Send a part number, a photo, or a whole BOM — we supply it and stand behind it. Worldwide shipping to 80+ countries.

3G Electric
RFQ CartGet a QuoteSign inSign up
GEMS SENSORS Liquid Flow Switch: Piston, 316 Stainless Steel, 1/2 in FNPT - Adjustable Set Point Flow Switches
GEMS SENSORSAdjustable Set Point Flow Switches

GEMS SENSORS Liquid Flow Switch: Piston, 316 Stainless Steel, 1/2 in FNPT

The GEMS SENSORS Liquid Flow Switch: Piston is an adjustable set point flow switch with a normally closed switch position and a 20 V DC contact rating. It features a 316 stainless steel construction with a 1/2 in…

SKU 3G-OTH-89201

Brand
GEMS SENSORS
Item
Liquid Flow Switch: Piston, 316 Stainless Steel, 1/2 in FNPT
Category
Adjustable Set Point Flow Switches
Available to Order
Trade pricing by quote — replies within 24h
Qty
WhatsApp an engineer
No account needed — your quote request goes straight to our engineers. A free account lets you track quotes and re-order faster.
Worldwide Shipping
Air & sea freight
Datasheet on Request
Technical specs
1-Day Quote
Replies within 24h

Technical Specifications

GEMS SENSORS
Manufacturer Part Number
FS-10798, 25364
FNPT
1/2 in
Set Point Type
Adjustable
Connection Size
1/2 in
Stainless Steel
316
Switch Position
Normally Closed
Contact Rating (DC)
20 V
Hazardous Location Specification
Class I, Div 2, Group A, B, C, D
View Full Spec Sheet

Technical Documents

No technical documents available for this product.
Request documentation →
Not sure this is the right part? Get a recommendation.

Need installation or engineering help?

Installation, commissioning, maintenance plans, system design, and bundled product + service quotes — one team handles the full scope.
Talk to an engineer

Ask a question

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

Product Description

The GEMS SENSORS Liquid Flow Switch: Piston is an adjustable set point flow switch with a normally closed switch position and a 20 V DC contact rating. It features a 316 stainless steel construction with a 1/2 in FNPT connection and is rated for hazardous locations Class I, Div 2, Groups A, B, C, D. This product is available under manufacturer part numbers FS-10798 and 25364.

Frequently Asked Questions

What is the GEMS SENSORS liquid flow switch used for?

The GEMS SENSORS liquid flow switch detects flow or no-flow conditions in piping systems. It is used in industrial processes, water treatment, and hazardous environments rated Class I, Div 2, Groups A, B, C, D. The 316 stainless steel piston and adjustable set point make it suitable for corrosive or critical applications.

What are the specifications of the GEMS SENSORS FS-10798 flow switch?

The GEMS SENSORS FS-10798 (also 25364) is a piston-type liquid flow switch with a 316 stainless steel body, 1/2 in FNPT connection, and adjustable set point. It has a normally closed switch position, 20 V DC contact rating, and is rated for hazardous locations Class I, Div 2, Groups A, B, C, D.

Where to buy GEMS SENSORS flow switches worldwide?

You can source GEMS SENSORS flow switches 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 on the FS-10798 or 25364 models.

How to install a GEMS SENSORS adjustable flow switch?

Install the GEMS SENSORS flow switch in a vertical or horizontal pipe section with flow direction matching the arrow on the body. Use thread sealant on the 1/2 in FNPT connection. Adjust the set point by turning the adjustment screw while monitoring flow. Always follow hazardous location wiring requirements for Class I, Div 2 areas.

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 adjustable set point flow switches. We supply genuine products with in-stock availability on common SKUs, technical documentation, commissioning support, and warranty service — worldwide.

