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GEMS SENSORS Liquid Flow Switch: Piston, Bronze, 3/4 in FNPT, 3/4 in Connection Size - Adjustable Set Point Flow Switches
GEMS SENSORSAdjustable Set Point Flow Switches

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

The GEMS SENSORS Liquid Flow Switch: Piston is an adjustable set point flow switch with a bronze body and 3/4 in FNPT connections. It features a normally closed SPDT switch position and a DC contact rating of 20 V…

SKU 3G-OTH-89240

Brand
GEMS SENSORS
Item
Liquid Flow Switch: Piston, Bronze, 3/4 in FNPT, 3/4 in Connection Size
Category
Adjustable Set Point Flow Switches
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Technical Specifications

GEMS SENSORS
Manufacturer Part Number
FS-400, 26600
Type
Bronze, FNPT, SPDT
FNPT
3/4 in
Set Point Type
Adjustable
Connection Size
3/4 in
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

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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 bronze body and 3/4 in FNPT connections. It features a normally closed SPDT switch position and a DC contact rating of 20 V. This model (MPN FS-400, 26600) is rated for hazardous locations Class I, Div 2, Groups A, B, C, D.

Frequently Asked Questions

What is the GEMS SENSORS FS-400 liquid flow switch used for?

The GEMS SENSORS FS-400 liquid flow switch detects flow or no-flow conditions in piping systems. It is used in industrial applications requiring hazardous location ratings (Class I, Div 2, Groups A–D), such as chemical processing, oil and gas, and water treatment.

What are the specifications of the GEMS SENSORS FS-400 flow switch?

The GEMS SENSORS FS-400 (MPN 26600) is a piston-type flow switch with a bronze body, 3/4 in FNPT connections, and an adjustable set point. It has a normally closed SPDT switch with a DC contact rating of 20 V and is rated for Class I, Div 2, Groups A–D hazardous locations.

Where to buy the GEMS SENSORS FS-400 flow switch worldwide?

3G Electric supplies the GEMS SENSORS FS-400 flow switch to customers worldwide. We handle full logistics, customs clearance, and delivery to your site. Contact us for pricing and lead time on this adjustable set point piston flow switch.

How to install a GEMS SENSORS FS-400 flow switch?

Install the GEMS SENSORS FS-400 in a horizontal pipe section with the flow arrow aligned to flow direction. Use PTFE tape on the 3/4 in FNPT threads. Wire the normally closed SPDT contacts per the wiring diagram. Adjust the set point by turning the adjustment screw while monitoring flow.

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.

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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.
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GEMS SENSORS Liquid Flow Switch: Piston, 316 Stainless Steel, 1/2 in FNPT, 1/2 in Connection Size (MPN FS-10798, 25364). 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.
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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.
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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.
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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.