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).

Xi'an Kacise Optronics Co.,Ltd. is a professional manufacturer of  measuring instruments , located in China xi’an City. Since 2008, Xi'an Kacise focused on the development and production of pressure, level and flow measuring instruments .

We have been specializing in manufacturing pressure, level and flow measuring instruments and related products for 10 years. Based on experienced technical and management personnel, through efforts of our entire staff, we have become a professional measuring instrument manufacturer and solution provider. And we are continuously trying to improve product quality.

Xi'an Kacise is qualified with ISO 9001-2008, GJB 9001B-2009, CE, intrinsic safety explosion-proof and isolated safety explosion-proof certificates, etc. which ensure that our products comply with international standards.

Kacise sensors have already been exported to America, Spain, Australia, Chile and 20 other countries and regions, and received many favorable feedbacks. Our overseas distributers are also increasing. We regard “reasonable prices, efficient production time and good after-sales service” as our tenet, and hope to cooperate with more customers for mutual development.

Our goal is simple: to sell the best products at the best prices, and provides industry-leading customer service. We personally get to know each of our customers, and we know how to discover the most valuable part of our business , to help others achieve their goals.