Series P2 Flow Switch

Series P2 Flow Switch

Series P1 Brass Flow Switch

Fixed Setpoints, Flow Rates from 0.10 to 1.5 GPM

The Series P1 Brass Flow Switches utilizes a piston-type design for accurate detection of excessive or insufficient flow rates. The switches have preset actuation points from 0.10 to 1.5 GPM for liquid flow.

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Product Applications

  • Industrial cleaning equipment
  • Detecting loss of fluid in hydraulic systems
  • Assuring proper coolant flow in semiconductor processing
Starting at $323.00
Grouped product items
Model Description Availability* Qty Price
P1-013 Brass flow switch, actuation set point 0.50 GPM (1.89 LPM), calibrated for water @ standard conditions. 1-3 days*


Compatible liquids.
Wetted Materials:
Housing: brass; Piston: polysulfone; Spring: 316SS; O-Ring: Fluoroelastomer, Other: Epoxy.
Temperature Limits:
-20 to 225°F (-29 to 107°C).
Pressure Limits:
1000 psig (68.9 bar).
±10% of set point.
Switch Type:
Electrical Rating:
.17 A @ 120 VAC, .08 A @ 240 VAC, .13 A @ 120 VDC, .06 A @ 240 VDC.
Electrical Connection:
18 AWG, 24" (60.96 cm), Polymeric lead wires.
Process Connection:
1/4" female NPT.
Mounting Orientation:
Any position. Set points shown are based on vertical, inlet down position.
Required Filtration:
50 microns or better.
0.66 lb (301 g).


  • Piston-type operation yields accurate detection of low flow rates
  • The piston magnetically actuates a hermetically sealed SPST reed switch

Product Literature


Catalog Pages


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Model Description Availability* Price