Series 400 Air Velocity Meter

Series 400 Air Velocity Meter

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.

NIST CALIBRATION available in Product Configurator.

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
Starting at $218.00
Filter By
Grouped product items
Model Description Availability* Qty Price
475-0-FM Handheld digital manometer, range 0-10.00" w.c. (2.491 kPa), max. pressure 5 psig. 1-3 days*
$303.00
475-0-FM-AV Air velocity kit, range 0-10.00" w.c. (2.491 kPa), max. pressure 5 psig, kit includes static pressure tips, rubber tubing, Pitot tube, step drill, air velocity slide chart and carrying case. 2-3 Weeks*
$542.00
475-00-FM Handheld digital manometer, range 0-4.000" w.c. (0.996 kPa), max. pressure 5 psig. 1-3 days*
$303.00
475-00-FM-AV Air velocity kit, range 0-4.000" w.c. (0.996 kPa), max. pressure 5 psig, kit includes static pressure tips, rubber tubing, Pitot tube, step drill, air velocity slide chart and carrying case. 2-3 Weeks*
$542.00
475-000-FM Handheld digital manometer, range 0-1.000" w.c. (.2491 kPa), max. pressure 5 psig. 1-3 days*
$403.00
475-1-FM Handheld digital manometer, range 0-20.00" w.c. (4.982 kPa), max. pressure 10 psig. 1-3 days*
$303.00
475-1-FM-AV Air velocity kit, range 0-20.00" w.c. (4.982 kPa), max. pressure 10 psig, kit includes static pressure tips, rubber tubing, Pitot tube, step drill, air velocity slide chart and carrying case. 2-3 Weeks*
$542.00
475-1T-FM-AV Air velocity kit, range 0-20.00" w.c. (4.982 kPa), max. pressure 10 psig, kit includes static pressure tips, rubber tubing, telescoping Pitot tube, step drill, air velocity slide chart and carrying case. 1-3 days*
$690.00
475-2-FM Handheld digital manometer, range 0-40.00" w.c. (9.96 kPa), max. pressure 10 psig. 1-3 days*
$218.00
475-3-FM Handheld digital manometer, range 0-200.0" w.c. (49.82 kPa), max. pressure 30 psig. 1-3 days*
$218.00
475-4-FM Handheld digital manometer, range 0-10.00 psi (.6895 bar), max. pressure 30 psig. 1-3 days*
$218.00
475-5-FM Handheld digital manometer, range 0-20.00 psi (1.379 bar), max. pressure 60 psig. 1-3 days*
$218.00
475-6-FM Handheld digital manometer, range 0-30.00 psi (2.069 bar), max. pressure 60 psig. 1-3 days*
$218.00
475-7-FM Handheld digital manometer, range 0-100.0 psi (6.895 bar), max. pressure 150 psig. 1-3 days*
$218.00
475-8-FM Handheld digital manometer, range 0-150.0 psi (10.34 bar), max. pressure 200 psig. 1-3 days*
$218.00

Specifications

Service:
Air and compatible combustible gases.
Wetted Materials:
Consult factory.
Accuracy:
±0.5% FS, 60 to 78°F (15.6 to 25.6°C); ±1.5% FS from 32 to 60°F and 78 to 104°F (0 to 15.6°C and 25.6 to 40°C).
Pressure Hysteresis:
±0.1% of FS.
Pressure Limits:
See catalog page.
Temperature Limits:
0 to 140°F (-17.8 to 60°C).
Compensated Temperature Limits:
32 to 104°F (0 to 40°C).
Storage Temperature Limits:
-4 to 176°F (-20 to 80°C).
Display:
0.42" (10.6 mm) 4-digit LCD.
Resolution:
See Ordering page.
Power Requirements:
9 V alkaline battery, installed non-functional, user replaceable.
Process Connections:
Two barbed connections for use with 1/8" (3.18 mm) or 3/16" (4.76 mm) I.D. tubing. Two compression fittings for use with 1/8" (3.18 mm) I.D. x 1/4" (6.35 mm) O.D. tubing for 475-7 & 475-8 only.
Weight:
10.8 oz. (306 g).
Compliance:
CE, FM approved to Class I, Div 2, Groups A, B, C, D, T4 Ta = 70°C.

