Gems Sensors FS-500 Series Instruction Bulletin

Ref. Dimensions . . .
3.80"
(96.5 mm)
!

Specifications . . .

Materials
Housing, Bonnet, Shuttle, Shuttle Cap
O-Ring
Spring
Retaining Clip
Operating Pressure, Maximum
Operating Temperature, Maximum
Set Point Accuracy
Set Point Differential
Switch (See "Switch Ratings")
J-Box with 5A Relay
Inlet/Outlet Ports
Electric Termination
Pilot
J-Box
Note: 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 will vary from the stated values. Contact the Factory for further information.
This product is suitable for Class I and Class II applications only, per the requirements of standard EN60730 and
any additional specific requirements for a particular application or medium being sensed. Class I compliance of
metal bodied units requires a ground connection between the metal body and the earthing system of the
Installation. Class I compliance of plastic bodied units in contact with a conductive medium requires that the
medium be effectively earthed so as to provide an earthed barrier between the unit and accessible areas. For
Class III compliance, a supply at safety extra-low voltage (SELV) must be provided. Please consult the Factory
for compliance information on specific part numbers.
Bonnet
Housing
2.00"
(50.8 mm)
1.8"
(45 mm)
1.48"
(37.5 mm)
Polypropylene, Hydrolytically Stable
Glass-Reinforced
®
Viton or Buna N
316 Stainless Steel
PH 15-7 Mo Stainless Steel
100 PSIG @ +70°F
50 PSIG @ +180°F
212°F (100°C)
± 20%
± 20%, Maximum
SPST, N.O.
120-240 VAC or VDC
120 VAC 50/60 Hz
Contacts: 5A-240 VAC Res.
1/3 HP - 120 VAC
5A - 28 VDC Res.
3/4" Female NPT
No. 22 AWG, 24" Zip Cord Lead Wires
6' Cable
Shuttle-Type Flow Switches
Instruction Bulletin No. 170660
Top View
1.32"
(33.5 mm)
! ! ! ! !
Pilot Duty: 20 VA,
FS-500 Series
Typical Wiring Diagram . . .
SPST, N.O. at No Flow
Switch Ratings
Max. Resistive Load
VA Volts Amps AC
0 - 30 .4
120 .17
20
240 .08

Standard Models . . .

Switch Actuation
Part
Number
Increasing Flow
Pilot Duty
170231
0.25 GPM ± 20%
170232
0.50 GPM ± 20%
170233
1.00 GPM ± 20%
170234
2.50 GPM ± 20%
170235
5.00 GPM ± 20%
J-Box w/5A Relay
175901
0.25 GPM ± 20%
175902
0.50 GPM ± 20%
Red
Red
Amps DC
.3
.13
.06
Set Point on