Series 475 Mark III Handheld Digital Manometer

Mark III Handheld Digital Manometer Ranges from 1" w.c. to 150 psid, ±0.5% Accuracy

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

The SERIES 475 Mark III 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
More Information
Model Chart
EXAMPLE 475 000 AV Series 475-000-AV Mark III Handheld Digital Manometer, range 0-1.000" w.c., with air velocity kit.
SERIES 475     Mark III Handheld Digital Manometer

RANGE
(If ordering -AV
Option, these ranges
will include a Model
166-6-CF Pitot Tube
in the Air Velocity Kit.)

  000
00
0
1
2
3
4
5
6
7
8
  1.000" w.c. / .2491 kPa
4.000" w.c. / 0.996 kPa
10.00" w.c. / 2.491 kPa
20.00" w.c. / 4.982 kPa
40.00" w.c. / 9.96 kPa
200.0" w.c. / 49.82 kPa
10.00 psi / .6895 bar
20.00 psi / 1.379 bar
30.00 psi / 2.069 bar
100.0 psi / 6.895 bar (range not available with -AV Option)
150.0 psi / 10.34 bar (range not available with -AV Option)

RANGE
(You must order -AV
Option with these ranges
and will
include a Model
166T Telescoping Pitot
Tube in the Air Velocity Kit.)

  000T
00T
0T
1T
2T
3T
4T
5T
6T
  1.000" w.c. / .2491 kPa with Telescoping Pitot Tube
4.000" w.c. / 0.996 kPa with Telescoping Pitot Tube
10.00" w.c. / 2.491 kPa with Telescoping Pitot Tube
20.00" w.c. / 4.982 kPa with Telescoping Pitot Tube
40.00" w.c. / 9.96 kPa with Telescoping Pitot Tube
200.0" w.c. / 49.82 kPa with Telescoping Pitot Tube
10.00 psi / .6895 bar with Telescoping Pitot Tube
20.00 psi / 1.379 bar with Telescoping Pitot Tube
30.00 psi / 2.069 bar with Telescoping Pitot Tube
OPTIONS     AV
NIST
Air Velocity Kit
NIST Certificate of Calibration
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.
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.
  • 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