We ship worldwide — Singapore, Australia, Malaysia, Indonesia, Philippines, India, Middle East & more

3G Electric
⌕
RFQ CartGet a QuoteSign inSign up
Dwyer Window Sight Flow Indicator with Impeller: Rotor, Bronze, 1/4 in FNPT - Flow Sights with Indicator
DwyerFlow Sights with Indicator

Dwyer Window Sight Flow Indicator with Impeller: Rotor, Bronze, 1/4 in FNPT

The DWYER SFI-300-1/4 is a Window Sight Flow Indicator with Impeller: Rotor, designed for water media in vertical down flow. It features a bronze body, 1/4 in FNPT connections, tempered glass sight, Buna-N seal, and…

SKU 3G-OTH-91932

Brand
Dwyer
Item
Window Sight Flow Indicator with Impeller: Rotor, Bronze, 1/4 in FNPT
Category
Flow Sights with Indicator
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
SFI-300-1/4
Type
Bronze
FNPT
1/4 in
Seal Material
Buna-N
Flow Direction
Vertical Down
For Media Type
Water
Sight Material
Tempered Glass
Connection Size
1/4 in
Connection Type
FNPT
Wetted Material
PTFE
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 SFI-300-1/4 is a Window Sight Flow Indicator with Impeller: Rotor, designed for water media in vertical down flow. It features a bronze body, 1/4 in FNPT connections, tempered glass sight, Buna-N seal, and PTFE wetted material.

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 flow sights with indicator. 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 Window Sight Flow Indicator with Impeller: Rotor, Bronze, 1/2 in FNPT, 1/2 in Connection Size (MPN SFI-300-1/2). Key specifications — For Media Type: Gear Lube; Brand: DWYER; Sight Material: Tempered Glass; Connection Type: FNPT; Flow Direction: Vertical Up; Seal Material: Buna-N; Wetted Material: Bronze.
Dwyer
DWYER Window Sight Flow Indicator with Impeller: Rotor, Bronze, 1/2 in FNPT, 1/2 in Connection Size (MPN SFI-300-1/2). Key specifications — For Media Type: Gear Lube; Brand: DWYER; Sight Material: Tempered Glass; Connection Type: FNPT; Flow Direction: Vertical Up; Seal Material: Buna-N; Wetted Material: Bronze.
DWYER Window Sight Flow Indicator with Impeller: Rotor, Bronze, 3/4 in FNPT, 3/4 in Connection Size (MPN SFI-100-3/4). Key specifications — For Media Type: Glycol; Brand: DWYER; Sight Material: Tempered Glass; Connection Type: FNPT; Flow Direction: Vertical Up; Seal Material: Buna-N; Wetted Material: Tempered Glass.
Dwyer
DWYER Window Sight Flow Indicator with Impeller: Rotor, Bronze, 3/4 in FNPT, 3/4 in Connection Size (MPN SFI-100-3/4). Key specifications — For Media Type: Glycol; Brand: DWYER; Sight Material: Tempered Glass; Connection Type: FNPT; Flow Direction: Vertical Up; Seal Material: Buna-N; Wetted Material: Tempered Glass.
DWYER Window Sight Flow Indicator with Impeller: Rotor, Bronze, 1/4 in FNPT, 1/4 in Connection Size (MPN SFI-100-1/4). Key specifications — For Media Type: Gear Lube; Brand: DWYER; Sight Material: Tempered Glass; Connection Type: FNPT; Flow Direction: Horizontal Right; Seal Material: Buna-N; Wetted Material: ABS.
Dwyer
DWYER Window Sight Flow Indicator with Impeller: Rotor, Bronze, 1/4 in FNPT, 1/4 in Connection Size (MPN SFI-100-1/4). Key specifications — For Media Type: Gear Lube; Brand: DWYER; Sight Material: Tempered Glass; Connection Type: FNPT; Flow Direction: Horizontal Right; Seal Material: Buna-N; Wetted Material: ABS.
DWYER Window Sight Flow Indicator with Impeller: Rotor, Bronze, 1 1/2 in FNPT, FNPT, Tempered Glass (MPN SFI-300-1-1/2). Key specifications — For Media Type: Hydraulic Oils; Brand: DWYER; Sight Material: Tempered Glass; Connection Type: FNPT; Flow Direction: Vertical Up; Seal Material: Buna-N; Wetted Material: 316 Stainless Steel.
Dwyer
DWYER Window Sight Flow Indicator with Impeller: Rotor, Bronze, 1 1/2 in FNPT, FNPT, Tempered Glass (MPN SFI-300-1-1/2). Key specifications — For Media Type: Hydraulic Oils; Brand: DWYER; Sight Material: Tempered Glass; Connection Type: FNPT; Flow Direction: Vertical Up; Seal Material: Buna-N; Wetted Material: 316 Stainless Steel.
DWYER Window Sight Flow Indicator with Impeller: Rotor, Bronze, 1 in FNPT, 1 in Connection Size (MPN SFI-100-1). Key specifications — For Media Type: Gear Lube; Brand: DWYER; Sight Material: Tempered Glass; Connection Type: FNPT; Flow Direction: Horizontal Right; Seal Material: Buna-N; Wetted Material: Tempered Glass.
Dwyer
DWYER Window Sight Flow Indicator with Impeller: Rotor, Bronze, 1 in FNPT, 1 in Connection Size (MPN SFI-100-1). Key specifications — For Media Type: Gear Lube; Brand: DWYER; Sight Material: Tempered Glass; Connection Type: FNPT; Flow Direction: Horizontal Right; Seal Material: Buna-N; Wetted Material: Tempered Glass.
DWYER Window Sight Flow Indicator with Impeller: Rotor, Bronze, 1 1/4 in FNPT, FNPT, Tempered Glass (MPN SFI-300-1-1/4). Key specifications — For Media Type: Hydraulic Oils; Brand: DWYER; Sight Material: Tempered Glass; Connection Type: FNPT; Flow Direction: Horizontal Left; Seal Material: Buna-N; Wetted Material: Tempered Glass.
Dwyer
DWYER Window Sight Flow Indicator with Impeller: Rotor, Bronze, 1 1/4 in FNPT, FNPT, Tempered Glass (MPN SFI-300-1-1/4). Key specifications — For Media Type: Hydraulic Oils; Brand: DWYER; Sight Material: Tempered Glass; Connection Type: FNPT; Flow Direction: Horizontal Left; Seal Material: Buna-N; Wetted Material: Tempered Glass.

