The Dwyer Series 477B Handheld Digital Manometers are versatile, hand-held, battery operated manometers available in several basic ranges from 0-20 in w.c. up to 100 psi. All models measure either positive, negative or differential pressures with ±0.10% of full scale accuracy. You can select from up to seven common English and metric pressure units so conversions are not necessary. A memory function allows storage of up to 40 readings for later recall and a backlight provides auxiliary lighting for hard-to-see locations. Also standard are a hold feature plus both visual and audible overpressure alarms.
- Lab calibration of other pressure instruments
- Air velocity/air flow measurements in commercial buildings
Service : Air and compatible gases.
Wetted Parts : Consult factory.
Accuracy : ±0.10% of full scale from 60 to 78F° (15.6 to 25.6°C); ±1% of full scale from 32 to 60 and 78 to 104°F (0 to 15 .6 and 25.6 to 40°C).
Pressure Hysteresis : ±0.1% of full scale.
Pressure Limits : See chart on catalog page.
Temperature Limits : 0 to 140°F (-17.8 to 60°C).
Storage Temperature Limits : -4 to 176°F (-20 to 80°C).
Display : 4-digit LCD (.425″ H x .234″ W digits).
Resolution : See chart on catalog page.
Power Requirements : 9 volt alkaline battery. Battery included but not connected.
Connections : Two barbed connections for use with 1/8″ (3.18 mm) or 3/16″ (4.76 mm) I.D. tubing for 477B-1, 477B-2, 477B-3, 477B-4 and 477B-5 only. Two compression fittings for use with 1/8″ (3.18 mm) I.D. x 1/4″ (6.35 mm) O.D. tubing for 477B-6 and 477B-7 only.
Weight : 10.2 oz. (289 g).
Agency Approvals : CE.