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
Dwyer Liquid Flow Switch: Paddle, 1 1/2 in For Pipe Size, Brass, 1 1/2 in NPT - Insertion-Style Hazardous-Location Switches for Liquids
DwyerInsertion-Style Hazardous-Location Switches for Liquids

Dwyer Liquid Flow Switch: Paddle, 1 1/2 in For Pipe Size, Brass, 1 1/2 in NPT

The DWYER V4-2-U is an insertion-style hazardous-location liquid flow switch with a paddle actuator, designed for 1-1/2 in pipe size. It carries a Class I, Div 1 and 2, Group A, B, C, D hazardous location rating and…

SKU 3G-OTH-88485

Brand
Dwyer
Item
Liquid Flow Switch: Paddle, 1 1/2 in For Pipe Size, Brass, 1 1/2 in NPT
Category
Insertion-Style Hazardous-Location Switches for Liquids
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

Dwyer
Manufacturer Part Number
V4-2-U
Type
Brass, NPT, -4°F to 275°F
NPT
1 1/2 in
For Pipe Size
1-1/2 in
Contact Rating (AC)
10 A @ 125/250V
Contact Rating (DC)
5 A res., 3 A ind. @ 30 VDC . MV option: 1 A @125 VAC
Hazardous Location Rating
Class I, Div 1 and 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

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

Product Description

The DWYER V4-2-U is an insertion-style hazardous-location liquid flow switch with a paddle actuator, designed for 1-1/2 in pipe size. It carries a Class I, Div 1 and 2, Group A, B, C, D hazardous location rating and features a brass body with 1-1/2 in NPT connection. The switch offers AC contact ratings of 10 A @ 125/250V and DC contact ratings of 5 A resistive, 3 A inductive @ 30 VDC, with an MV option of 1 A @ 125 VAC, operating in temperatures from -4°F to 275°F.

Used in

Common applications for Dwyer
Combustion air-filter monitoring — Magnehelic Series 2000 on burner air-intake filter banks
Clean-room and pharmaceutical pressurisation — Magnehelic / Capsuhelic differential-pressure gauges
HVAC fan-discharge static pressure — Mark II inclined-vertical manometers on AHU test points
Filter-blockage alarms — Photohelic Series 3000 combined gauge/switch on air-handling units
BMS-integrated pressure monitoring — Digihelic DH3 with 4–20 mA output for building management

