Digital

Digital portable indicators for the difference between two pressures. They can also be used for single pressure. Dwyer's digital manometers are versatile, handheld, and battery operated manometers. Manometers are useful in a wide variety of applications. Some units are constructed of an extruded aluminum case for exceptional durability.

Series 475 Intrinsically Safe Handheld Digital Manometer

Ranges from 1" w.c. to 150 psid, ±0.5% Accuracy

The SERIES 475 Handheld Digital Manometer measures positive, negative, or differential pressures of air and natural gases in ranges from 1 in w.c. (0.249 kPa) to 150 psid (10.34 bar). The dual push pads on the front panel control the on/off, auto zero, and pressure unit selection, allowing for simple operation with no set up needed. When used with a Dwyer® Pitot tube, the Series 475 can also be used as an air velocity gage.

Product Applications

Monitoring natural gas pressures on boilers and other combustion equipment
Air velocity monitoring, when used with a Dwyer® Pitot tube and AV calculator
Field calibration of other instruments
Monitoring or troubleshooting HVAC systems

Models & Ordering

Model	Description
475-000-FM	Handheld digital manometer, range 0-1.000" w.c. (.2491 kPa), max. pressure 5 psig.
475-00-FM	Handheld digital manometer, range 0-4.000" w.c. (0.996 kPa), max. pressure 5 psig.
475-0-FM	Handheld digital manometer, range 0-10.00" w.c. (2.491 kPa), max. pressure 5 psig.
475-1-FM	Handheld digital manometer, range 0-20.00" w.c. (4.982 kPa), max. pressure 10 psig.
475-2-FM	Handheld digital manometer, range 0-40.00" w.c. (9.96 kPa), max. pressure 10 psig.
475-3-FM	Handheld digital manometer, range 0-200.0" w.c. (49.82 kPa), max. pressure 30 psig.
475-4-FM	Handheld digital manometer, range 0-10.00 psi (.6895 bar), max. pressure 30 psig.
475-5-FM	Handheld digital manometer, range 0-20.00 psi (1.379 bar), max. pressure 60 psig.
475-6-FM	Handheld digital manometer, range 0-30.00 psi (2.069 bar), max. pressure 60 psig.
475-7-FM	Handheld digital manometer, range 0-100.0 psi (6.895 bar), max. pressure 150 psig.
475-8-FM	Handheld digital manometer, range 0-150.0 psi (10.34 bar), max. pressure 200 psig.

Series 476A Single Pressure & Series 478A Digital Manometer

Single & Dual Pressure Measurement, Electronic Zeroing, ±1.5% Accuracy

The Series 476A Single Pressure Differential Pressure Digital Manometer can be used to measure low pressures from -20 to 20 in w.c. with ±1.5% FS accuracy. TheSeries 478A Single Pressure Differential Pressure Digital Manometer can be used to measure positive, negative, or differential pressures. Both units are constructed of an extruded aluminum case for exceptional durability.

Product Applications

Verify field instrumentation performance
Adjust fuel mixture on combustion systems

Models & Ordering

Model	Description
476A-0	Digital manometer, range -20 to 20" w.c.

Series 477AV Handheld Digital Manometer

Measures Pressure, Flow and Velocity; ±0.5% Accuracy

The SERIES 477AV Handheld Digital Manometer is now available with pressure, flow, and velocity measurements along with a number of other convenient features. The built-in air velocity and flow calculations provide accuracy and conserve time and error associated with manual calculations. Also featured on this unit are adjustable zero and span values for calibrating in the field, as well as a damping feature to compensate for the fluctuating of readings.

Product Applications

Air flow monitoring
Duct static pressure

Models & Ordering

Model	Description
477AV-0	Digital manometer, range 0-10.00" w.c., air velocity/flow modes.
477AV-00	Digital manometer, range 0-4.00" w.c., air velocity/flow modes.
477AV-000	Digital manometer, range 0-1.00" w.c., air velocity/flow modes.
477AV-1	Digital manometer, range 0-20.00" w.c., air velocity/flow modes.
477AV-2	Digital manometer, range 0-40.00" w.c., air velocity/flow modes.
477AV-3	Digital manometer, range 0-200.00" w.c., air velocity/flow modes.
477AV-4	Digital manometer, range 0-10.00 psi, air velocity/flow modes.
477AV-5	Digital manometer, range 0-20.00 psi, air velocity/flow modes.
477AV-6	Digital manometer, range 0-30.00 psi, air velocity/flow modes.
477AV-7	Digital manometer, range 0-100.00 psi, air velocity/flow modes.
477AV-8	Digital manometer, range 0-150.00 psi, air velocity/flow modes.

