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Last Updates: 05/12/2020

Dwyer Series 475 Intrinsically Safe Handheld Digital Manometer

The Dwyer 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

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

Manual: Instruction Manual
Catalog Pages: Series 475 Catalog Page

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