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GEMS SENSORS FS-500 General Purpose Piston Flow Switch - General Purpose Piston Flow Switches
GEMS SENSORSGeneral Purpose Piston Flow Switches

GEMS SENSORS FS-500 General Purpose Piston Flow Switch

The GEMS SENSORS FS-500, 170235 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…

SKU 3G-OTH-89174

Also listed as: FS500170235 · FS 500 170235 · FS-500-170235

Brand
GEMS SENSORS
Item
FS-500 General Purpose Piston Flow Switch
Part Number
FS-500, 170235
Category
General Purpose Piston Flow Switches
Available to Order
Also known as:FS-500, 170235GEMS SENSORS
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Technical Specifications

GEMS SENSORS
Manufacturer Part Number
FS-500, 170235
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

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

Product Description

The GEMS SENSORS FS-500, 170235 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.

Frequently Asked Questions

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

The GEMS SENSORS FS-500 (MPN 170235) 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, chemical processing, and HVAC equipment to trigger alarms or control pumps when flow stops or starts.

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

The FS-500 has a polypropylene body with 3/4 in FNPT connections, a fixed set point, and a normally open switch position. Its DC contact rating is 20 V. This GEMS SENSORS model (part number FS-500, 170235) is designed for general purpose liquid flow monitoring in industrial environments.

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

3G Electric supplies the GEMS SENSORS FS-500 (170235) flow switch to customers worldwide. We handle full logistics, customs clearance, and delivery to your site. Contact our team for a quote and lead time on this polypropylene piston flow switch with 3/4 in FNPT connections.

How to install a GEMS SENSORS FS-500 piston flow switch?

Install the FS-500 in a vertical or horizontal pipe section with flow direction matching the arrow on the body. Use PTFE tape on the 3/4 in FNPT threads and ensure the piston moves freely. Wire the normally open contacts to your control circuit rated for 20 V DC. Test flow activation before finalizing.

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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Compatible alternatives & equivalents

Cross-referenced by specification & description
TELEMECANIQUE SENSORS Water Pump Switch: Std, 5 psi – 65 psi, 1/4" FNPS, 20 psi / 40 psi ON/OFF (MPN 9013FSG2J20U)
TELEMECANIQUE SENSORS
TELEMECANIQUE SENSORS Water Pump Switch: Std, 5 psi – 65 psi, 1/4" FNPS, 20 psi / 40 psi ON/OFF (MPN 9013FSG2J20U)
SMC
SMC
Inline solid state auto switch for pneumatic cylinder position sensing. PNP output, M8 3-pin connector, 3 wires. IP67 rated. Maximum load current 80 mA. Used in industrial automation to detect piston position and provide feedback to controllers
SMC
SMC
Inline solid state auto switch with PNP output, M8-3Pin connector, and IP67 rating. Designed for direct inline mounting to detect cylinder piston position in pneumatic systems. Provides a switching signal for automated machinery control

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