Dwyer Products

3G Electric supplies Dwyer insertion-style hazardous-location switches for liquids. 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
DWYER Liquid Flow Switch: Paddle, 1/2 in/1/4 in/2 in/3/8 in For Pipe Size, Stainless Steel, 2 in NPT (MPN V6EPS-S-S-6-0). Key specifications — Brand: DWYER; Contact Rating (DC): 46 A (Inductive) @ 30V (CSA, ATEX and IECEx Models); For Pipe Size: 1/4 in; Hazardous Location Rating: Class I, Div 1 and 2, Group A, B, C, D; Contact Rating (AC): 5 A @ 125/250V.
Dwyer
DWYER Liquid Flow Switch: Paddle, 1/2 in/1/4 in/2 in/3/8 in For Pipe Size, Stainless Steel, 2 in NPT (MPN V6EPS-S-S-6-0). Key specifications — Brand: DWYER; Contact Rating (DC): 46 A (Inductive) @ 30V (CSA, ATEX and IECEx Models); For Pipe Size: 1/4 in; Hazardous Location Rating: Class I, Div 1 and 2, Group A, B, C, D; Contact Rating (AC): 5 A @ 125/250V.
DWYER Liquid Flow Switch: Paddle, 1/2 in/1/4 in/2 in/3/8 in For Pipe Size, Brass, 1 1/2 in NPT, NPT (MPN V6EPB-B-S-5-MI). Key specifications — Brand: DWYER; Contact Rating (DC): 27 A (Inductive) @ 30V (CSA, ATEX and IECEx Models); For Pipe Size: 1/2 in; Hazardous Location Rating: Class I, Div 1 and 2, Group A, B, C, D; Contact Rating (AC): 5 A @ 125/250V.
Dwyer
DWYER Liquid Flow Switch: Paddle, 1/2 in/1/4 in/2 in/3/8 in For Pipe Size, Brass, 1 1/2 in NPT, NPT (MPN V6EPB-B-S-5-MI). Key specifications — Brand: DWYER; Contact Rating (DC): 27 A (Inductive) @ 30V (CSA, ATEX and IECEx Models); For Pipe Size: 1/2 in; Hazardous Location Rating: Class I, Div 1 and 2, Group A, B, C, D; Contact Rating (AC): 5 A @ 125/250V.
DWYER Liquid Flow Switch: Paddle, 1/2 in/1/4 in/2 in/3/8 in For Pipe Size, Brass, 1 in NPT, NPT (MPN V6EPB-B-D-3-MI). Key specifications — Brand: DWYER; Contact Rating (DC): 5 A Resistive @ 30V (CSA, ATEX and IECEx Models); For Pipe Size: 2 in; Hazardous Location Rating: Class I, Div 1 and 2, Group A, B, C, D; Contact Rating (AC): 5 A @ 125/250V.
Dwyer
DWYER Liquid Flow Switch: Paddle, 1/2 in/1/4 in/2 in/3/8 in For Pipe Size, Brass, 1 in NPT, NPT (MPN V6EPB-B-D-3-MI). Key specifications — Brand: DWYER; Contact Rating (DC): 5 A Resistive @ 30V (CSA, ATEX and IECEx Models); For Pipe Size: 2 in; Hazardous Location Rating: Class I, Div 1 and 2, Group A, B, C, D; Contact Rating (AC): 5 A @ 125/250V.
DWYER Liquid Flow Switch: Paddle, 1/2 in/1/4 in/2 in/3/8 in For Pipe Size, Brass, 1/2 in NPT, NPT (MPN V6EPB-B-S-1-MI). Key specifications — Brand: DWYER; Contact Rating (DC): 19 A (Inductive) @ 30V (CSA, ATEX and IECEx Models); For Pipe Size: 1/4 in; Hazardous Location Rating: Class II, Div 1 and 2, Group E, F, G; Contact Rating (AC): 5 A @ 125/250V.
Dwyer
DWYER Liquid Flow Switch: Paddle, 1/2 in/1/4 in/2 in/3/8 in For Pipe Size, Brass, 1/2 in NPT, NPT (MPN V6EPB-B-S-1-MI). Key specifications — Brand: DWYER; Contact Rating (DC): 19 A (Inductive) @ 30V (CSA, ATEX and IECEx Models); For Pipe Size: 1/4 in; Hazardous Location Rating: Class II, Div 1 and 2, Group E, F, G; Contact Rating (AC): 5 A @ 125/250V.
DWYER Liquid Flow Switch: Paddle, 1/2 in/1/4 in/2 in/3/8 in For Pipe Size, Brass, 1 1/4 in NPT, NPT (MPN V6EPB-B-S-4-B). Key specifications — Brand: DWYER; Contact Rating (DC): 24 A (Inductive) @ 30V (CSA, ATEX and IECEx Models); For Pipe Size: 1/2 in; Hazardous Location Rating: Class I, Div 1 and 2, Group A, B, C, D; Contact Rating (AC): 5 A @ 125/250V.
Dwyer
DWYER Liquid Flow Switch: Paddle, 1/2 in/1/4 in/2 in/3/8 in For Pipe Size, Brass, 1 1/4 in NPT, NPT (MPN V6EPB-B-S-4-B). Key specifications — Brand: DWYER; Contact Rating (DC): 24 A (Inductive) @ 30V (CSA, ATEX and IECEx Models); For Pipe Size: 1/2 in; Hazardous Location Rating: Class I, Div 1 and 2, Group A, B, C, D; Contact Rating (AC): 5 A @ 125/250V.