You might also need

Burners & Combustion →Pumps & Compressors →Spare Parts →All Products →

Similar products

Matched by specification & description
GEMS SENSORS Liquid Flow Switch: Piston, 316 Stainless Steel, 1/4 in FNPT, 1/4 in Connection Size (MPN FS-926, 26942). Key specifications — Brand: GEMS SENSORS; Hazardous Location Specification: Class I, Div 2, Group A, B, C, D; Set Point Type: Fixed; Switch Position: Normally Closed; Contact Rating (DC): 20 V.
GEMS SENSORS
GEMS SENSORS Liquid Flow Switch: Piston, 316 Stainless Steel, 1/4 in FNPT, 1/4 in Connection Size (MPN FS-926, 26942). Key specifications — Brand: GEMS SENSORS; Hazardous Location Specification: Class I, Div 2, Group A, B, C, D; Set Point Type: Fixed; Switch Position: Normally Closed; Contact Rating (DC): 20 V.
GEMS SENSORS Liquid Flow Switch: Piston, 316 Stainless Steel, 1/4 in FNPT, 1/4 in Connection Size (MPN FS-926, 26956). Key specifications — Brand: GEMS SENSORS; Hazardous Location Specification: Class I, Div 2, Group A, B, C, D; Set Point Type: Fixed; Switch Position: Normally Closed; Contact Rating (DC): 20 V.
GEMS SENSORS
GEMS SENSORS Liquid Flow Switch: Piston, 316 Stainless Steel, 1/4 in FNPT, 1/4 in Connection Size (MPN FS-926, 26956). Key specifications — Brand: GEMS SENSORS; Hazardous Location Specification: Class I, Div 2, Group A, B, C, D; Set Point Type: Fixed; Switch Position: Normally Closed; Contact Rating (DC): 20 V.
GEMS SENSORS Liquid Flow Switch: Piston, Brass, 1/4 in FNPT, 1/4 in Connection Size, FNPT, SPDT (MPN FS-926, 26941). Key specifications — Brand: GEMS SENSORS; Hazardous Location Specification: Class I, Div 2, Group A, B, C, D; Set Point Type: Fixed; Switch Position: Normally Closed; Contact Rating (DC): 20 V.
GEMS SENSORS
GEMS SENSORS Liquid Flow Switch: Piston, Brass, 1/4 in FNPT, 1/4 in Connection Size, FNPT, SPDT (MPN FS-926, 26941). Key specifications — Brand: GEMS SENSORS; Hazardous Location Specification: Class I, Div 2, Group A, B, C, D; Set Point Type: Fixed; Switch Position: Normally Closed; Contact Rating (DC): 20 V.
GEMS SENSORS Liquid Flow Switch: Piston, Brass, 1/4 in FNPT, 1/4 in Connection Size, FNPT, SPDT (MPN FS-926, 26938). Key specifications — Brand: GEMS SENSORS; Hazardous Location Specification: Class I, Div 2, Group A, B, C, D; Set Point Type: Fixed; Switch Position: Normally Open; Contact Rating (DC): 20 V.
GEMS SENSORS
GEMS SENSORS Liquid Flow Switch: Piston, Brass, 1/4 in FNPT, 1/4 in Connection Size, FNPT, SPDT (MPN FS-926, 26938). Key specifications — Brand: GEMS SENSORS; Hazardous Location Specification: Class I, Div 2, Group A, B, C, D; Set Point Type: Fixed; Switch Position: Normally Open; Contact Rating (DC): 20 V.

