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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
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Local availability & support — Singapore

Local office
20 Woodlands Link #09-05, Singapore 738733
Phone
+65 8878 8355
Delivery
Same-day or next-business-day delivery within Singapore for in-stock items; 7–14 days for factory-order parts from Europe.
Payment
Invoicing in SGD. PayNow, bank transfer, and corporate PO accepted.
Ships to
Singapore

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)
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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
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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.

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