


Dwyer Instruments 475-0-FM | Digital Pressure Meter | 0.36Psi | Model 475-0-Fm
For field calibration, monitoring, or troubleshooting HVAC systems, clean rooms, or a variety of other low pressure pneumatic systems, the DWYER SERIES 475 MARK III HANDHELD DIGITAL MANOMETER is perfect. This useful tool measures air and natural gas pressures in positive, negative, or differential modes in ranges from 1 in w.c. (0.249 kPa) to 150 psid (10.34 bar). For plant engineers, industrial hygienists, and HVAC technicians, it is an essential test tool due to its straightforward operation and easily readable digital display. The Series 475 Mark III can also be used as an air velocity gage when paired with a Dwyer Pitot tube. View the complete kit for 475-1-AV.

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- Specifications
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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) |
Approvals | CE, FM |
Connection | Process: 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 |
Material | Wetted: Consult factory |
Power | 9 V alkaline battery, installed non-functional, user replaceable |
PRESSURE | Hysteresis: +/-0.1% of Full Scale |
Temperature | Compensated Temperature Limits: 32 to 104°F (0 to 40°C) |
Temperature | Limits: 0 to 140°F (-17.8 to 60°C) |
Temperature | Storage Temperature Limits: -4 to 176°F (-20 to 80°C) |
Type | Digital Manometer |
Weight | 10.8 oz. (306 g) |
- Checking the pressure of natural gas in boilers and other combustion machinery.
- Using an AV calculator and a Dwyer Pitot tube, air velocity monitoring.
- Calibration of other instruments in the field.
- Keeping an eye on or debugging HVAC systems.
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