Send a part number, a photo, or a whole BOM — we supply it and stand behind it. EXW Singapore — collect from our office.

3G Electric
Image not available
DwyerMeasurement

Dwyer Static pressure tap stainless A-491

Dwyer A-491 static pressure tap measures air and gas flow in HVAC and industrial ducting systems. Features stainless steel 304 probe construction with barbed fitting for 3/16" ID tubing, available in lengths up to…

SKU 3G-CBM-02383

Also listed as: A 491 · A-491

Brand
Dwyer
Item
Static pressure tap stainless A-491
Part Number
A491
Category
Measurement
UNSPSC
41112412 — Pressure gauge
Available to Order
Trade pricing by quote — replies within 24h
Qty
WhatsApp an engineerMessage via Telegram
No account needed — your quote request goes straight to our engineers. A free account lets you track quotes and re-order faster.
EXW Singapore
Collect or forward from our office
Datasheet on Request
Technical specs
1-Day Quote
Replies within 24h

Local availability & support — Singapore

Local office
20 Woodlands Link #09-05, Singapore 738733
Phone
+65 8878 8355
Payment
Invoicing in SGD. PayNow, bank transfer, and corporate PO accepted.

Technical Specifications

Dwyer
Manufacturer Part Number
A491
connection
barbed fitting for 3/16" ID tubing
material probe
stainless steel 304
material flange
stainless steel 430
material fitting
stainless steel 303
available lengths mm
101, 152, 203

Technical Documents

(1)
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

Dwyer A-491 static pressure tap measures air and gas flow in HVAC and industrial ducting systems. Features stainless steel 304 probe construction with barbed fitting for 3/16" ID tubing, available in lengths up to 203 mm. Ideal for duct-mounted pressure sensing applications.

Frequently Asked Questions

What is the Dwyer A-491 static pressure tap used for?

The Dwyer A-491 static pressure tap measures static air and gas pressure in HVAC and industrial ducting systems. It is commonly used for differential pressure sensing across filters and cooling coils, ensuring accurate readings in duct-mounted applications.

What are the specifications of the Dwyer A-491 static pressure tap?

The Dwyer A-491 features a stainless steel 304 probe, stainless steel 430 flange, and stainless steel 303 barbed fitting for 3/16" ID tubing. Available lengths are 101 mm, 152 mm, and 203 mm. It is designed for duct-mounted pressure sensing with a straight probe configuration.

Where to buy the Dwyer A-491 static pressure tap in Singapore?

3G Electric supplies the Dwyer A-491 static pressure tap to Singapore. We handle logistics, customs clearance, and delivery to your facility. Contact us for pricing and lead time on this Dwyer model.

How to install the Dwyer A-491 static pressure tap?

Install the Dwyer A-491 by mounting it on the duct using the included flange with rubber gasket and two screws. Connect 3/16" ID tubing to the barbed fitting. For accurate static pressure readings, position the probe away from duct walls to minimize turbulence effects.

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
Not sure this is the right part? Photo-identify it→

Dwyer Products

3G Electric supplies Dwyer measurement. 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 →

Related products

More from Dwyer

View all Dwyer parts →
Magnehelic pressure gauge 2300-60 Pa
Dwyer
Magnehelic pressure gauge 2300-60 Pa
Dwyer
Dwyer
Metal average flow probe MAFS-16
Dwyer
Dwyer
S2-1A surface temperature probe
Air flow controller AAFS
Dwyer
Air flow controller AAFS
Dwyer
Dwyer
Current detector SCS-111100-R
Dwyer
Dwyer
Outside temperature probe TE-OND-B
Current detector SCS-211125
Dwyer
Current detector SCS-211125
Dwyer
Dwyer
Wall temperature probe TE-NND-C

Customer reviews

No reviews yet — be the first

Questions & answers

No questions yet — ask us the first