SP-G Series Liquid Flow Switch

Brand: Eletta

Our flow switch SP-G is designed to fit small flow and line sizes. It works on the principle of variable flow area where the alarm switch point can be set at a very low flow and still the switch is capable of handling large flows without creating a large pressure drop.

SP-G comes in dimensions DN15 and DN20. You have the possibility to chose the set point from 1.5 l / min up to 30 l / min. The set point is calibrated from factory but can be changed by exchanging the pressure plate.
SP-G has a mechanical micro-switch. You can install it horizontally or vertically. Another feature is that the outlet can be rotated 90º or 180º with respect to the inlet. 

This gives you good alternatives in places where space is very limited.
  • Rugged and sturdy design
  • Insensitive to magnetic fields
  • Simple and economical installation
  • One adjustable SPDT micro switch for flow alarm
  • Can be mounted horizontally or vertically
  • Pressure up to 100 bar
  • Can be used in any liquid
  • Function based on flow and not affected by the static line pressure



Flow Range

  • 0 – 3.5 m/s. Max. flow limited by pump capacity and acceptable pressure drop.

Alarm Point

  • Min. 1.5 l/min, max. 30 l/min


  • 1 bar - 25 bar

Maximum Temperature

  • Fluid: 90 °C
  • Liquid: -20 °C

Protection Class

  • IP 43 (NEMA 3R) with M16 GR cable gland included.

Wetted Materials

  • Dezincification-resistant brass, stainless steel 316 and PTFE Nitrile (HNBR)/EPDM seals. Optional FPM (Viton)

Enclosure Material

  • Polycarbonate


  • SPDT, 1-pole 2-way connector. In the standard design, the contact surfaces are silver-plated. Max. load 250 V/8 A Nominal, 250 V/10 A Thermal.

Pressure Drop

  • 0.03 bar/1.5 l/min

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