475 Intrinsically Safe Handheld Digital Manometer
Measures positive, negative, or differential pressures of air and natural gases with a large, easy-to-read LCD
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.
• 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
| Service | Air and compatible combustible gases |
| Wetted Materials | Consult factory |
| Accuracy | ± 0.5% Full Scale, 60°F - 78°F (15.6°C - 25.6°C); ± 1.5% Full Scale from 32°F - 60°F and 78°F - 104°F (0°C - 15.6°C and 25.6°C - 40°C) |
| Pressure Hysteresis | ± 0.1% of Full Scale |
| Pressure Limits | See catalog page |
| Temperature Limits | 0°F - 140°F (-17.8°C - 60°C) |
| Compensated Temperature Limits | 32°F - 104°F (0°C - 40°C) |
| Storage Temperature Limits | -4°F - 176°F (-20°C - 80°C) |
| Display | 0.42 in (10.6 mm) 4-digit LCD |
| Resolution | See Data Sheet |
| Power Requirements | 9 V alkaline battery, installed non-functional, user replaceable |
| Weight | 10.8 oz. (306 g) |
| Process Connections | Two (2) barbed connections for use with 1/8 in (3.18 mm) or 3/16 in (4.76 mm) I.D. tubing. Two (2) compression fittings for use with 1/8 in (3.18 mm) I.D. x 1/4 in (6.35 mm) O.D. tubing for 475-7 & 475-8 only |
| Agency Approvals | CE, FM |
• 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
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