Service: Compatible liquids
and Shuttle: Noryl GFN3 (Polyphenylene Ether and
316 Stainless Steel
Clip: pH 15-7 MO Stainless Steel
Temperature Limits: 0 - 194°F/-21 - 90°C
Pressure Limit: 100 psig/6,90 bar @ 70°F/21°C,
50 psig/3,45 bar @ 194°F/90°C
Type: SPST normally open hermetically sealed
Electrical Rating: 1.5A @ 24 VDC resistive,
0.001A @ 200 VDC resistive, 0.5A @ 125 VAC
Electrical Connections: 22 AWG, 18 in./460 mm
Process Connection: 3/4˝ FNPT
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
Point: 1.0 GPM activation on increasing flow
Weight: 4.2 oz./0,119 kg
Deadband: 20% maximum
Standard units are designed with springs for
positive return of the shuttle at no-flow condition.
This allows the Flow Switch to be mounted in any
orientation, but actuation set points vary from
A periodic check
to confirm actuation/deactuation is recommended. These units
are not field repairable and should be returned to the
factory if service is required.
CAUTION: Mechanical shock or vibration can
cause permanent damage to the reed switch. Take
care to avoid dropping the unit on hard surfaces
or impacting the switch assembly.
Liquid media containing particulate and/or
debris should be filtered to ensure proper
operation of the FS4 Flow Switch.
Teflon® thread tape or sealant to the 3/4” MNPT
pipe threads and install the switch into the
piping system. Thread the Flow Switch onto the
male pipe thread until hand-tight. Tighten pipe
one additional turn. If improper seal results,
continue turning pipe into Flow Switch in
Do Not Exceed 1 Additional Turn.
Connect wiring in accordance with local
Inductive, capacitive, and lamp loads can all
create conditions harmful to the reed switch.
loads can be caused by electromagnetic relays,
electromagnetic solenoids, and electromagnetic counters, all
with inductive components as the circuit load.
loads can be caused by capacitors connected in series with
or parallel to the reed switch. In a closed circuit the
cable length (150 ft./45 meters or more) to the switch can
introduce a capacitance.
loads can be caused by switching lamp filaments, which have
low cold resistance.
addition to these causes, exceeding any of the
maximum electrical ratings can lead to premature or
immediate failure. This includes inrush and surge
currents greater than the maximum switching current.
Use caution when evaluating system loads and