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Dwyer Digital pressure gauge 0-500Mbar Dwyer 477AV-3

Dwyer 477AV-3 is a digital pressure gauge measuring air and compatible gases from 0–500 mbar with ±0.5% FS accuracy. Operating range spans 0 to 140°F, storing up to 40 readings. Ideal for HVAC, pneumatic systems, and…

SKU 3G-CBM-04574

Also listed as: MES 25003 · MES-25003

Brand

Dwyer

Item

Digital pressure gauge 0-500Mbar Dwyer 477AV-3

Local availability & support — the Philippines

Delivery: 5–8 business days door-to-door; Bureau of Customs clearance typically 2–4 business days.
Payment: Invoicing in PHP or USD. Bank transfer and corporate PO accepted.
Ships to: Manila, Quezon City, Cebu, Davao, Batangas

Technical Specifications

Dwyer

service

air and compatible gases 

accuracy

±0.5% FS 

pressure range

0-500 mbar 

units pressure

in w.c., ft w.c., in Hg, psi, oz/in2, mm w.c., cm w.c., mm Hg, mbar, Pa, kPa, hPa 

storage capacity

40 readings 

temperature operating

0 to 140°F (-17.8 to 60°C) 

temperature compensated

32 to 104°F (0 to 40°C) 

Datasheet Content

TEST & DATA
        SERIES 477AV

        HANDHELD DIGITAL MANOMETER
        Measures Pressure, Flow and Velocity; ±0.5% Accuracy
                                                                                                                                     2-13/16 [71.44]
                                                                                                                                          1-1/16
                                                                                                                                         [26.99]
                                                                                                                            41/64
                                                                                                                           [16.27]
                                                                                                                                                            BARBED FOR
                                                                                                                                                            1/8 OR 3/16
                                                                                                                                                            ID TUBING




                                                                                                                                                        5-57/64
                                                                                                                                                        [149.68]




            VIDEO ON

                   LINE


                                                                                                                  29/32
                                                                                                                 [23.02]

        The Series 477AV Handheld Digital Manometer is now available with pressure, flow,          SPECIFICATIONS
        and velocity measurements along with a number of other convenient features. The            Service: Air and compatible gases.      Units of Pressure: in w.c., ft w.c., in Hg,
        built-in air velocity and flow calculations provide accuracy and conserve time and error   Wetted Materials: Consult factory.      psi, oz/in2, mm w.c., cm w.c., mm Hg,
        associated with manual calculations. Also featured on this unit are adjustable zero and    Accuracy: ±0.5% FS, 60 to 78°F (15.6    mbar, Pa, kPa, hPa.
        span values for calibrating in the field, as well as a damping feature to compensate for   to 25.6°C); ±1.5% FS from 32 to 60°F    Units of Velocity: fpm, fps, mph, m/h,
        the fluctuating of readings.                                                               and 78 to 104°F (0 to 15.6°C and 25.6   m/s, k/h, knot.
                                                                                                   to 40.0°C).                             Units of Flow: cfm, m3/h, m3/s.
        FEATURES/BENEFITS                                                                          Pressure Hysteresis: ±0.1% FS.          Power Requirements: 9 V alkaline
        • Calculates and displays air velocity and volumetric air flow                             Pressure Limits: See chart.             battery, installed non-functional, user
        • Rugged aluminum case protects instrument from damage during transport/use                Temperature Limits: 0 to 140°F (-17.8   replaceable.
        • 9 selectable English and metric engineering units                                        to 60°C).                               Weight: 10.2 oz (289 g).
        • Large, easy to read display with backlight for use in dark areas                         Compensated Temperature Limits: 32      Process Connections: Two barbed
        • Stores up to 40 readings with minimum, maximum and average statistics                    to 104°F (0 to 40°C).                   connections for use with 1/8˝ (3.18
                                                                                                   Storage Temperature Limits: -4 to       mm) or 3/16˝ (4.76 mm) ID tubing. Two

                                                                                                                                                                                         Manometers,
        APPLICATIONS                                                                               176°F (-20 to 80°C).                    compression fittings for use with 1/8˝
        • Air flow monitoring                                                                      Display: 0.42˝ (10.6 mm) 4 digit LCD.   (3.18 mm) ID x 1/4˝ (6.35 mm) OD tubing

                                                                                                                                                                                          Portable
        • Duct static pressure                                                                     Resolution: See chart.                  for 477AV-7 and 477AV-8 only.
                                                                                                                                           Agency Approvals: CE.

