Paddle switches are the most common way to detect powder and bulk level. This type of switch is installed in the side wall of the vessel from the outside using a flange, or installed on the top of the vessel with an extension pipe. These units incorporate a motor that rotates a paddle inside the vessel. As the material height increases in the vessel covering the paddle, the weight of the material stops the paddle from rotating, turns off the motor, and actuates the switch. When the material level decreases past the paddle, a spring starts the motor again and the switch reverts to its normal state.
The PLS paddle level switch features a magnetic drive that isolates and completely seals the control head from the process and environment preventing material or dust from entering the control head, both reducing maintenance and increasing reliability. Additionally, the magnetic drive creates a non-mechanical slip clutch that prevents damage to the motor and drive mechanism from sudden or excessive loading on the paddle.
DWYER SERIES PLS2 PADDLE LEVEL SWITCH – 3 Sensitivity Settings, Top or Side Mounting
