Dwyer

Handheld Digital Manometer

Series 477

 

Selectible Pressure Units, ±0.5% Accuracy





- Instant Selection from up to Nine English/Metric Units.

- Stores 20 Readings in Memory for Later Reference.

- Measures Positive, Negative or Differential Pressures.

- Large Easy-to-Read 0.4" LCD Display Includes Switchable
   Back-light for Great Visibility-Anywhere!

- Both Audible and Visual Overpressure Alarms.

- Includes + and - Indicators plus Low Battery Warning.

- Operates up to 100 Hours on one 9 Volt Battery.


Series 477 Handheld Digital Manometers are packed with features you need to make low pressure measurement and recording faster, easier and more accurate than ever.
Now you can instantly select from up to nine popular pressure units without having to waste time with tedious conversions.
Plus, a versatile non-volatile memory function enables storage of up to 20 readings - perfect for HVAC technicians making Pilot tube traverses of airflow through ducts.
A display HOLD key temporarily freezes the current value for situations where pressure fluctuates.
To protect against overpressure, both usual and audible alarms are included. Audible alarm also sounds to indicate a value has been stored in memory.

 

Stocked   Models

Model No.

English Range

Metric Range

Maximum Pressure

477-1

0-20 in H2O

0-5kPa

11 psi (0.75 bar)

477-2

0-40 in H2O

0-10kPa

11 psi (0.75 bar)

477-3

0-200 in H2O

0-50kPa

29 psi (1.99 bar)

477-4

0-10 psid

0-70kPa

58 psi (3.99 bar)

477-5

0-30 psid

0-200kPa

58 psi (3.99 bar)


Pressure Units Available

Model  No.

PSID

in. H20

mmH20

in.Hg

mmHg

Pa

kPa

bar

Mbar

477-1

0

0

0

0

0

0

0

0

0

477-2

0

0

0

0

0

0

0

0

0

477-3

0

0

0

0

0

 

0

0

0

477-4

0

0

0

0

0

 

0

0

0

477-5

0

0

 

0

0

 

0

0

0


Specifications

Accuracy

±0.5% of full scale from 60 to 78°F (15 to 25°C); ±1% of full scale from 32 to 60, 78 to 104°F (0 to 15, 25 to 40°C).

Storage Temperature

-4 to 176°F (-20 to 80°C)

Pressure hysteresis

±0.1% of full scale

Maximum Pressure

See chart

Pressure Connections

Barbed, for 1/8" or 3/16" I.D. tubing

Power Source

9V alkaline battery, included

Battery Life

Up to 100 hours of operation. Less when LCD backlight is used.

Pressure Display

0.4" liquid crystal

Size

6 9/16"H x 2 13/16"W x 29/32"D (166x71x23 mm)

Weight, Battery Included

12 ounces (340 grams)

A-402 Carrying Pouch - Tough gray nylon pouch protects any Series 475 or 477 manometer and includes convenient side compartment for tubing and other accessories. Both areas are fully zippered for easy access. With belt loop, hand strap and adjustable shoulder strap. 7"x4 1/2"x3" (178x114x76 mm).



         

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