The Series 477B Handheld Digital Manometers are versatile, hand-held, battery operated manometers available in several basic ranges from 0 in W.C. - 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.
• Precise 0.1% FS accuracy provides four times better accuracy than most standard manometer/gages
• Aluminum housing protects instrument against damage
• 40 readings in internal memory reduces time to record data
| Service | Air and compatible gases |
| Wetted Parts | Consult factory |
| Accuracy | ± 0.10% of full scale from 60°F - 78°F (15.6°C - 25.6°C); ± 1% of 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 chart on catalog page |
| Temperature Limits | 0°F - 140°F (-17.8°C - 60°C) |
| Storage Temperature Limits | -4°F - 176°F (-20°C - 80°C) |
| Display | 4-digit LCD (0.425 in H x 0.234 in W digits) |
| Resolution | See chart on catalog page |
| Power Requirements | 9 V alkaline battery. Battery included but not connected |
| Connections | Two barbed connections for use with 1/8 in (3.18 mm) or 3/16 in (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 in (3.18 mm) I.D. x 1/4 in (6.35 mm) O.D. tubing for 477B-6 and 477B-7 only |
| Weight | 10.2 oz. (289 g) |
| Agency Approvals | CE |
• Lab calibration of other pressure instruments
• Air velocity/air flow measurements in commercial buildings
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