During normal operation (no material present) a synchronous motor rotates the paddle at 1 RPM. When this paddle rotation is impeded by material, surrounding the paddle, motor will stall and cause the Micro-switch to change state. (indicating an alarm or control)
Suitable for powdery producing & processing industries such as plastic, chemical, medical, forage, cement and fertilizer powders.
Also Read: Basics of DP Level Transmitters