R1S/R1F – Low Cost Plastic Paddle Flow Switch

Low cost, compact plastic paddle flow switch with trimmable paddle to fit pipe sizes 25mm to 63mm.


Balanced magnetic paddle mounted perpendicular to the flow and activating a reed switch through the wall of the switch on increase of flow. The return of the paddle is made by magnetic action without the use of a spring. Suitable for corrosive water pools and spas and salination, chlorination and bromination systems.

Recommended mounting position is on horizontal pipes, but can be mounted in any position. For water flow detection on 25 to 63mm diameter pipes. Available with either 1/2″ BSPP or 1/2″NPT male threaded fittings and a choice of 0.5, 1 or 2 metre twin conductor cables.

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Switch rating
1A, 250Vac (Max 70W)
Electrical contact
Wetted parts
PP, Titanium
Electrical connection
0.5, 1 or 2m PVC Cable Options
Max pressure
10 Bar