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.
- 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.