SERIES: Flow Switch-F61 (Standard Flow Rate – SPDT)

The F61 Series Flow Switches are Single- Pole, Double-Throw (SPDT) flow switches used on fluid lines carrying water, ethylene glycol, or other fluids not classified as hazardous.
They can be wired to energize one device and de-energize another device powered from the same source when fluid flow either exceeds or drops below the set flow rate.
The F61MG type flow switches are used for low-energy loads to operate small relays, solenoid valves, and electronic control circuits.
These flow switches have gold-plated contacts for improved electrical performance in low voltage, low current circuits.

59  150x240 f61 Johnson Controls Aluminium Body Flow Switches


  • Stainless steel paddle has three segments for use in pipes from 1 in. to 3 in. (25 mm to 75 mm) diameter.
  • Paddle segments can be removed or trimmed as needed.
  • F61KB-11 and F61MB-1 include a 6 in. (152 mm) paddle for pipes 4 in. to 6 in. (102 mm to 152 mm).
  • Gold-plated contacts on F61MG-1 reduce intermittent contact problems in lowvoltage and low-current circuits.


  • Use on lines carrying water or ethylene glycol.
  • Not for use with hazardous fluids or in hazardous atmospheres.

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