Precision Environments

Aerosol, Filtration & Airflow Test Solutions

Challenge-aerosol engineering, filter development and production testing, quantitative airflow verification and environmental measurement — for laboratories, filter manufacturers, building services and industrial facilities.

Topas AFC 131 laboratory filter media test system used to characterise cleanable filter media with automated dust loading and pressure-drop monitoring
Filter testing
Topas SAG 410 Series solid aerosol and dust disperser for reproducible dust and powder aerosol generation
Aerosol
Kanomax TABmaster capture hood with detachable micromanometer for direct volume-flow measurement at a diffuser
Airflow
Measurement scope

Measurement Scope and Test-Object Definition

Define whether the requirement concerns aerosol preparation, filter performance, quantitative airflow or an occupied environment. Each route uses a different method, reference framework and equipment architecture.

  • A controlled aerosolYou need to produce, condition, dry, neutralise or dilute a reproducible test aerosol for something else to measure.
  • A filter's performanceYou have a filter specimen, element or medium and need efficiency, penetration, pressure drop or loading behaviour.
  • Air movement, quantifiedYou need velocity, volume flow, differential pressure or duct leakage as numbers against an acceptance criterion.
  • The environment people occupyYou need carbon dioxide, temperature, humidity, particles or workplace dust in an occupied space.
Test-method distinction

Installed-System Verification vs Filter Product Testing

These two are routinely confused, and specifying one when you need the other produces equipment that cannot answer your question. They test different objects, in different places, against different standards.

Installed-filter integrity

Installed Filter-System Verification

The object is the complete installed system — media, frame, gasket or gel seal, mounting and housing interfaces — in a working cleanroom, cabinet or theatre. The question is whether it leaks locally.

01Installed cleanroom
02Challenge aerosol
03Downstream scan
04Leak localisation

HEPA / ULPA Filter Integrity →

Filter development / production

Laboratory and Production Filter Testing

The object is a specimen, element or medium on a laboratory or production test system. The question is how well it performs — efficiency, penetration, pressure drop, loading behaviour.

01Filter specimen
02Controlled challenge
03Upstream / downstream
04Efficiency / penetration / Δp

Filter Development & Production Testing →

Standards Applicability

EN 1822 and ISO 29463 address leakage and efficiency of filter elements and media as manufactured. ISO 14644-3 addresses performance testing of the installed cleanroom or clean zone. Their scopes are related but not identical, and they must not be used interchangeably.

Standards applicability

Standards by Measurement and Test Object

In this area the test object decides the standard. A rig built for one object does not automatically satisfy the method written for another, so each reference is explained on the page where it applies.

VDI 3491 seriesAerosol generation, preparation and conditioning engineering context.Aerosol Generation & Conditioning →
EN ISO 29463 partsHigh-efficiency media, element leakage and MPPS efficiency.Filter Development & Production Testing →
ISO 16890 seriesGeneral-ventilation filters, where that is the test object.Filter Development & Production Testing →
ISO 14644-3Installed filter systems in a cleanroom — a different object entirely.HEPA / ULPA Filter Integrity →
Project specificationAirflow acceptance criteria normally come from the project, not a single standard.HVAC Airflow & Performance →

Configure an aerosol, filtration or airflow test system

Share the test object, the aerosol or challenge required, the flow range, the parameters to be measured and the applicable standard or research protocol.