Flow Switch Operation

In the presence of fluid flow controlled movement of the piston actuates an external hermetically sealed reed switch this switch can be used to actuate audible or visual alarms as well as relays or other controls.

Flow switch operation.

Flow switch operating principle is based on a free floating magnetic piston which responds only to the motion of fluids within the line not to static or system pressures. Always turn the spa off before working on it. Flow switch working principle. A flow switch operates by conveying a trip motion relay reed switch paddle to another machine within the system usually a pump.

The trip signal will indicate to the pump to turn on or turn off. The electrical current in a hot tub or spa can cause injury or electrocution. Flow switches are mechanical devices used in controlling the flow of air steam or liquid. Applications include chillers hot water heaters and liquid transfer systems.

Dwyer models provide a complete system for leak detection and feature a selectable no or nc operation.