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GEMS SENSORS FS-4 General Purpose Piston Flow Switch - General Purpose Piston Flow Switches
GEMS SENSORSGeneral Purpose Piston Flow Switches

GEMS SENSORS FS-4 General Purpose Piston Flow Switch

The GEMS SENSORS Liquid Flow Switch: Piston is a general purpose piston flow switch with a fixed set point and normally closed switch position. It features a 20 V DC contact rating, a PPS body, and a 9/16 in UNF…

SKU 3G-OTH-89278

Also listed as: FS4122352 · FS 4 122352 · FS-4-122352

Brand
GEMS SENSORS
Item
FS-4 General Purpose Piston Flow Switch
Part Number
FS-4, 122352
Category
General Purpose Piston Flow Switches
Available to Order
Also known as:FS-4, 122352GEMS SENSORS
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Technical Specifications

GEMS SENSORS
Manufacturer Part Number
FS-4, 122352
Type
PPS, UNF, SPDT, Fixed
UNF
9/16 in
Set Point Type
Fixed
Connection Size
9/16 in
Switch Position
Normally Closed
Contact Rating (DC)
20 V

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GEMS SENSORS Products
3G Electric (S) Pte. Ltd. — Singapore

Product Description

The GEMS SENSORS Liquid Flow Switch: Piston is a general purpose piston flow switch with a fixed set point and normally closed switch position. It features a 20 V DC contact rating, a PPS body, and a 9/16 in UNF connection size, with SPDT switching. The manufacturer part number is FS-4, 122352.

Frequently Asked Questions

What is the GEMS SENSORS FS-4 liquid flow switch used for?

The GEMS SENSORS FS-4 liquid flow switch is used to detect flow or no-flow conditions in industrial piping systems. It is commonly applied in water treatment, cooling systems, and process control to trigger alarms or shut down equipment when flow stops, protecting pumps and other assets.

What are the specifications of the GEMS SENSORS FS-4 flow switch?

The GEMS SENSORS FS-4 is a general purpose piston flow switch with a fixed set point and normally closed switch position. It has a 20 V DC contact rating, SPDT switching, a PPS body, and a 9/16 in UNF connection size. The manufacturer part number is FS-4, 122352.

Where to buy the GEMS SENSORS FS-4 flow switch worldwide?

You can source the GEMS SENSORS FS-4 flow switch through 3G Electric, a global industrial equipment distributor. We handle full logistics, customs clearance, and delivery to worldwide destinations. Contact us for availability and lead time; we provide reliable sourcing for this GEMS SENSORS model.

How to install a GEMS SENSORS piston flow switch?

Install the GEMS SENSORS piston flow switch in a vertical or horizontal pipe section with flow in the direction indicated on the body. Ensure the 9/16 in UNF connection is properly sealed with thread tape. Wire the SPDT contacts according to your control circuit, and verify the fixed set point matches your system requirements.

Used in

Common applications for GEMS SENSORS
Cooling water systems — Gems Sensors flow sights with remote output (e.g., 1AMB2) monitor flow to critical equipment and signal alarms.
Lubrication lines — Gems Sensors flow indicators (e.g., 1AMD3) provide visual confirmation of oil flow to bearings and gears.
Process water monitoring — Gems Sensors flow sights (e.g., 1AMB9) verify flow in water treatment and chemical dosing systems.
HVAC systems — Gems Sensors flow switches (e.g., 1AMB5) detect flow in chilled water and condenser loops for pump control.
Food and beverage — Gems Sensors flow sights with stainless steel bodies (e.g., 1AMD4) are used in clean-in-place (CIP) systems for flow verification.
Power generation — Gems Sensors flow sights (e.g., 1AMB6) monitor cooling water and lube oil flow in turbines and generators.
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GEMS SENSORS Products

3G Electric supplies GEMS SENSORS general purpose piston flow switches. We supply genuine products with in-stock availability on common SKUs, technical documentation, commissioning support, and warranty service — worldwide.

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