A distinction is made between two versions:
The flow arriving in the direction of the arrow moves the pendulum with baffle plate and weight against gravity in the direction of flow. The permanent magnet located at the upper end of the pendulum actuates one or two monitor contacts attached to the outside of the system pipe. For pipes > DN 15 to DN 5000. Switching point fixed in the range of 0.1 – 0.35m/s.