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GEMS SENSORS Liquid Flow Switch: Polypropylene, 1/2 in FNPT, 1/2 in Connection Size - Flow Sights with Remote Output
GEMS SENSORSFlow Sights with Remote Output

GEMS SENSORS Liquid Flow Switch: Polypropylene, 1/2 in FNPT, 1/2 in Connection Size

The GEMS SENSORS Liquid Flow Switch is a polypropylene flow sight with remote output, featuring a 1/2 in FNPT connection and SPDT switch type. It is UL Listed, with a normally open switch position and ceramic wetted…

SKU 3G-OTH-90799

Brand
GEMS SENSORS
Item
Liquid Flow Switch: Polypropylene, 1/2 in FNPT, 1/2 in Connection Size
Category
Flow Sights with Remote Output
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Technical Specifications

GEMS SENSORS
Manufacturer Part Number
RFS, 155485
Type
FNPT, SPDT
FNPT
1/2 in
Standards
UL Listed
Switch Type
SPDT
Connection Size
1/2 in
Connection Type
FNPT
Switch Position
Normally Open
Wetted Material
Ceramic
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GEMS SENSORS Products
3G Electric (S) Pte. Ltd. — Singapore

Product Description

The GEMS SENSORS Liquid Flow Switch is a polypropylene flow sight with remote output, featuring a 1/2 in FNPT connection and SPDT switch type. It is UL Listed, with a normally open switch position and ceramic wetted material.

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 applications such as pump protection, cooling water monitoring, and process control where a SPDT switch output signals flow status.

What are the specifications of the GEMS SENSORS RFS 155485 flow switch?

This flow switch has a 1/2 in FNPT connection, SPDT switch type, normally open position, and ceramic wetted material. It is UL Listed and made of polypropylene. The manufacturer part number is RFS, 155485.

Where to buy the GEMS SENSORS liquid flow switch worldwide?

3G Electric supplies the GEMS SENSORS liquid flow switch worldwide. As a global industrial solutions provider, we handle full logistics, customs clearance, and delivery to your site. Contact us for pricing and lead time on this UL Listed SPDT switch.

How to install a GEMS SENSORS liquid flow switch?

Install the flow switch in a vertical or horizontal pipe section with full flow. Ensure the arrow on the body aligns with flow direction. Use PTFE tape on the 1/2 in FNPT threads. Wire the SPDT contacts per your control circuit, and test for proper switching at set flow rate.

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 flow sights with remote output. 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 Flow Indicator: Rotor, 316 Stainless Steel, 1 in FNPT, 1 in Connection Size, FNPT (MPN RFO, 194762). Key specifications — Brand: GEMS SENSORS; Sight Material: Polysulfone; Connection Type: FNPT; Flow Direction: Horizontal Left; Seal Material: Viton; Wetted Material: Viton.
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GEMS SENSORS Liquid Flow Switch: Brass, 3/4 in FNPT, 3/4 in Connection Size, FNPT, -20°F – 212°F (MPN RFS, 180395). Key specifications — Switch Type: SPDT; Switch Position: Normally Closed; Brand: GEMS SENSORS; Connection Type: FNPT; Standards: UL Listed; Wetted Material: Ceramic.
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GEMS SENSORS Liquid Flow Switch: Brass, 1/2 in FNPT, 1/2 in Connection Size, FNPT, -20°F – 212°F (MPN RFS, 156268). Key specifications — Switch Type: SPDT; Switch Position: Normally Closed; Brand: GEMS SENSORS; Connection Type: FNPT; Standards: UL Listed; Wetted Material: Viton.
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GEMS SENSORS Flow Indicator: Rotor, Brass, 1/4 in FNPT, 1/4 in Connection Size, FNPT, Polysulfone (MPN RFO, 156261). Key specifications — Brand: GEMS SENSORS; Sight Material: Polysulfone; Connection Type: FNPT; Flow Direction: Horizontal Right; Seal Material: Viton; Wetted Material: Ceramic.
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GEMS SENSORS Flow Indicator: Rotor, Brass, 1/4 in FNPT, 1/4 in Connection Size, FNPT, Polysulfone (MPN RFO, 156261). Key specifications — Brand: GEMS SENSORS; Sight Material: Polysulfone; Connection Type: FNPT; Flow Direction: Horizontal Right; Seal Material: Viton; Wetted Material: Ceramic.
GEMS SENSORS Liquid Flow Switch: Brass, 1/4 in FNPT, 1/4 in Connection Size, FNPT, -20°F – 212°F (MPN RFS, 156265). Key specifications — Switch Type: SPDT; Switch Position: Normally Open; Brand: GEMS SENSORS; Connection Type: FNPT; Standards: UL Listed; Wetted Material: Viton.
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GEMS SENSORS Liquid Flow Switch: Brass, 1/4 in FNPT, 1/4 in Connection Size, FNPT, -20°F – 212°F (MPN RFS, 156265). Key specifications — Switch Type: SPDT; Switch Position: Normally Open; Brand: GEMS SENSORS; Connection Type: FNPT; Standards: UL Listed; Wetted Material: Viton.