Honeywell FS4-3S Liquid Flow Switch

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Manufacturer: Honeywell
Product No.: FS4-3S/U
Country of origin:Съединени щати
Product Type: Flow Switches
Payment: T/T, Western Union
Weight: 900g
Shipping port: Xiamen
Warranty: 12 months

Description

Industrial fluid process monitoring requires resilient hardware, and the FS4-3S flow switch provides exceptional performance in challenging environments. This liquid flow sensor utilizes a paddle actuation mechanism to monitor fluid movement in closed piping systems. Featuring a high-durability stainless steel body and Monel bellows, the FS4-3S (Part Number 114641 / FS4-3S/U) is engineered to withstand corrosive process fluids where standard brass components would degrade.

The mechanical action of fluid flow against the paddle triggers a Single-Pole Double-Throw (SPDT) electrical switch. This simple yet highly reliable design allows operators to integrate the flow switch into automated control networks to cycle pumps, activate alarms, or signal downstream PLC or DCS platforms during critical flow fluctuations.

Features

Corrosion-Resistant Construction: Built with a stainless steel body and Monel bellows to handle aggressive or brackish liquids safely.
Flexible Switching: SPDT electrical contact structure supports both normally open and normally closed wiring profiles.
Mechanical Actuation: Responds accurately to fluid velocity variations to provide immediate system protection.
Industrial Durability: Designed for heavy-duty industrial processing environments requiring stable physical sealing.

Applications

Industrial chemical processing lines.
Water treatment and hydronic filtration systems.
HVAC liquid cooling loop monitoring.
Boiler feed water line supervision.

Technical Specifications

Manufacturer	Honeywell
Part Number / Model	FS4-3S (114641 / FS4-3S/U)
Body Material	Stainless Steel
Bellows Material	Monel
Switch Contact Configuration	SPDT (Single Pole Double Throw)
Weight	0.9 kg

Connections and Interfaces

Terminal Designation	Function
Common (C)	Line input connection
Normally Closed (NC)	Opens contact on liquid flow increase
Normally Open (NO)	Closes contact on liquid flow increase

Installation Guidelines

Orientation: Mount exclusively in horizontal pipe runs where the paddle assembly hangs vertically downward.
Upstream/Downstream Clearances: Provide a minimum of five pipe diameters of straight, unobstructed piping upstream and downstream of the switch.
Flow Direction: Ensure the arrow cast on the switch housing aligns with the actual fluid flow direction inside the pipe.
Electrical Wiring: De-energize control loops prior to servicing or terminating wires to the SPDT screw terminals.

Key Features:

#Flow Switches #Honeywell FS4 Series

What materials are used in the Honeywell FS4-3S flow switch?

The Honeywell FS4-3S features a high-grade stainless steel body and Monel bellows, providing superior corrosion resistance for aggressive fluid processes compared to standard brass switches.

What type of electrical switch does the FS4-3S utilize?

The device utilizes a Single-Pole Double-Throw (SPDT) switch contact, allowing it to control two separate electrical circuits or signal states depending on the flow conditions.

Can this switch be mounted in any orientation?

No, the FS4-3S should be mounted in a horizontal pipe run with the paddle pointing vertically downward to ensure accurate flow actuation and return.

Глобална експресна доставка

Стандартна доставка: 4-6 работни дни чрез DHL, FedEx и UPS.
Експресна изпращане: Изпращане в същия ден за налични поръчки, направени преди 14:00 ч. (GMT+8).
Глобално покритие: Обслужваме над 150 държави, включително бърза доставка до Саудитска Арабия и ОАЕ.

Връщания и гаранция

30-дневна гаранция: Връщания се приемат за налични продукти в оригинална, фабрично запечатана опаковка.
12-месечна гаранция: Всеки индустриален компонент е подкрепен с нашата професионална техническа гаранция.

Поръчките се обработват и доставят от понеделник до петък (с изключение на официалните празници).

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TECHNICAL SPECIFICATIONS

Country of origin

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Honeywell FS4-3S Liquid Flow Switch