Air volume hood

Air volume hood

Model:testo 420
Brand:fengtu
The air volume hood is suitable for fast and accurate measurement of large air inlet/return outlet to meet the requirements of the regulatory system to ensure indoor air quality....

1.Air volume hood product introduction

The air volume hood is also called a digital air volume meter or a clean room environment air volume meter. The air volume hood is suitable for rapid and accurate measurement of large air inlets/returns. It meets the requirements of the regulatory system to ensure indoor air quality and is suitable for air conditioning and heating in hospitals, office buildings or commercial buildings. System measurements provide reliable support.

Built-in air flow rectifier allows accurate measurement even at the vortex outlet

Vortex outlet vents require frequent air volume measurements. Due to the influence of turbulence at the air outlet, wind speed is often not accurately measured.

The testo 420 air volume hood can effectively reduce measurement errors. The built-in air flow rectifier can effectively reduce eddy currents and uniform air flow, thereby achieving accurate measurement of air volume between 80 and 3,500 m3/h.

Lightweight air volume hood, minimalist setup

The air volume hood is equipped with an ergonomically designed handle and an adjustable display screen, and the total weight of the fuselage is only 2.9kg. This means that air volume measurement tasks can be easily and accurately performed even in large conference rooms and at overhead heights. Protruding measurement buttons located at the base of the air volume hood ensure that every reading during the measurement process is recorded.

Standard hood size is 610 x 610mm. Additional hood options are available for additional ceiling outlet measurements. The optional tripod is a great help for inlet and return measurements at height. The tripod can be extended up to 4m.

Fixed tie rods make the air volume hood quick and easy to assemble. The factory-standard transport trolley case ensures safe transportation.

Create measurement reports online and send to your email using the app

Download the free app to take advantage of even more benefits. Through the application and Bluetooth function, smartphones and tablets can be used as second displays and controlled remotely. Especially useful when using a tripod to measure high on ceilings.

When measuring the air conditioning and heating ventilation system, you can start/end the measurement program through the App, save the measurement results in .txt format, and create a measurement report online. Measurement results, such as total air volume and air exchange rate, are distributed according to the customer's customized template, and measurement results and reports are sent via email. Help you save time and improve work efficiency.


2. Product features of air volume hood

The air volume hood suitable for measuring air conditioning and HVAC systems is equipped with a display to display the measurement results. The adjustable display allows customers to read measurements from different angles.

It can complete wind speed, air volume, absolute pressure, temperature and relative humidity measurement tasks. Auto-zero function ensures accurate measurement under low pressure.

Backlit display, all measurement values can be read on one screen. Through the application, the functions of saving measurement values and creating measurement reports online are realized, and measurement values can be analyzed and managed. Data management can also be performed on a computer without additional operating software.

The air volume hood integrates different measuring instruments and is not limited to ceiling air outlet air volume measurement. Removing the wind hood can also be used to measure pressure, wind speed and air volume in the pipeline. Save costs, no need to purchase other instruments.

When measuring pipelines, just connect the optional pitot tube and connecting hose. The time average/multi-point average calculation function and the input pipeline geometry can be used together to help complete pipeline measurements with twice the result with half the effort.


3. Product composition of air volume hood

The testo 420 air volume hood comes standard with a main unit, standard air hood size 610x610mm, 5 fixed trolleys, USB data cable, battery and transport trolley case. Air volume hoods of other sizes are optional.


4. Technical parameters of air volume hood

NTC 
Measuring range-20 ~ +70 °C
measurement accuracy±0.5 °C (0 ~ +70 °C)
±0.8 °C (-20 ~ +0 °C)
resolution0.1°C
Response time t₉₀45 seconds (t90)
capacitive humidity sensor 
Humidity measuring range0~100%RH
measurement accuracy±1.8 %RH + 3 % of measured value at +25 °C
(5~80%RH)
resolution0.1%RH
Differential pressure 
Measuring range-120 ~ +120 Pa
measurement accuracy±2 % of measured value + 0.5 Pa at +22 °C, 1013 hPa
resolution0.001Pa
Response time t₉₀1 s (t90)
absolute pressure 
Measuring range700 ~ 1100 hPa
measurement accuracy±3 hPa
resolution0.1 hPa
Response time t₉₀1 s
Air volume 
Measuring range40 ~ 4000 m³/h
measurement accuracy±3 % of measured value + 12 m³/h at +22 °C
1013 hPa (85 ~ 3500 m³/h)
resolution1m³/h
Response time t₉₀1 s (t90)
Technical indicators 
weight2900g
size610 x 610 mm (standard air volume hood)
operating temperature-5 ~ +50 °C
System Requirementsrequires iOS 12.0 or newer; requires Android 6.0 or newer; requires mobile end device with Bluetooth 4.0
EU-/EG-RegulationsEU Directive 2014/30/EU
Battery TypeAlkaline manganese battery
Battery life40 hours
Display size3.5"
Display characteristicslattice
Display backlightWith backlight display
data transmissionUSB interface; Bluetooth® 4.0 wireless technology
data transmissionBluetooth®
Radio range10 m
Storage capacity2 GB (memory)
Storage temperature-20 ~ +60 °C
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