Paddle Level Indicators
Paddle Level Indicators consist of the most reliable, rugged and economical point level control Sensors available for detection of dry bulk materials. These easy to install sensors are proven performers in a wide variety of bulk materials. Paddle switches 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 for bins and silos, 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 paddle level indicator 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 signaling 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.
Features
- unaffected by pressure, temperature, dust, caking, and conductivity of material
- to be used in all areas with potentially explosive atmospheres as well
- versatile and universally applicable
- fantastic price-performance-ratio
- high reliability
- continuous operation without maintenance
- easy installation