Gems Sensors & Controls FS-400, FS-200 Operating Manual

Shuttle-Type Flow Switches

Series FS-200/400

Instruction Bulletin No. 45523

Installation

Install FS-200 or FS-400 Series units in piping system using standard pipe fitting procedures. Be careful to keep
sealing compound out of the unit. Be sure to observe direction of flow - marked “IN” and “OUT” on housing. See
chart below for port and wrench hex. sizes.

Unless otherwise specified, standard FS-200 and FS-400 units are factory-calibrated with water. FS-200 and
FS-200 Adjustable units are installed horizontally, in line, with lead wires up. FS-400 and FS-400 Adjustable units are
installed vertically; lead wires up, as shown. 150 micron filtration is suggested for use with all units.

Specifications (FS-200 Series)

Wetted Materials

Housing

FS-200

FS-200 Adj.

Shuttle

Bonnet

Spring

Other Wetted Parts

Pressure Rating

Operating

Proof

Operating Temperature

FS-200

FS-200 Adj.

Repeatability

Set Point Accuracy

Set Point Differential
Switch*

Electrical Termination

#18 AWG, 24" L.

Polymeric

Jacket

B

A

1/2" NPT

Bronze or 316 Stainless Steel

Bronze

Teflon



Bronze or Stainless Steel

316 Stainless Steel



Viton

, Ceramic

400 PSIG @ 100°F (37.8°C)

800 PSIG @ 100°F (37.8°C)

-20°F to +300°F (-29°C to +148.9°C)

-20°F to +200°F (-29°C to +93.3°C)

1% Maximum Deviation

±10%

15% Maximum

SPDT, 20 VA

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

Dimensions (FS-200 Series)

Bonnet

Switch

Housing

Inlet Port

NPT Port

C

Note: Bonnet and shuttle

assembly should be removed

from unit during welding or

brazing.

(See bonnet assembly removal

under “Maintenance” on back

of sheet.)

*See "Electrical Data"

on inside pages

Port Size

NPT

1"

1-1/4"

FS-200

and

FS-200

Adjustable

Adjustable versions available in 1" port sizes only.

1-1/4" SS

1-1/2"

2"

2-1/2"

3"

"A" Dim.

3-1/4"

4"

4-1/2"

4-1/2"

5-3/8"

6-5/16"

7-3/8"

"B" Dim.Model

3"

3-3/16"

3-3/16"

3-1/2"

4"

4-1/2"

5-5/32"

"C" Dim.

(HEX)

1-25/32"

2-3/16"

2-3/16"

2-1/2"

3-3/32"

3-5/8"

4-3/8"

Specifications (FS-400 Series) . . .

Wetted Materials

Housing

Shuttle

Spring

O-Ring

Other Wetted Parts

Pressure Rating, Max.

Operating

Proof

Operating Temperature

Repeatability

Set Point Accuracy

Set Point Differential

Switch

Inlet/Outlet Ports

Electrical Termination

*

Bronze



Delrin

316 Stainless Steel



Viton

Ceramic

400 PSI @ 100°F (+37.8°C)

800 PSI @ 100°F (+37.8°C)

-20°F to +180°F (-29°C to +82.2°C)

1% Maximum Deviation

±10%

15% Maximum

SPDT, 20 VA

3/4" NPT

No. 18 AWG, 24" L.,

Polymeric Lead Wires

*See "Electrical Data" below.

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.

Electrical Data

Switch Ratings - Maximum Resistive Load