Dwyer 477B Handheld Digital Manometer 0-20" w.c. Range with ±0.10% Accuracy for Air Pressure Measurement
The Series 477B Handheld Digital Manometer is a versatile, battery-operated instrument designed for precise pressure measurement in various industrial and commercial applications. Available in multiple ranges from 0-20 in w.c. up to 100 psi, this portable device measures positive, negative, or differential pressures with exceptional ±0.10% full-scale accuracy.
| Parameter | Specification |
|---|---|
| Brand | Dwyer |
| Model Series | 477B |
| Range (Base Model) | 0-20.00" w.c. (0 to 4.982 kPa) |
| Service Medium | Air and compatible gases |
| Accuracy | ±0.10% of full scale (60-78°F); ±1% of full scale (32-60°F & 78-104°F) |
| Pressure Hysteresis | ±0.1% of full scale |
| Temperature Limits | 0 to 140°F (-17.8 to 60°C) |
| Display | 4-digit LCD (.425" H x .234" W digits) |
| Weight | 10.2 oz (289 g) |
| Certifications | CE Approved |
- ±0.10% full-scale accuracy - four times better than standard manometers
- Seven selectable pressure units eliminates conversion needs
- 40-reading internal memory for data recording
- Backlit display for low-light conditions
- Hold function and overpressure alarms
- Durable aluminum housing for industrial protection
- Battery-operated for complete portability
- Laboratory calibration of pressure instruments
- Air velocity and airflow measurements in commercial buildings
- HVAC system testing and maintenance
- Industrial process pressure monitoring
Models 477B-1 through 477B-5: Two barbed connections for 1/8" (3.18 mm) or 3/16" (4.76 mm) I.D. tubing
Models 477B-6 and 477B-7: Two compression fittings for 1/8" (3.18 mm) I.D. x 1/4" (6.35 mm) O.D. tubing
| Model | Description |
|---|---|
| 477B-1 | Handheld digital manometer, 0 to 20" w.c. (0 to 4.982 kPa) |
| 477B-2 | Handheld digital manometer, 0 to 40" w.c. (0 to 9.96 kPa) |
| 477B-3 | Handheld digital manometer, 0 to 200" w.c. (0 to 49.82 kPa) |
| 477B-4 | Handheld digital manometer, 0 to 10 psi (0 to 68.95 kPa) |
| 477B-5 | Handheld digital manometer, 0 to 30 psi (0 to 206.9 kPa) |
| 477B-6 | Handheld digital manometer, 0 to 50 psi (0 to 344.7 kPa) |
| 477B-7 | Handheld digital manometer, 0 to 100 psi (0 to 689.5 kPa) |
Carrying Case: Tough gray nylon pouch with double zipper closure and belt loop. Dimensions: 7-1/2"H x 3"W x 2-1/4"D (191 x 76 x 57 mm).
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