What type of switch is a vane type waterflow switch?

A vane type waterflow switch is classified as a paddle activated switch. This device operates by utilizing a paddle, which is a component that extends into the water flow within the piping system. When water flows in the system with sufficient velocity, it pushes against the paddle. This movement activates the switch, signaling that water is flowing through the pipe, which is critical for alarm systems and monitoring in sprinkler systems.

In sprinkler systems, the functioning of the waterflow switch is crucial as it ensures that if water is flowing, it can trigger alarms or the control panel to take necessary actions, such as notifying building occupants or emergency services. The design of the vane or paddle allows it to respond only when the flow reaches a predetermined level, providing a reliable and accurate means of detecting water movement.

The other types of switches mentioned in the choices serve different functions and operate on distinct principles, making them unsuitable comparisons for a vane type waterflow switch.