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 equipmentAir velocity monitoring, when used with a Dwyer® Pitot tube and AV calculatorField calibration of other instrumentsMonitoring or troubleshooting HVAC system

 

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.

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.