477B Handheld Digital Manometer for HVAC and Industrial Use

Series 477B Handheld Digital Manometer

Product Introduction

The Series 477B Handheld Digital Manometer is a precision instrument designed for accurate measurement of positive, negative, and differential air pressures. With an impressive ±0.1% full-scale accuracy (at 60–78°F/15.6–25.6°C), it outperforms standard manometers in reliability. Available in ranges from 0–20 in w.c. to 0–100 psi, the device features the ability to store 40 readings, the option for seven pressure units, and both visual/audible overpressure alarms. Its compact, battery-powered design makes it ideal for field use in HVAC, industrial diagnostics, and compressed air systems.

Product Features

Exceptional Accuracy:

±0.1% FS accuracy in optimal temperatures (15.6–25.6°C), ±1% in extended ranges (0–40°C).

±0.1% FS hysteresis for consistent readings across pressure cycles.

Multi-Functionality:

Measures positive, negative, or differential pressure in 7 selectable units (in w.c., psi, kPa, mbar, etc.).

Stores 40 readings for later recall, with hold function for freezing measurements.

User-Centric Design:

Backlit 4-digit LCD (0.425"H digits) for low-light visibility.

Visual/audible overpressure alarms to prevent damage in extreme conditions.

Portability & Power:

Lightweight (10.2 oz/289 g) with 9V alkaline battery (included, user-replaceable).

Long battery life for extended field operations.

Durable Construction:

Operating temperature: 0–140°F (-17.8–60°C); storage: -4–176°F (-20–80°C).

Barbed/compression fittings for 1/8"–3/16" ID tubing (model-dependent).