Cleanroom Testing and Validation Instruments

Airflow Capture Hood

A lightweight electronic capture hood for direct supply and return air-volume measurement at ceiling diffusers, grilles and cleanroom terminal outlets.

Direct supply and return airflow at terminal outlets.
Flow averaging and back-pressure compensation.
Lightweight collapsible design for one-person surveys.

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Product Introduction

This airflow capture hood channels the full outlet flow through a multi-point sensing manifold in its molded base and displays volumetric airflow on a detachable micromanometer. A tensioned fabric hood and interchangeable frame sizes fit common diffusers without restricting the opening. Automatic supply or return recognition, flow conditioning and back-pressure compensation help technicians obtain stable readings from conventional and swirl outlets.

Key Features

Direct volumetric airflow reading avoids multi-point velocity calculations.

Multi-port sensing manifold averages non-uniform diffuser flow.

Automatic supply and return recognition simplifies field setup.

Back-pressure compensation reduces hood-induced measurement bias.

Detachable micromanometer supports pressure and probe measurements.

Lightweight frame and ergonomic base enable one-person balancing.

Customer Product Concerns

Terminal airflow measurement must capture the entire diffuser, average non-uniform flow and limit the measurement resistance introduced by the hood itself.

Swirling or uneven outlet flow can make a single-point reading unrepresentative.The internal flow conditioner and distributed sensing manifold average the full captured stream.

The hood itself can add resistance and alter the true outlet flow.Back-pressure compensation corrects the displayed volume for the measured hood influence.

Large ceiling outlets are difficult to measure safely with one technician.A lightweight collapsible frame and optional support stand reduce overhead handling and ladder use.

Different diffuser sizes can leave gaps at the hood perimeter.Interchangeable frame and fabric-hood sizes provide full coverage of common terminal geometries.

Typical Applications

Cleanroom diffuser airflow verificationHVAC testing and balancingSupply and return grille measurementTerminal HEPA module commissioningVentilation system performance surveys

Technical Parameters

Common standard-hood construction values are listed below; frame size, sensor package and support accessories can be selected for the outlet geometry.

Core Material	Low-permeability fabric hood, collapsible aluminum frame, molded engineering-polymer base and multi-port sensing manifold
Panel Thickness	Typically 2.0-3.5 mm for molded base wall sections
Effective Width	Typically 610 mm for the standard square diffuser frame
Maximum Length	Approximately 1000-1300 mm when the standard hood is fully erected
Steel Facing Thickness	Typically 0.8-1.2 mm for stainless sensing tubes and protective fittings
Core Density	Approximately 2700 kg/m³ for the aluminum support frame
Thermal Conductivity	Approximately 160-205 W/(m·K) for the aluminum frame members
Surface Finish	White low-shed fabric with black molded base, clear display lens and anodized aluminum frame
Joint Type	Snap-fit hood frame, sealed manifold connections and barbed differential-pressure ports
Customization	Available based on the intended application and operating environment.

Available Options

Multiple square and rectangular hood sizesSwirl-flow conditionerDetachable micromanometerTemperature and humidity probeTelescopic floor standWireless logging and report export

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