More from Dwyer

View all Dwyer parts →
DWYER Liquid Flow Switch: Paddle, 1/2 in/1/4 in/2 in/3/8 in For Pipe Size, Stainless Steel, 2 in NPT (MPN V6EPS-S-D-6-0). Key specifications — Brand: DWYER; Contact Rating (DC): 5 A Resistive @ 30V (CSA, ATEX and IECEx Models); For Pipe Size: 1/4 in; Hazardous Location Rating: Class II, Div 1 and 2, Group E, F, G; Contact Rating (AC): 5 A @ 125/250V.
Dwyer
DWYER Liquid Flow Switch: Paddle, 1/2 in/1/4 in/2 in/3/8 in For Pipe Size, Stainless Steel, 2 in NPT (MPN V6EPS-S-D-6-0). Key specifications — Brand: DWYER; Contact Rating (DC): 5 A Resistive @ 30V (CSA, ATEX and IECEx Models); For Pipe Size: 1/4 in; Hazardous Location Rating: Class II, Div 1 and 2, Group E, F, G; Contact Rating (AC): 5 A @ 125/250V.
DWYER Flotect Flow Switch Brass Body: Paddle, 3/4 in For Pipe Size, Brass, 3/4 in NPT, NPT, SPDT (MPN V6EPB-B-S-2-B). Key specifications — Brand: DWYER; Contact Rating (DC): 5 A Resistive @ 30V (CSA, ATEX and IECEx Models); For Pipe Size: 3/4 in; Hazardous Location Rating: Class II, Div 1 and 2, Group E, F, G; Contact Rating (AC): 5 A @ 125/250V (UL Models).
Dwyer
DWYER Flotect Flow Switch Brass Body: Paddle, 3/4 in For Pipe Size, Brass, 3/4 in NPT, NPT, SPDT (MPN V6EPB-B-S-2-B). Key specifications — Brand: DWYER; Contact Rating (DC): 5 A Resistive @ 30V (CSA, ATEX and IECEx Models); For Pipe Size: 3/4 in; Hazardous Location Rating: Class II, Div 1 and 2, Group E, F, G; Contact Rating (AC): 5 A @ 125/250V (UL Models).
DWYER Liquid Flow Switch: Paddle, 1 1/2 in For Pipe Size, Stainless Steel, 1 1/2 in NPT, NPT, DPDT (MPN V4-SS-2-D-U). Key specifications — Brand: DWYER; Contact Rating (DC): 5 A res., 3 A ind. @ 30 VDC . MV option: 1 A @125 VAC; For Pipe Size: 1-1/2 in; Hazardous Location Rating: Class I, Div 1 and 2, Group A, B, C, D; Contact Rating (AC): 10 A @ 125/250V.
Dwyer
DWYER Liquid Flow Switch: Paddle, 1 1/2 in For Pipe Size, Stainless Steel, 1 1/2 in NPT, NPT, DPDT (MPN V4-SS-2-D-U). Key specifications — Brand: DWYER; Contact Rating (DC): 5 A res., 3 A ind. @ 30 VDC . MV option: 1 A @125 VAC; For Pipe Size: 1-1/2 in; Hazardous Location Rating: Class I, Div 1 and 2, Group A, B, C, D; Contact Rating (AC): 10 A @ 125/250V.
DWYER Liquid Flow Switch: Paddle, 1 1/2 in For Pipe Size, Stainless Steel, 1 1/2 in NPT, NPT, SPDT (MPN V4-SS-2-U). Key specifications — Brand: DWYER; Contact Rating (DC): 5 A res., 3 A ind. @ 30 VDC . MV option: 1 A @125 VAC; For Pipe Size: 1-1/2 in; Hazardous Location Rating: Class II, Div 1 and 2, Group E, F, G; Contact Rating (AC): 10 A @ 125/250V.
Dwyer
DWYER Liquid Flow Switch: Paddle, 1 1/2 in For Pipe Size, Stainless Steel, 1 1/2 in NPT, NPT, SPDT (MPN V4-SS-2-U). Key specifications — Brand: DWYER; Contact Rating (DC): 5 A res., 3 A ind. @ 30 VDC . MV option: 1 A @125 VAC; For Pipe Size: 1-1/2 in; Hazardous Location Rating: Class II, Div 1 and 2, Group E, F, G; Contact Rating (AC): 10 A @ 125/250V.
