Gems Sensors & Controls FS-150 Specifications
1-3/8"
(34.9 mm) REF.
1/2" NPT
1/4" (6.3 mm)
QUICK CONNECT
TERMINALS
2-5/32"
(54.8 mm) REF.
1-13/64"
(30.5 mm) REF.
1-5/16"
(33.3 mm)
HEX
1-1/16"
(26.9 mm)
HEX
5-29/32"
(139.7 mm)
REF.
7/8"
(22.2 mm)
DIA. REF.
1/2" NPT
0
0
1
1
2
2
3
3 4 5 6 7
4
5
PRESSURE DROP (PSID)
FLOW RATE - GPM
Part No.
129663
Part No. 129660
Part No. 129661
Part No. 129662
Part No.
129665
Part No.
129664
Tests conducted with units in a horizontal position with water at +70°F (21°C).
Data will vary slightly for vertically mounted units.
FS-150 Series – Straight Flow Path with
Low Pressure Drop
Flow Rate Settings: Liquids: 0.5 GPM to 5 GPM
Port Size: 1/2˝ NPT
Primary Construction Material: Polypropylene
Setting Type: Fixed
These slim, inline switches reduce pressure drop to a minimum. They incorporate
a unique, dual-diameter, internal bore and piston configuration to minimize flow
constriction. Liquids are able to smoothly pass around the piston and flow through
the switch with little pressure loss to the down stream line.
Specifications
Wetted Materials
Housing Polypropylene, Hydrolytically Stable, Glass Reinforced
Piston Ryton® -R4, 316 Stainless Steel
O-Ring Viton
Spring 316 Stainless Steel
Operating Pressure, Maximum 200 PSIG (13.8 bar)
@+70°F to +150°F (+21.1°C to 65.5°C)
150 PSIG (10.3 bar)
@+150°F to +212°F (+65.5°C to +100°C)
Operating Temperature 0°F to 212°F (-17.8°C to +100°C)
Set Point Accuracy ±15%
Set Point Differential 20% Maximum
Switch* SPST, 20 VA
Inlet/Outlet Ports 1/2˝ NPT Male
Electrical Termination 1/4˝ Male Quick Connect Terminals (2)
*See “Electrical Data” on Page X-5 for more information.
®
Dimensions
U.L. RECOGNIZED —
FILE NO. E31926
CSA Listed —
File No. LR30200
PISTON TYPE
Patent #
4.996.396
How To Order – Standard Models
Specify Part Number based on flow setting and switch operation.
Flow Settings
GPM
0.5
1.0
2.0
3.0
4.0
5.0
Notes:
1. Flow settings are calibrated using water @ +70°F on increasing flow, with units in a horizontal position
(terminals up).
2. Care should be taken by specifiers to ensure fluid compatibility with the above listed wetted materials.
3. Use of 150 micron filtration is recommended.
– Stock Items.
Normally Open @ No Flow Normally Closed @ No Flow
129660 129666
129661 129667
129662 129668
129663 129669
129664 129670
129665 129671
Part Numbers
Visit www.GemsSensors.com for most current information.
FLOW SWITCHES
Note: Cable output available. Please consult factory.
Pressure Drop - Typical
G-5
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