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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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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

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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 probe material is used in the Dwyer A-491?

The A-491 features a stainless steel 304 probe with a stainless steel 303 barbed fitting for 3/16 inch ID tubing. The mounting flange is stainless steel 430. Available lengths: 101 mm, 152 mm, and 203 mm.

What applications is the Dwyer A-491 designed for?

The A-491 is ideal for duct-mounted pressure sensing in HVAC and industrial ducting systems. The barbed 3/16 inch connection integrates with standard low-pressure tubing for real-time air and gas flow measurement in ventilation and process systems.

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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