Dwyer Flotect Series V12 FLOTECT® Flow Switch

 Low Cost, Wide Range of Chemical Compatibility, Flow Rates 0.5 to 5.0 GPM

Series V12 Flotect® Flow Switch is a low cost, versatile line of switches that can be used in a wide range of applications and configurations. Mountable in any orientation, the Series V12 Flow Switch utilizes a free moving shuttle that is displaced by the liquid flow, activating an isolated, sealed reed switch. Models can be used in media that is compatible with Noryl® GFN3, stainless steel and ceramic 1. FDA approved materials option has wetted materials of Noryl® GFN3, stainless steel and Teflon®.

Dwyer Flotect Series V12 FLOTECT® Flow Switch
  • Flow Rate Settings of 0.5 to 5.0 GPM
  • Wide Range of Chemical Compatibility
  • Mountable in Any Orientation
  • Low Pressure Drop at Full Flow
  • FDA Approved Wetted Materials Option


Monitoring water and other compatible media flow, especially for the pool and spa industry; protect equipment due to loss of coolant or lubricant flow; process system operation; monitoring of chlorinators, water filtration, reverse osmosis and evaporators.


  • Service: Compatible liquids.
  • Housing and Shuttle: Noryl GFN3 (Polyphenylene Ether and Polystyrene).
  • Spring: 316 SS.
  • Retaining Clip: PH 15-7 MO stainless steel.
  • Magnet: Ceramic 8. FDA option: Teflon®.
  • Temperature Limits: 0 to 194°F (21 to 90°C).
  • Pressure Limit: 100 psig (6.90 bar) @ 70°F (21°C), 50 psig (3.45 bar) @ 194°F (90°C).
  • Switch Type: SPST normally open hermetically sealed reed switch.
  • Electrical Rating: 1.5A @ 24 VDC resistive, 0.001A @ 200 VDC resistive, 0.5A @ 125 VAC.
  • Accuracy: ±20%.
  • Electrical Connection: 22 AWG, 18" (460 mm) long.
  • Process Connection: 1" female NPT.
  • Mounting Orientation: Switch can be installed in any position but the actuation flow rates are based on vertical up flow pipe runs and are nominal values.
  • Set Point Adjustment: None.
  • Weight: 4.2 oz (0.119 kg).
  • Deadband: 20% maximum.
  • Agency Approvals: UL.
  • FDA approved materials option. For applications that require FDA approved materials, wetted materials are Noryl® GFN3, 316 stainless steel, PH 15-7 Mo stainless steel and Teflon®. To order, add suffix “-FDA”.
  • Example: V12-4-FDA.

Popular Models

Switch Activation Set Point on Increasing Flow (Water), Vertical Up Direction - Gallons Per MinuteSwitch Activation Set Point on Increasing Flow (Water), Vertical Up Direction - Liters per Minute
 V12-2 0.5 GPM 1.892
 V12-3 1.0 GPM 3.785
 V12-4 2.5 GPM 9.462
 V12-5 5.0 GPM 18.924

Reference : nciweb.net