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Handheld digital manometer with 4-digit LED display

Dwyer

Dwyer 477AV-2 Digital Manometer 0-40.00" w.c. Air

SKU CH-EH2H-T7HH1

Measures air pressure from 0 to 40.00 in wc with ±0.5% accuracy and reads velocity up to 25,330 fpm on a 4-digit LED display

  • Product typeEnvironmental & Mechanical
  • Measures air pressure up to 40.00 in wc
  • Accuracy within .5 percent of reading
  • Displays air velocity up to 25,330 fpm
  • Ready to use with batteries included
  • Connects via 1/8 in or 3/16 in hose barbs

Handheld Digital Manometer for Air Pressure

The Dwyer 477AV-2 measures air pressure from 0 to 40.00 inches water column with a stated accuracy of ±0.5 percent. It is built for HVAC technicians, facility engineers and field inspectors who need a portable instrument for verifying duct static pressure, filter loading or fan performance.

Battery powered with hose barb connections

The unit ships with batteries installed so it operates immediately without an external supply. Dual hose barbs accept 1/8 inch and 3/16 inch tubing, letting the meter connect directly to existing pressure taps or pitot tubes without extra fittings or adapters.

Four digit LED display reads velocity and pressure

The onboard display shows pressure in inches water column and converts the reading to air velocity up to 25,330 feet per minute. No NIST traceable certificate is included, so users requiring calibrated documentation for compliance must arrange separate certification.

How it compares

Measured against everything we stock in Test Equipment & Meters, at today’s prices. Recalculated every night.

Price $276.99
Pricier than about 81% of the 202 comparable items (median $148.99).

Specifications

Product
Brand nameDWYER INSTRUMENTS
Product typeEnvironmental & Mechanical

Questions about this item

What is the accuracy limit of the 477AV-2 when measuring pressure continuously?

The manometer maintains a pressure accuracy of +/- .5 percent across the 0 to 40.00 in wc range during sustained use.

How much heat or noise does the Dwyer 477AV-2 generate during all-day operation?

As a battery-powered handheld instrument with a 4-digit LED display, it produces no measurable heat or audible noise during continuous operation.

What hose sizes must I already have to connect to the 1/8 in and 3/16 in barbs?

You need tubing with 1/8 in or 3/16 in inner diameter to fit the hose barb process connections on this unit.

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