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GEMS SENSORS Liquid Flow Switch: Piston, Polypropylene, 3/4 in FNPT, 3/4 in Connection Size - General Purpose Piston Flow Switches
GEMS SENSORSGeneral Purpose Piston Flow Switches

GEMS SENSORS Liquid Flow Switch: Piston, Polypropylene, 3/4 in FNPT, 3/4 in Connection Size

The GEMS SENSORS Liquid Flow Switch is a general purpose piston flow switch with a fixed set point and normally open switch position. It features a polypropylene body with 3/4 in FNPT connections and a contact rating…

SKU 3G-OTH-89247

Also listed as: FS500175117 · FS 500 175117 · FS-500-175117

Brand
GEMS SENSORS
Item
Liquid Flow Switch: Piston, Polypropylene, 3/4 in FNPT, 3/4 in Connection Size
Category
General Purpose Piston Flow Switches
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Delivery
Worldwide DHL shipping from Singapore; 7–14 business days door-to-door for most destinations.
Payment
Invoicing in USD. Bank transfer (SWIFT) and corporate PO accepted.

Technical Specifications

GEMS SENSORS
Manufacturer Part Number
FS-500, 175117
Type
Polypropylene, FNPT
FNPT
3/4 in
Set Point Type
Fixed
Connection Size
3/4 in
Switch Position
Normally Open
Contact Rating (DC)
20 V

Technical Documents

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

Product Description

The GEMS SENSORS Liquid Flow Switch is a general purpose piston flow switch with a fixed set point and normally open switch position. It features a polypropylene body with 3/4 in FNPT connections and a contact rating of 20 V DC. This model is identified by manufacturer part numbers FS-500 and 175117.

Frequently Asked Questions

What is the GEMS SENSORS FS-500 liquid flow switch used for?

The GEMS SENSORS FS-500 is a general purpose piston flow switch used to detect liquid flow or no-flow conditions in industrial piping systems. It is commonly applied in water treatment, HVAC, and process control to protect pumps and equipment from dry running or low flow.

What are the specifications of the GEMS SENSORS FS-500 flow switch?

The GEMS SENSORS FS-500 is a fixed set point, normally open piston flow switch with a polypropylene body and 3/4 in FNPT connections. Its DC contact rating is 20 V. The manufacturer part numbers are FS-500 and 175117. It is designed for general purpose liquid flow monitoring.

Where to buy the GEMS SENSORS FS-500 flow switch worldwide?

3G Electric supplies the GEMS SENSORS FS-500 flow switch worldwide. As a global industrial equipment distributor, we handle full logistics, customs clearance, and delivery to your location. Contact us for availability and lead time; we source and deliver this model globally.

How to install a GEMS SENSORS piston flow switch?

Install the GEMS SENSORS piston flow switch in a horizontal pipe section with the arrow on the body aligned with flow direction. Use PTFE tape on the 3/4 in FNPT threads to prevent leaks. Wire the normally open contacts to your control circuit. Always verify the set point and test operation before commissioning.

Used in

Common applications for GEMS SENSORS
Burner management — GEMS SENSORS FS-4 piston flow switch for monitoring cooling water flow in industrial burners
Pump protection — GEMS SENSORS FS-380 high-pressure flow switch to detect loss of flow in pump systems
Process control — GEMS SENSORS 230500 thermal-dispersion flow switch for low-flow detection in chemical processes
Cooling systems — GEMS SENSORS RFS flow sight with remote output for visual and electrical flow indication in heat exchangers
Water treatment — GEMS SENSORS FT-110 turbine flow sensor for measuring flow rates in filtration systems
Hydraulic systems — GEMS SENSORS FS-500 polypropylene piston flow switch for corrosive fluid monitoring in hydraulic circuits

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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