The D477AV-0 Dwyer handheld manometer provides pressure, flow, and velocity measurements along with a number of other convenient features.

The D477AV-0 (0-10 inH20) uses a highly accurate differential pressure sensor to offer ± 0.5% full-scale accuracy. The accuracy provided is critical to maintenance personnel and technicians who require a highly accurate standard to check their instrumentation or equipment, to ensure proper performance.