating paddle type, bulk material level sensor offered in a wide variety of paddle options for unequaled application versatility. It is easy to install and requires no special tools or calibration.
Featores:
· No Calibration Required
· High or Low Level Alarm Switch
· Top,Bottom, or Side Mount
· 1 or 2 SPDT Switches
· Explosion Proof ＆Stainless Steel Enclosures Available
· Special Motor Design Allows power to be applied all the time, producing heat and eliminating condensation
How the Roto-Bin-Dicator works:
The Roto-Bin-Dicator incorporates a low torque,slow speed synchronous motor [A].The motor rotates a paddle [B]  which is extended into the bin.
As the material builds up to the Roto-Bin-Dicator, the paddle is stopped, which in turn stalls the motor. As the motor stalls, it actuates switches [C].
The torque of  the motor, while stalled, serves to keep the switches actuated while the paddle rotation is stopped by the presence of bulk material.
The switches in the Roto-Bin-Dicator serve to energize audible and visual signal systems and /or stop and start machinery such as conveyors, elevators, feeders,etc.