More from Dwyer

View all Dwyer parts →
DWYER Window Sight Flow Indicator with Impeller: Rotor, Bronze, 3/8 in FNPT, 3/8 in Connection Size (MPN SFI-300-3/8). Key specifications — For Media Type: Glycol; Brand: DWYER; Sight Material: Tempered Glass; Connection Type: FNPT; Flow Direction: Vertical Down; Seal Material: Buna-N; Wetted Material: Buna-N.
Dwyer
DWYER Window Sight Flow Indicator with Impeller: Rotor, Bronze, 3/8 in FNPT, 3/8 in Connection Size (MPN SFI-300-3/8). Key specifications — For Media Type: Glycol; Brand: DWYER; Sight Material: Tempered Glass; Connection Type: FNPT; Flow Direction: Vertical Down; Seal Material: Buna-N; Wetted Material: Buna-N.
DWYER Window Sight Flow Indicator with Impeller: Rotor, Bronze, 2 in FNPT, 2 in Connection Size (MPN SFI-100-2). Key specifications — For Media Type: Hydraulic Oils; Brand: DWYER; Sight Material: Tempered Glass; Connection Type: FNPT; Flow Direction: Vertical Down; Seal Material: Buna-N; Wetted Material: PTFE.
Dwyer
DWYER Window Sight Flow Indicator with Impeller: Rotor, Bronze, 2 in FNPT, 2 in Connection Size (MPN SFI-100-2). Key specifications — For Media Type: Hydraulic Oils; Brand: DWYER; Sight Material: Tempered Glass; Connection Type: FNPT; Flow Direction: Vertical Down; Seal Material: Buna-N; Wetted Material: PTFE.
DWYER Window Sight Flow Indicator with Impeller: Rotor, Bronze, 1 1/4 in FNPT, FNPT, Tempered Glass (MPN SFI-100-1-1/4). Key specifications — For Media Type: Glycol; Brand: DWYER; Sight Material: Tempered Glass; Connection Type: FNPT; Flow Direction: Horizontal Right; Seal Material: Buna-N; Wetted Material: ABS.
Dwyer
DWYER Window Sight Flow Indicator with Impeller: Rotor, Bronze, 1 1/4 in FNPT, FNPT, Tempered Glass (MPN SFI-100-1-1/4). Key specifications — For Media Type: Glycol; Brand: DWYER; Sight Material: Tempered Glass; Connection Type: FNPT; Flow Direction: Horizontal Right; Seal Material: Buna-N; Wetted Material: ABS.
DWYER Window Sight Flow Indicator with Impeller: Rotor, Bronze, 1/2 in FNPT, 1/2 in Connection Size (MPN SFI-100-1/2). Key specifications — For Media Type: Water; Brand: DWYER; Sight Material: Tempered Glass; Connection Type: FNPT; Flow Direction: Vertical Down; Seal Material: Buna-N; Wetted Material: Bronze.
Dwyer
DWYER Window Sight Flow Indicator with Impeller: Rotor, Bronze, 1/2 in FNPT, 1/2 in Connection Size (MPN SFI-100-1/2). Key specifications — For Media Type: Water; Brand: DWYER; Sight Material: Tempered Glass; Connection Type: FNPT; Flow Direction: Vertical Down; Seal Material: Buna-N; Wetted Material: Bronze.
