Gems Sensors & Controls FS-927 Data sheet
2-3/4"
(69.9 mm)
1/4" NPT
1"
(25.4 mm)
OUT
1"
(25.4 mm)
1"
(25.4 mm)
IN
5/8"
(15.9 mm)
3/8"
(9.5 mm)
1/4" NPT
G-12a ill
4
2
1
3
0
0 0.5 1.0 1.5 2
FLOW RATE - GPM
PRESSURE DROP (PSID)
Part No. 70823
Part No. 70820
Tests conducted with units in vertical position (lead wires up) with water at
+70°F (21°C).
FS-927 Series – Small Design
for Tight Instrumentation Packages
Flow Rate Settings: 0.10 GPM to 1.50 GPM
Port Size: 1/4˝ NPT
Primary Construction Material: Brass, Stainless Steel
Setting Type: Fixed
Measuring only 1˝ x 2-3/4˝, these compact switches are ideal for use where space
is at a premium. Designed for use with water and oil, these switches are suitable for
high volume OEM applications. They are ideal for coolant or lubricant flow monitoring
in portable equipment and many other applications with space constraints.
Specifications
Wetted Materials
Housing and Piston Brass, Stainless Steel
Spring 316 Stainless Steel
Other Wetted Parts Stainless Steel
Operating Pressure, Maximum 1000 PSIG (69 bar)
Operating Temperature -20°F to +200°F (-29°C to +93.3°C)
Set Point Accuracy ±15%
Set Point Differential 20% Maximum
Switch* SPST, 20 VA
Inlet/Outlet Ports 1/4˝ NPT
Electrical Termination No. 18 AWG, 24˝ L., PVC Lead Wires
*See “Electrical Data” on Page X-5 for more information.
Dimensions
PISTON TYPE
U.L. Recognized —
File No. E31926
CSA Listed —
File No. LR30200
How To Order – Standard Models
Specify Part Number based on flow setting and switch operation.
Liquids other than water: Special calibration is available from Gems for media other
than water. Please consult factory with your requirements, including flow media,
operating pressure, flow set point and liquid viscosity (SSU).
Flow Settings
GPM
0.10
0.25
0.50
0.75
1.00
1.50
Notes:
1. Flow settings are calibrated using water @ +70°F on increasing flow, with units in a vertical position
(lead wires up).
2. Care should be taken by specifiers to ensure fluid compatibility with the above listed wetted materials.
3. Use of 50 micron filtration is recommended.
– Stock Items.
Normally Open @ No Flow Normally Closed @ No Flow Normally Open
70820 70826 26969
70821 70827 26970
70822 70828 26971
70823 70829 26972
70824 70830 26973
70825 70831 26974
Part Numbers
Brass Stainless Steel
Visit www.GemsSensors.com for most current information.
Pressure Drop – Typical
FLOW SWITCHES
G-9
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