Features

  • Rugged aluminum case protects instrument from damage during transport/use
  • Large, easy to read LCD and simple operation
  • FM approved to be intrinsically safe in hazardous locations, Class 1, Div 2, Groups A, B, C, D, T4 Ta = 70°C

Options

  • Air Velocity (-AV)
    Kit includes: Model 475 Digital Manometer, Pitot Tube, two No. A-303 static pressure tips with magnetic mounting, 3/16" I.D. rubber tubing,
    No. A-397 step drill for 3/16" - 1/2" holes in 1/16" increments, No. A-532 AV slide chart, 9 volt battery, and fitted polyethylene case.

Product Literature

Manuals

Catalog Pages

SlideShare

Model Chart

    475-X-FM-OPT      475 MANOMETER
         
          1ST SYMBOL (1ST X) RANGE
           000     1.00  INWC / .249 KPA
            00     4.00  INWC / .995 KPA
             0     10.0  INWC / 2.49 KPA
             1     19.99 INWC / 4.97 KPA
             2     40.0  INWC / 9.95 KPA
             3     199.9 INWC / 49.7 KPA
             4     10.0  PSI  / .689 BAR
             5     19.99 PSI  / 1.37 BAR
             6     30.0  PSI  / 2.07 BAR
             7     100   PSI  / 6.89 BAR     NOT VALID W/ AV,T
             8     150   PSI / 10.34 BAR     NOT VALID W/ AV,T

          OPTIONS (OPT) KITS
             -NIST  NIST TRACEABLE CALIBRATION CERTIFICATE
             -AV    AV KIT OPTION
             -T     TELESCOPING PITOT TUBE

Questions

Question
What's the sample rate of the 475 digital manometer series? Is there an average function of the the past samples?
Answer
The sample rate is 1 reading per second. There is no average function of past samples.
Question
We use series 475-6-FM Mk III digital manometer. What is the recommended calibration interval?
Answer
We do not have an official recommended calibration interval. However, we would suggest checking the calibration at least once or twice a year depending on the applciation and how often the unit is used.
Question
Is there a manometer that is compatible with chlorine gas and sodium hydroxide (bleach)?
Answer
Unfortunately, we do not have any manometers available that can handle chlorine gas or sodium hydroxide (bleach).
Question
I have four Series 475 Mark III Handheld Digital Manometers that we have had for one year. I would like to have them calibrated, but I do not know where to send them. Do you offer a calibration service for the products you sell?
Answer
Yes, we provide NIST calibration for the 475 series both at the time of purchase and afterward. Please use our calibration services online using our product configurator or call one of our customer service representatives at 1-800-872-9141 and provide them with your model number(s).
Question
Does the 475 model work with propane?
Answer
The 475 is compatible with combustible gases and is FM approved.
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Model Description Availability* Price
A-201 Rubber latex tubing has less tendency to kink in storage and occupies less space, thus is best for portable work. 3/16" ID, 9' length. 1-3 days*
$9.30
A-303 Portable static pressure tip, for 3/16" ID rubber or plastic tubing with 4" insertion. 1-3 days*
$12.50
A-375 Compression fitting connections, 1/8" tube to 1/8" NPT male 1-2 Weeks*
$4.90
A-397 Rugged step drill, quickly provides true round holes in thin materials, no center punch needed to start, automatically de-burrs drilled hole, high speed steel, drills 3/16" through 1/2" holes in 1/16" increments. 1-3 days*
$68.00
A-402A Carrying case for most manometers; tough, gray nylon pouch, double zippered with belt loop 1-3 days*
$51.50
A-463 Plastic carrying case with foam liner for 475-1-AV air velocity kit - 13-1/2" x 10" x 2-3/8". 1-2 Weeks*
$90.50
A-472T 475-T AV telescoping pitot tube air velocity kit less manometer Less Than 1 Week*
$493.00
A-47X-BOOT Rubber boot for manometers (manometer not included) 1-3 days*
$16.50
A-532 Air velocity calculator slide chart. 1-3 days*
$12.75
166-6-CF Pocket size Pitot tube, 1/8" dia., 6" insertion length, 3" tip, with 1/8" male NPT compression fitting. 1-3 days*
$150.00
166T Telescoping pitot tube 1-3 days*
$309.00