         MODEL CHART
                                      Velocity Range       Available Pressure Units
                   Pressure                                                       in    mm         mm                                      cm    Maximum
         Model     Range              fpm     m/s          psi     in Hg kPa      w.c. Hg     mbar w.c. Pa             ft w.c. oz/in2 hPa w.c. Pressure
         477AV-000 0 to 1.000 in w.c. 4004    20.34        -       0.0736 0.2491 1.000 1.868 2.491 25.40 249.1         0.0833 0.5780 2.491 2.540 5 psig
         477AV-00 0 to 4.000 in w.c. 8009     40.69        0.1445 0.2942 0.996 4.000 7.473 9.96 101.6 996              0.3333 2.312 9.964 10.16 5 psig
         477AV-0   0 to 10.00 in w.c. 1.266k 64.33         0.3613 0.7355 2.491 10.00 18.68 24.91 254.0 2491            0.8333 5.780 24.91 25.40 5 psig
         477AV-1   0 to 20.00 in w.c. 1.791k 90.97         0.7225 1.471 4.982 20.00 37.36 49.82 508.0 4982             1.667 11.56 49.82 50.80 10 psig
         477AV-2   0 to 40.00 in w.c. 25.33k 128.7         1.445 2.942 9.96       40.00 74.73 99.6 1016 9964           3.333 23.12 99.64 101.6 10 psig
         477AV-3   0 to 200.0 in w.c. 56.63k 287.7         7.225 14.71 49.82 200.0 373.6 498.2 5080 -                  16.67 115.6 498.2 508.0 30 psig
         477AV-4   0 to 10.00 psi     66.62k 338.4         10.00 20.36 68.95 276.8 517.1 689.5 7031 -                  13.07 160.0 689.5 703.1 30 psig
         477AV-5   0 to 20.00 psi     94.22k 478.6         20.00 40.72 137.9 553.6 1034 1379 -           -             46.13 320.0 1379 1406 60 psig
         477AV-6   0 to 30.00 psi     115.4k 586.2         30.00 61.08 206.9 830.4 1551 2069 -           -             69.20 480.0 2068 2109 60 psig
         477AV-7   0 to 100.0 psi     210.7k 1070          100.0 203.6 689.5 2768 5171 6895 -            -             230.7 1600 6895 7031 150 psig
         477AV-8   0 to 150.0 psi     258.0k 1311          150.0 305.4 1034 4152 7757 -            -     -             346.0 2400 -        -     200 psig


         OPTIONS
         To order add suffix: Description
         -NIST                NIST traceable calibration certificate
         Example: 477AV-1-NIST


         ACCESSORIES
         Model      Description
         A-402A     Carrying case; tough gray nylon pouch protects any Series
                    477AV Manometer; double zippered for quick and easy
                    access, with a belt loop that snaps closed; 7-1/2˝H x 3˝W x
                    2-1/4˝D (191 x 76 x 57 mm)
         UHH-C1     Soft carrying case                                                         A-402A         UHH-C1               A-47X-BOOT
         A-47X-BOOT Protective magnetic rubber boot                                                                           (manometer not included)

                                                                                                                           DWYER INSTRUMENTS, INC. | dwyer-inst.com 171



TestData_2021.indb 171                                                                                                                                                           7/15/20 2:11 PM

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3G Electric (S) Pte. Ltd. — Singapore

Product Description

Supplied to the Philippines — compatible with 60 Hz installations. DHL Express delivery to Manila, Quezon City, Cebu, customs and duties handled door-to-door.

Frequently Asked Questions

Where can I buy the Dwyer 477AV-3 digital pressure gauge in the Philippines?

3G Electric Philippines stocks and supplies the Dwyer 477AV-3. We deliver to Manila, Quezon City, and CALABARZON regions. We handle Bureau of Customs documentation, logistics coordination, and PHP invoicing. Contact us for availability and lead time.

What is the lead time and shipping for the Dwyer 477AV-3 to the Philippines?

Lead time depends on stock status and is confirmed on request. 3G Electric arranges all logistics to your Philippines location, manages customs clearance, and provides tracking. Request a quote for exact delivery schedule.

What pressure ranges and units does the Dwyer 477AV-3 measure?

The Dwyer 477AV-3 measures 0–500 mbar with ±0.5% FS accuracy. It displays in multiple units: psi, kPa, mbar, in Hg, mm Hg, in w.c., ft w.c., cm w.c., mm w.c., Pa, and hPa—ideal for HVAC and pneumatic system diagnostics.

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 measurement. We supply genuine products with in-stock availability on common SKUs, technical documentation, commissioning support, and warranty service — worldwide.

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