Dwyer 477AV Digital Manometer with ±0.5% Accuracy
| Attribute |
Value |
| Accuracy |
±0.5% FS, 60 To 78°F (15.6 To 25.6°C) |
| Material |
Consult Factory |
| Pressure Range |
See Chart |
| Size |
80MM |
| Product Name |
Dwyer 477AV-000 Digital Manometer |
| Gauge |
Differential Pressure Gauges |
Series 477AV Handheld Digital Manometer
The Series 477AV Handheld Digital Manometer is a versatile measuring instrument designed to accurately measure pressure, air velocity, and flow in various applications. With ±0.5% full-scale accuracy (at 60-78°F/15.6-25.6°C), it eliminates manual calculation errors by integrating built-in velocity and flow algorithms. The device features field-calibratable zero/span adjustments and a damping function to stabilize fluctuating readings, making it ideal for HVAC diagnostics, ductwork testing, and industrial airflow management.
Product Features
Multi-Parameter Measurement
- Measures pressure (in w.c., psi, kPa, etc.), air velocity (fpm, m/s), and flow (cfm, m³/h)
- Auto-calculates velocity/flow from pressure inputs, reducing field errors
Accuracy & Stability
- ±0.5% FS accuracy in optimal temperatures (60-78°F), ±1.5% in extended ranges (32-104°F)
- ±0.1% FS hysteresis for consistent readings across pressure cycles
Field Calibration
- Adjustable zero/span values for on-site calibration without external tools
- Damping feature to smooth out transient pressure fluctuations
Display & Units
- 0.42" 4-digit LCD with selectable units for pressure, velocity, and flow
- Supports 12+ pressure units (e.g., in Hg, mbar), 6 velocity units, and 3 flow units
Portability & Power
- Lightweight design (10.2 oz/289 g) with 9V alkaline battery (user-replaceable)
- Low-power mode for extended field use
Technical Specifications
| Parameter |
Details |
| Model Range Examples |
477AV-0: 0-10.00" w.c. / 477AV-4: 0-10.00 psi / 477AV-7: 0-100.00 psi |
| Accuracy |
±0.5% FS (15.6-25.6°C), ±1.5% FS (0-40°C) |
| Pressure Limits |
Varies by model (e.g., 477AV-0: ~2 psi burst pressure) |
| Temperature Range |
Operating: 0-140°F (-17.8-60°C); Storage: -4-176°F (-20-80°C) |
| Display |
0.42" 4-digit LCD, auto-brightness |
| Process Connections |
1/8" or 3/16" ID tubing (barbed fittings); 1/8" compression fittings (477AV-7/8) |
| Power Supply |
9V alkaline battery (150+ hours typical life) |
| Approvals |
CE certified |