Accurate Air Velocity Measurement Solutions with Series 475-AV & 477-AV Kits

Posted on: 08/05/2025

In the HVAC industry, processing plants, and cleanroom applications, accurately measuring air velocity is crucial to ensuring system efficiency and safety.

The Series 475-AV and 477-AV Kits from Dwyer Instruments provide the ideal solution, allowing engineers and technicians to carry out their tasks quickly, precisely, and with ease.

1. Overview of Series 475-AV & 477-AV Kits

The Series 475-AV and 477-AV Kits are specially designed for air velocity measurement using the differential pressure method. Each kit includes:

Digital manometer
Pitot tube
Connecting tubes and accessories
Protective carrying case for safe transport and storage

2. Key Advantages of Series 475-AV & 477-AV Kits

High Accuracy

Both models are calibrated to deliver data with extremely low error margins, ensuring superior accuracy compared to conventional measuring devices.

Clear Digital Display

Equipped with an LCD digital display, the devices allow users to easily read results, which is especially useful in low-light environments or limited visibility areas.

Easy Operation and Use

With an intuitive, compact design, the devices can be set up and deliver results in just a few simple steps.

All-in-One Kit

Users do not need to purchase additional accessories — everything necessary is included in the specialized kit.

3. Practical Applications

HVAC Systems: Measuring airflow and velocity at diffusers and ductwork
Industrial Plants: Inspecting ventilation systems, fume hoods, and air pipelines
Cleanrooms & Laboratories: Ensuring precise environmental control
Maintenance & Routine Inspections: Portable and convenient for on-site testing

4. Differences Between Series 475-AV and 477-AV

5. DLK – Authorized Distributor of Dwyer Measuring Instruments in Vietnam

DLK is one of the leading distributors in Vietnam, specializing in providing measuring, monitoring, and control instruments for the HVAC and industrial sectors. With many years of experience and in-depth technical expertise, DLK is committed to delivering:

100% genuine products from Dwyer Instruments (USA)
Professional technical consultation to help select the right equipment for your needs
Competitive pricing and various promotional policies
Official warranty and dedicated after-sales service

In addition to air velocity measuring devices, DLK also supplies a wide range of pressure gauges, flow meters, temperature and humidity sensors from globally renowned brands.