Series 477B Handheld Digital Manometer

Precise Air Pressure Measurement, ±0.1% F.S. Accuracy

The SERIES 477B Handheld Digital Manometers are versatile, hand-held, battery operated manometers available in several basic ranges from 0-20 in w.c. up to 100 psi. All models measure either positive, negative or differential pressures with ±0.10% of full scale accuracy. You can select from up to seven common English and metric pressure units so conversions are not necessary. A memory function allows storage of up to 40 readings for later recall and a backlight provides auxiliary lighting for hard-to-see locations. Also standard are a hold feature plus both visual and audible overpressure alarms.

Product Applications

Lab calibration of other pressure instruments
Air velocity/air flow measurements in commercial buildings

Models & Ordering

Model	Description
477B-1	Handheld digital manometer, 0 to 20" w.c. (0 to 4.982 kPa)
477B-2	Handheld digital manometer, 0 to 40" w.c. (0 to 9.96 kPa)
477B-3	Handheld digital manometer, 0 to 200" w.c. (0 to 49.82 kPa)
477B-4	Handheld digital manometer, 0 to 10 psi (0 to 68.95 kPa)
477B-5	Handheld digital manometer, 0 to 30 psi (0 to 206.9 kPa)
477B-6	Handheld digital manometer, 0 to 50 psi (0 to 344.7 kPa)
477B-7	Handheld digital manometer, 0 to 100 psi (0 to 689.5 kPa)

Series 490A Hydronic Differential Pressure Manometer

Liquid & Gas Pressure Measurement, ±0.5% FS

Accuracy

Series 490A Hydronic Differential Pressure Manometer

The SERIES 490A Hydronic Differential Pressure Manometers are versatile, handheld, battery operated manometers available in several basic ranges for positive or positive differential pressure measurement and can tolerate most liquid media compatible with 316LSS. A new feature added to the Series 490A is a field adjustable damping, which allows the user to choose the level of display averaging rate corresponding to the fluctuation level common in many applications.

NEW! 490A-HKIT Option is located in the Product Configurator.

Hydronic meter kit includes: (2) six foot high-pressure rated tubing with shut off valves, high pressure 3-way valve, 8 ft poly tubing for purges, hard travel case, handheld carrying strap, 1/16" x 1 1/2", 1/8" x 3" and 1/8" x 1-1/2" pairs of pressure probes, 90° Flare to 1/4" NPT fittings, adjustable 8" wrench, PTFE Tape, and magnetic protective rubber boot. NIST Calibration Certificate comes standard.

Dwyer Instruments, Inc. was recognized for excellence in product design in the 14th annual Dealer Design Awards Program sponsored by The Air Conditioning Heating & Refrigeration News magazine (The ACHR News). An independent panel of contractors acted as judges in the contest that had 81 entries. The company’s Series 490A-HKit Hydronic Differential Pressure Manometer was the Bronze Award Winner in the Electronic and Hand Tools category. The ACHR News is the leading trade magazine in the heating, ventilating, air conditioning, and refrigeration industries. To read the full announcement please visit http://www.dwyer-inst.com/2017DDABronzeWinner.

