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

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Shipping Information

All shipping times are dependent on product availability at time of shipment.

Although we make every effort to ensure a continuous supply of our products, occasional circumstances may force us to temporarily run out of a product, or have shipping delays. Should this occur, customers will be notified soon after placement of any orders for such products and, if applicable, items will be put on backorder. For orders requiring expedited shipment, our customer service team can be contacted to confirm product availability

COVID-19 Update: Due to high customer demand, lead time on some products may be up to two weeks. While this is a developing health situation, we are working continuously to take the necessary measures to ensure that the products you need are available with minimal interruption.

Build Your Custom Part. Use our Product Configurator

Model Description Usually Ships* Price Order
475-000-FM
Ships: Next Day
Price: $283.00
Handheld digital manometer, range 0-1.000" w.c. (.2491 kPa), max. pressure 5 psig. Next Day* $283.00 Order
475-00-FM
Ships: Next Day
Price: $212.00
Handheld digital manometer, range 0-4.000" w.c. (0.996 kPa), max. pressure 5 psig. Next Day* $212.00 Order
475-0-FM
Ships: Next Day
Price: $212.00
Handheld digital manometer, range 0-10.00" w.c. (2.491 kPa), max. pressure 5 psig. Next Day* $212.00 Order
475-1-FM
Ships: Next Day
Price: $212.00
Handheld digital manometer, range 0-20.00" w.c. (4.982 kPa), max. pressure 10 psig. Next Day* $212.00 Order
475-2-FM
Ships: Next Day
Price: $152.00
Handheld digital manometer, range 0-40.00" w.c. (9.96 kPa), max. pressure 10 psig. Next Day* $152.00 Order
475-3-FM
Ships: Next Day
Price: $152.00
Handheld digital manometer, range 0-200.0" w.c. (49.82 kPa), max. pressure 30 psig. Next Day* $152.00 Order
475-4-FM
Ships: Next Day
Price: $152.00
Handheld digital manometer, range 0-10.00 psi (.6895 bar), max. pressure 30 psig. Next Day* $152.00 Order
475-5-FM
Ships: Next Day
Price: $152.00
Handheld digital manometer, range 0-20.00 psi (1.379 bar), max. pressure 60 psig. Next Day* $152.00 Order
475-6-FM
Ships: Next Day
Price: $152.00
Handheld digital manometer, range 0-30.00 psi (2.069 bar), max. pressure 60 psig. Next Day* $152.00 Order
475-7-FM
Ships: Next Day
Price: $152.00
Handheld digital manometer, range 0-100.0 psi (6.895 bar), max. pressure 150 psig. Next Day* $152.00 Order
475-8-FM
Ships: Next Day
Price: $152.00
Handheld digital manometer, range 0-150.0 psi (10.34 bar), max. pressure 200 psig. Next Day* $152.00 Order

Can't find what you need? Build Your Custom Part. Use our Product Configurator

Specifications

Service:
Air and compatible combustible gases.
Wetted Materials:
Consult factory.
Accuracy:
±0.5% Full Scale, 60 to 78°F (15.6 to 25.6°C); ±1.5% Full Scale 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 Full Scale.
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.
Weight:
10.8 oz. (306 g).
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.
Agency Approvals:
CE, FM.

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

  • -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.

Accessories

Model Number Description Usually Ships* Price Order
Kit, less manometer A-472T Kit, less manometer Less Than 1 Week $346.00 Order
Rubber latex tubing has less tendency to kink in storage and occupies less space, thus is best for portable work. 3/16 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. Next Day $7.80 Order
Portable static pressure tip, for 3/16 A-303 Portable static pressure tip, for 3/16" ID rubber or plastic tubing with 4" insertion. Next Day $10.25 Order
A-375 Compression fitting connections, 1/8" tube to 1/8" NPT male. 1-2 Weeks $4.00 Order
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 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. 1-2 Weeks $57.00 Order
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 $76.50 Order
Air velocity calculator slide chart. A-532 Air velocity calculator slide chart. Next Day $10.50 Order
Telescoping pitot tube 166T Telescoping pitot tube Next Day $208.00 Order
Pocket size Pitot tube, 1/8 166-6-CF Pocket size Pitot tube, 1/8" dia., 6" insertion length, 3" tip, with 1/8" male NPT compression fitting. Next Day $100.75 Order
Carrying case for most manometers; tough, gray nylon pouch, double zippered with belt loop A-402A Carrying case for most manometers; tough, gray nylon pouch, double zippered with belt loop Next Day $43.75 Order
Rubber boot for manometers (manometer not included). A-47X-BOOT Rubber boot for manometers (manometer not included). Next Day $13.50 Order

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

SlideShare

Approvals

Drawings

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 afterwards. Please contact 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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