FineTek SF Series Paddle Type Flow Switch
When you just need a clear yes-or-no answer to whether a pipe is flowing, the FineTek SF Series paddle flow switch delivers it with a simple, field-adjustable mechanism that works reliably across a wide range of pipe sizes and flow conditions.
How It Works
Flow inside the pipe pushes against the paddle, compressing an internal spring and shifting a magnetic element along with it. With no flow — or an empty pipe — the spring stays fully expanded and the reed switch contact remains open. Once flow deflects the paddle roughly 20° to 30° or more, the magnet moves close enough to the reed switch to close the contact, confirming flow is present.
Key Features
- Field-adjustable paddle length to fit different pipe sizes
- Magnetically activated reed switch output
- Simple mechanical design that’s quick to commission
- Clearly distinguishes between flow, no-flow, and empty pipe conditions
- An economical option for basic flow protection
Applications
- Confirming adequate flow before starting downstream equipment
- Protecting machinery that depends on coolant flow
- Pump-running confirmation and alarm duty
Industries Served
- HVAC chillers
- Petrochemical
- Power generation
- Food processing
