Series 477AV Handheld Digital Manometer
Product Introduction
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 Specs at a Glance
| 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 |