DWYER Liquid Flow Switch: Paddle, 1/2 in/1/4 in/2 in/3/8 in For Pipe Size, Brass, 1/2 in NPT, NPT (MPN V6EPB-B-S-6-0). Key specifications — Brand: DWYER; Contact Rating (DC): 5 A Resistive @ 30V (CSA, ATEX and IECEx Models); For Pipe Size: 3/8 in; Hazardous Location Rating: Class I, Div 1 and 2, Group A, B, C, D; Contact Rating (AC): 5 A @ 125/250V.
Dwyer
DWYER Liquid Flow Switch: Paddle, 1/2 in/1/4 in/2 in/3/8 in For Pipe Size, Brass, 1/2 in NPT, NPT (MPN V6EPB-B-S-6-0). Key specifications — Brand: DWYER; Contact Rating (DC): 5 A Resistive @ 30V (CSA, ATEX and IECEx Models); For Pipe Size: 3/8 in; Hazardous Location Rating: Class I, Div 1 and 2, Group A, B, C, D; Contact Rating (AC): 5 A @ 125/250V.
DWYER Liquid Flow Switch: Paddle, 1/2 in/1/4 in/2 in/3/8 in For Pipe Size, Brass, 2 in NPT, NPT (MPN V6EPB-B-D-6-0). Key specifications — Brand: DWYER; Contact Rating (DC): 17 A (Inductive) @ 30V (CSA, ATEX and IECEx Models); For Pipe Size: 1/4 in; Hazardous Location Rating: Class I, Div 1 and 2, Group A, B, C, D; Contact Rating (AC): 5 A @ 125/250V.
Dwyer
DWYER Liquid Flow Switch: Paddle, 1/2 in/1/4 in/2 in/3/8 in For Pipe Size, Brass, 2 in NPT, NPT (MPN V6EPB-B-D-6-0). Key specifications — Brand: DWYER; Contact Rating (DC): 17 A (Inductive) @ 30V (CSA, ATEX and IECEx Models); For Pipe Size: 1/4 in; Hazardous Location Rating: Class I, Div 1 and 2, Group A, B, C, D; Contact Rating (AC): 5 A @ 125/250V.
DWYER Flow Switch: Paddle, 1/2 in/1/4 in/2 in/3/8 in For Pipe Size, Brass, 1/2 in NPT, NPT, SPDT (MPN V6EPB-B-S-1-B). Key specifications — Brand: DWYER; Contact Rating (DC): 3 A (Inductive) @ 30V (CSA, ATEX and IECEx Models); For Pipe Size: 1/2 in; Hazardous Location Rating: Class II, Div 1 and 2, Group E, F, G; Contact Rating (AC): 5 A @ 125/250V (MT Option).
Dwyer
DWYER Flow Switch: Paddle, 1/2 in/1/4 in/2 in/3/8 in For Pipe Size, Brass, 1/2 in NPT, NPT, SPDT (MPN V6EPB-B-S-1-B). Key specifications — Brand: DWYER; Contact Rating (DC): 3 A (Inductive) @ 30V (CSA, ATEX and IECEx Models); For Pipe Size: 1/2 in; Hazardous Location Rating: Class II, Div 1 and 2, Group E, F, G; Contact Rating (AC): 5 A @ 125/250V (MT Option).
DWYER Liquid Flow Switch: Paddle, 1 1/2 in For Pipe Size, Brass, 1 1/2 in NPT, NPT, -4°F to 275°F (MPN V4-2-D-U). Key specifications — Brand: DWYER; Contact Rating (DC): UL, FM, ATEX and IECEx models 10 A @ 125/250 VAC. CSA models: 5 A @ 125/250 VAC; For Pipe Size: 1-1/2 in; Hazardous Location Rating: Class I, Div 1 and 2, Group A, B, C, D; Contact Rating (AC): 10 A @ 125/250V.
Dwyer
DWYER Liquid Flow Switch: Paddle, 1 1/2 in For Pipe Size, Brass, 1 1/2 in NPT, NPT, -4°F to 275°F (MPN V4-2-D-U). Key specifications — Brand: DWYER; Contact Rating (DC): UL, FM, ATEX and IECEx models 10 A @ 125/250 VAC. CSA models: 5 A @ 125/250 VAC; For Pipe Size: 1-1/2 in; Hazardous Location Rating: Class I, Div 1 and 2, Group A, B, C, D; Contact Rating (AC): 10 A @ 125/250V.