Monitor Rotary Paddle Level Switch

Monitor's line of rotary paddle bin monitors consists of the most reliable, rugged and economical point level control sensors available for detection of dry bulk materials. These easy to install units are proven performers in a wide variety of bulk materials. Monitor's paddle units can be used to eliminate bin overflow, maintain a predetermined material level, indicate plugging of conveyors and pneumatic lines or provide any of a number of level control functions. Unlike many other available paddle units, Monitor's paddle level indicators incorporate a feature that automatically shuts off the motor of the unit when the paddle is in a stalled position, which both extends the life of the motor and minimizes maintenance.

Principle of Operation

The operation of Monitor's paddle level control products is quite simple. The unit is installed through the wall of the vessel, so that the paddle protrudes inside the vessel. A small electric motor drives a paddle, which rotates freely in the absence of material.

When the paddle is impeded by material, the motor rotates within the housing, which triggers two switches. The first switch is a ?dry? electrical contact closure that is available to control a process function or alarm circuit. The second switch cuts the power to the motor, preventing a locked rotor condition, thus extending motor life. This also activates the signalling device, which is wired through that same motor switch. When the material level drops, the loaded stretched tension spring returns the motor to its original running position and the unit is reactivated.

Applications

Monitor?s rugged, reliable design makes the paddle units compatible with many granular, palletised and powder bulk applications. Monitor paddle units can be used for high level indication of materials over 160 kg/m(3) and for low and intermediate level indication for materials over 80 kg/m(3). Monitor paddle units can be installed almost anywhere dry bulk materials are stored, including bins, hoppers, silos and tanks. Monitor?s KA unit is the most popular of our paddle bin monitors. This model is ideal for use in standard applications with a wide variety of materials.

Options

Monitor Rotary Paddle Switches come with many options for both High and Low level applications.  Rotary Paddle switches come in 204VAC, 110VAC, 48VAC, 24VAC, 24VDC & 12VDC.  For High-level applications mounted on top of the vessel, there is a variety of guard extensions, starting at 300mm with standard lengths of 450mm, 600mm, 700mm (cement), 1000mm and 1500mm with customer defined lengths available by request.

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