More from GEMS SENSORS

View all GEMS SENSORS parts →
GEMS SENSORS Liquid Flow Switch: Piston, Bronze, 3/4 in FNPT, 3/4 in Connection Size, FNPT, SPDT (MPN FS-400, 26600). Key specifications — Brand: GEMS SENSORS; Hazardous Location Specification: Class I, Div 2, Group A, B, C, D; Set Point Type: Adjustable; Switch Position: Normally Closed; Contact Rating (DC): 20 V.
GEMS SENSORS
GEMS SENSORS Liquid Flow Switch: Piston, Bronze, 3/4 in FNPT, 3/4 in Connection Size, FNPT, SPDT (MPN FS-400, 26600). Key specifications — Brand: GEMS SENSORS; Hazardous Location Specification: Class I, Div 2, Group A, B, C, D; Set Point Type: Adjustable; Switch Position: Normally Closed; Contact Rating (DC): 20 V.
GEMS SENSORS Air Flow Switch: Piston, 316 Stainless Steel, 1/2 in FNPT, 1/2 in Connection Size, FNPT (MPN FS-10798, 25366). Key specifications — Brand: GEMS SENSORS; Hazardous Location Specification: Class I, Div 2, Group A, B, C, D; Set Point Type: Adjustable; Switch Position: Normally Closed; Contact Rating (DC): 20 V.
GEMS SENSORS
GEMS SENSORS Air Flow Switch: Piston, 316 Stainless Steel, 1/2 in FNPT, 1/2 in Connection Size, FNPT (MPN FS-10798, 25366). Key specifications — Brand: GEMS SENSORS; Hazardous Location Specification: Class I, Div 2, Group A, B, C, D; Set Point Type: Adjustable; Switch Position: Normally Closed; Contact Rating (DC): 20 V.
GEMS SENSORS Liquid Flow Switch: Piston, Bronze, 1 in FNPT, 1 in Connection Size, FNPT, SPDT, Adj (MPN FS-200, 26838). Key specifications — Brand: GEMS SENSORS; Hazardous Location Specification: Class I, Div 2, Group A, B, C, D; Set Point Type: Adjustable; Switch Position: Normally Open; Contact Rating (DC): 20 V.
GEMS SENSORS
GEMS SENSORS Liquid Flow Switch: Piston, Bronze, 1 in FNPT, 1 in Connection Size, FNPT, SPDT, Adj (MPN FS-200, 26838). Key specifications — Brand: GEMS SENSORS; Hazardous Location Specification: Class I, Div 2, Group A, B, C, D; Set Point Type: Adjustable; Switch Position: Normally Open; Contact Rating (DC): 20 V.
GEMS SENSORS Liquid Flow Switch: Piston, Bronze, 1 in FNPT, 1 in Connection Size, FNPT, SPDT, Adj (MPN FS-200, 26615). Key specifications — Brand: GEMS SENSORS; Hazardous Location Specification: Class I, Div 2, Group A, B, C, D; Set Point Type: Adjustable; Switch Position: Normally Closed; Contact Rating (DC): 20 V.
GEMS SENSORS
GEMS SENSORS Liquid Flow Switch: Piston, Bronze, 1 in FNPT, 1 in Connection Size, FNPT, SPDT, Adj (MPN FS-200, 26615). Key specifications — Brand: GEMS SENSORS; Hazardous Location Specification: Class I, Div 2, Group A, B, C, D; Set Point Type: Adjustable; Switch Position: Normally Closed; Contact Rating (DC): 20 V.
GEMS SENSORS Liquid Flow Switch: Piston, Bronze, 3/4 in FNPT, 3/4 in Connection Size, FNPT, SPDT (MPN FS-400, 26601). Key specifications — Brand: GEMS SENSORS; Hazardous Location Specification: Class I, Div 2, Group A, B, C, D; Set Point Type: Adjustable; Switch Position: Normally Open; Contact Rating (DC): 20 V.
GEMS SENSORS
GEMS SENSORS Liquid Flow Switch: Piston, Bronze, 3/4 in FNPT, 3/4 in Connection Size, FNPT, SPDT (MPN FS-400, 26601). Key specifications — Brand: GEMS SENSORS; Hazardous Location Specification: Class I, Div 2, Group A, B, C, D; Set Point Type: Adjustable; Switch Position: Normally Open; Contact Rating (DC): 20 V.
GEMS SENSORS Liquid Flow Switch: Piston, Bronze, 1 in FNPT, 1 in Connection Size, FNPT, SPDT, Adj (MPN FS-200, 26616). Key specifications — Brand: GEMS SENSORS; Hazardous Location Specification: Class I, Div 2, Group A, B, C, D; Set Point Type: Adjustable; Switch Position: Normally Closed; Contact Rating (DC): 20 V.
GEMS SENSORS
GEMS SENSORS Liquid Flow Switch: Piston, Bronze, 1 in FNPT, 1 in Connection Size, FNPT, SPDT, Adj (MPN FS-200, 26616). Key specifications — Brand: GEMS SENSORS; Hazardous Location Specification: Class I, Div 2, Group A, B, C, D; Set Point Type: Adjustable; Switch Position: Normally Closed; Contact Rating (DC): 20 V.
GEMS SENSORS Liquid Flow Switch: Piston, Bronze, 3/4 in FNPT, 3/4 in Connection Size, FNPT, SPDT (MPN FS-400, 26602). Key specifications — Brand: GEMS SENSORS; Hazardous Location Specification: Class I, Div 2, Group A, B, C, D; Set Point Type: Adjustable; Switch Position: Normally Closed; Contact Rating (DC): 20 V.
GEMS SENSORS
GEMS SENSORS Liquid Flow Switch: Piston, Bronze, 3/4 in FNPT, 3/4 in Connection Size, FNPT, SPDT (MPN FS-400, 26602). Key specifications — Brand: GEMS SENSORS; Hazardous Location Specification: Class I, Div 2, Group A, B, C, D; Set Point Type: Adjustable; Switch Position: Normally Closed; Contact Rating (DC): 20 V.
GEMS SENSORS Air Flow Switch: Piston, Brass, 1/2 in FNPT, 1/2 in Connection Size, FNPT, SPDT, Adj (MPN FS-10798, 25365). Key specifications — Brand: GEMS SENSORS; Hazardous Location Specification: Class I, Div 2, Group A, B, C, D; Set Point Type: Adjustable; Switch Position: Normally Closed; Contact Rating (DC): 20 V.
GEMS SENSORS
GEMS SENSORS Air Flow Switch: Piston, Brass, 1/2 in FNPT, 1/2 in Connection Size, FNPT, SPDT, Adj (MPN FS-10798, 25365). Key specifications — Brand: GEMS SENSORS; Hazardous Location Specification: Class I, Div 2, Group A, B, C, D; Set Point Type: Adjustable; Switch Position: Normally Closed; Contact Rating (DC): 20 V.