Product Applications

Chiller to coils for freeze protection
Hydronic valve balancing
Measure pressure drop across pumps
Refrigerant pressure testing

Models & Ordering

Model	Description
490A-1	Wet/Wet handheld digital manometer, 0 to 15 psi (0 to 103.4 kPa)
490A-2	Wet/Wet handheld digital manometer, 0 to 30 psi (0 to 206.9 kPa)
490A-3	Wet/Wet handheld digital manometer, 0 to 50 psi (0 to 344.8 kPa)
490A-4	Wet/Wet handheld digital manometer, 0 to 100 psi (0 to 689.5 kPa)
490A-5	Wet/Wet handheld digital manometer, 0 to 500 psi (0 to 3448 kPa)
490A-6	Wet/Wet handheld digital manometer, 0 to 200 psi (0 to 1379 kPa)

High Accuracy (0.2%, 0.1% or 0.05%), Differential, Gage or Absolute

THE SERIES HM28 DIGITAL HAND-HELD MANOMETERM is a precision instrument designed to measure a wide range of pressures to a very high accuracy. The unit incorporates a variety of features in an easy to use format that makes it useful in a wide variety of applications. Features include: measurement in all common pressure ranges, display resolution to 0.001, differential or relative measurement, two line liquid crystal display, and adjustable auto power off to conserve battery. We are so proud of the accuracy of the HM28 that we provide a certificate of calibration with the unit at no additional cost. Depending on your application, the HM28 can be used as a secondary calibration standard for your other pressure instrumentation.

Product Applications

Calibration facilities
Laboratories

Models & Ordering

Model	Description
HM28D3B10000	Handheld digital manometer, range 0-10" w.c.(2.5 kPa).
HM28D3C10000	Handheld digital manometer, range 0-28" w.c. (7 kPa).
HM28D3F10000	Handheld digital manometer, range 0-120" w.c. (30 kPa).
HM28D3H10000	Handheld digital manometer, range 0-14.5 psi (100 kPa).

Series HM35 Precision Digital Pressure Manometer

Up to 0.05% Accuracy, Graphical Display, Data Logging Capability

THE HIGH PRECISION SERIES HM35 DIGITAL MANOMETER is designed to reliably measure and log pressure measurements for critical applications. This family of manometer can measure absolute pressure, differential pressure or gage pressure with up to 0.05% accuracy. The data logging function can store up to 10,742 readings and transmit the readings to a PC through an IR serial port. The large display can graphically display trends in the data as well as peaks and valleys. The series HM35 comes standard with a calibration certificate so that the instrument can be used as a secondary calibration standard when testing other pressure instrumentation. This manometer is ideal for laboratories, calibration facilities, and other critical pressure applications.

Product Applications

Calibration facilities
Laboratories

Models & Ordering

Model	Description
HM3531DLC100	Differential pressure manometer, range 0-28" w.c., 0.05% accuracy.
HM3531DLF100	Differential pressure manometer, range 0-120" w.c., 0.05% accuracy.
HM3531DLH100	Differential pressure manometer, range 0-14.5 psi, 0.05% accuracy.
HM3531DLJ100	Differential pressure manometer, range 0-29 psi, 0.05% accuracy.
HM3531DLK100	Differential pressure manometer, range 0-108 psi, 0.05% accuracy.
HM3531DLM110	Differential pressure manometer, range 0-245 psi, 0.05% accuracy.

Series WDPM Differential Pressure Modules

Wireless, Measures Differential Pressure, Air Velocity, and Flow

Series WDPM Wireless Differential Pressure Modules for use with the Model UHH handheld meter and the Mobile Meter® Software Test Instrument Mobile App.

Download the Mobile Meter® Software Test Instrument Mobile App which converts Android® based phones and tablets into a multi-function test instrument.

Product Applications

Building commissioning
Building HVAC test and balance
Critical environment testing
Industrial process verification
Instrumentation validation

Models & Ordering

Model	Description
WDPM-002	Wireless DP Module ± 2" w.c. (± 500 Pa)
WDPM-005	Wireless DP Module ± 5" w.c. (± 1250 Pa)
WDPM-010	Wireless DP Module ± 10" w.c. (± 2.5 kPa)
WDPM-020	Wireless DP Module ± 20" w.c. (± 5 kPa)
WDPM-030	Wireless DP Module ± 30" w.c. (± 7.5 kPa)
WDPM-100	Wireless DP Module ± 100" w.c. (± 25 kPa)
WDPM-200	Wireless DP Module ± 200" w.c. (± 50 kPa)
WDPM-350	Wireless DP Module ± 350" w.c. (± 87 kPa)