Master Catalog — Gems Sensors & Controls - G-24

FS-400 Series -
General Purpose, 90° Flow Path

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Flow Rate Settings: Fixed Version: 0.75 GPM to 10.0 GPM
Adjustable Version: 0.75 GPM to 14.0 GPM

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Port Size: 3/4˝

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Primary Construction Material: Bronze
Setting Type: Fixed or Adjustable
Provides accurate flow detection in water and oil with 1% repeatability. Flow settings
on the adjustable version can be easily changed without disassembly. A shuttle bypass vane inside the housing is controlled externally using an ordinary flat-blade
screwdriver. These switches are ruggedly constructed of non-corrosive materials and
resist shock and vibration. Suitable for triggering alarms on interlocking shutdown
circuitry when flow rate is improper to protect bearings, gears and cooling systems.

Specification
Wetted Materials
Housing

FS-400 Adjustable

U.L. Recognized -
File No. E31926
CSA Listed -
LR30200 and LR22666
FM Approved -
File No. 0A8A3.AE and
1H3A2.AX

CSA Listed -
File No. LR22666
FM Approved -
File No. 0A8A3.AE

Bronze

Shuttle

Delrin®

Spring

316 Stainless Steel

O-Ring

Viton®

Other Wetted Parts

Ceramic

Pressure Rating, Maximum
Operating

Dimensions
1-7/16 " HEX
(36.5 mm)

800 PSI (55.2 bar) @ 100°F (+37.8°C)

3-27/32 "
(97.6 mm)

-20°F to +180°F (-29°C to +82.2°C)

Repeatability

1% Maximum Deviation

Set Point Accuracy

±10%

Set Point Differential

15% Maximum

Switch*

SPDT, 20 VA

Inlet/Outlet Ports

3/4˝ NPT

Electrical Termination

No. 18 AWG, 24˝ L., Polymeric Lead Wires

1-3/8 "
(34.9 mm)
1-3/8 "
(34.9 mm)

Pressure Drop - Typical

*See " Electrical Data " on Page X-5 for more information.

30

How To Order - Standard Models

25

Specify Part Number based on flow settings for the FS-400 Series, based on flow
setting range for the FS-400 Adjustable version.
FS-400 Series

FS-400 Adjustable

Flow Setting
GPM

Part
Numbers

0.75

26440

1.5

26441

2.0

26442

2.5

26443

5.0

26444

7.5

26445

10.0

26446

NPT

3/4˝

Flow Setting
GPM

Part
Numbers

0.75-4.0

26600

2.0-8.0

26601

7.0-14.0

26602

PRESSURE DROP (PSID)

FLOW SWITCHES

Operating Temperature

3/4˝

1/2 " NPT

400 PSI (27.6 bar) @ 100°F (+37.8°C)

Proof

NPT

FS-400 Series

20

Part No. 26446

15
10

Part No. 26443

5

Part No. 26440

0
0

5

10

15

20

FLOW RATE - GPM
Tests conducted with units in vertical position (lead wires up) with water at
+70°F (21°C).

FS-400 switches are U.L. Approved for Class I,
Division 2, Groups A, B, C, D hazardous areas.

Notes:
1.	 Flow settings for Fixed Version are calibrated using water at +70°F on increasing flow, with units in a
vertical position (lead wires up). Temperature changes will slightly affect the flow settings listed.
2.	 Adjustable units that are set to customer specifications are subject to GEMS test stand accuracy.
3.	 Use of 150 micron filtration is recommended.
4.	 Minimum 5 PSI line pressure required.

Available with FM-approved, explosion-proof junction
box for Class I, Division 1, Group D hazardous locations.
Units must be assembled completely at GEMS.
U.L. Approved - File No. E183854

-- Stock Items.

G-24

Visit www.GemsSensors.com for most current information.

FS-400 Series / p1of2 / 30-JUL-14
Master Catalog — Gems Sensors & Controls

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