DWYER Window Sight Flow Indicator with Impeller: Rotor, Bronze, 1 in FNPT, 1 in Connection Size (MPN SFI-300-1). Key specifications — For Media Type: Hydraulic Oils; Brand: DWYER; Sight Material: Tempered Glass; Connection Type: FNPT; Flow Direction: Vertical Up; Seal Material: Buna-N; Wetted Material: Tempered Glass.
Dwyer
DWYER Window Sight Flow Indicator with Impeller: Rotor, Bronze, 1 in FNPT, 1 in Connection Size (MPN SFI-300-1). Key specifications — For Media Type: Hydraulic Oils; Brand: DWYER; Sight Material: Tempered Glass; Connection Type: FNPT; Flow Direction: Vertical Up; Seal Material: Buna-N; Wetted Material: Tempered Glass.
DWYER Window Sight Flow Indicator with Impeller: Rotor, 316 Stainless Steel, 3/8 in FNPT, FNPT (MPN SFI-300SS-3/8). Key specifications — For Media Type: Non-Corrosive Fluids; Brand: DWYER; Sight Material: Tempered Glass; Connection Type: FNPT; Flow Direction: Vertical Up; Seal Material: Buna-N; Wetted Material: ABS.
Dwyer
DWYER Window Sight Flow Indicator with Impeller: Rotor, 316 Stainless Steel, 3/8 in FNPT, FNPT (MPN SFI-300SS-3/8). Key specifications — For Media Type: Non-Corrosive Fluids; Brand: DWYER; Sight Material: Tempered Glass; Connection Type: FNPT; Flow Direction: Vertical Up; Seal Material: Buna-N; Wetted Material: ABS.
DWYER Window Sight Flow Indicator with Impeller: Rotor, Bronze, 3/4 in FNPT, 3/4 in Connection Size (MPN SFI-300-3/4). Key specifications — For Media Type: Water; Brand: DWYER; Sight Material: Tempered Glass; Connection Type: FNPT; Flow Direction: Vertical Up; Seal Material: Buna-N; Wetted Material: PTFE.
Dwyer
DWYER Window Sight Flow Indicator with Impeller: Rotor, Bronze, 3/4 in FNPT, 3/4 in Connection Size (MPN SFI-300-3/4). Key specifications — For Media Type: Water; Brand: DWYER; Sight Material: Tempered Glass; Connection Type: FNPT; Flow Direction: Vertical Up; Seal Material: Buna-N; Wetted Material: PTFE.
DWYER Window Sight Flow Indicator with Impeller: Rotor, Bronze, 1 1/2 in FNPT, FNPT, Tempered Glass (MPN SFI-100-1-1/2). Key specifications — For Media Type: Glycol; Brand: DWYER; Sight Material: Tempered Glass; Connection Type: FNPT; Flow Direction: Vertical Up; Seal Material: Buna-N; Wetted Material: Buna-N.
Dwyer
DWYER Window Sight Flow Indicator with Impeller: Rotor, Bronze, 1 1/2 in FNPT, FNPT, Tempered Glass (MPN SFI-100-1-1/2). Key specifications — For Media Type: Glycol; Brand: DWYER; Sight Material: Tempered Glass; Connection Type: FNPT; Flow Direction: Vertical Up; Seal Material: Buna-N; Wetted Material: Buna-N.