Cleanroom Testing and Validation Instruments

Cold Aerosol Generator

A portable Laskin-nozzle generator that atomizes compatible test liquid without heat to provide a stable polydisperse challenge aerosol for in-situ filter integrity testing.

Repeatable cold aerosol without a heating cycle.
Selectable Laskin nozzles for adaptable challenge output.
Portable stainless construction for field validation.

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Product Introduction

This cold aerosol generator uses regulated compressed air and immersed Laskin nozzles to entrain test liquid and create a repeatable submicron aerosol without a heating cycle. Selectable nozzle operation lets technicians match aerosol output to smaller cabinets or larger air-handling systems. A sealed liquid reservoir, pressure indication and serviceable stainless outlet path make the instrument practical for cleanroom qualification and routine HEPA or ULPA leak testing.

Key Features

Cold atomization avoids thermal decomposition of compatible aerosol liquids.

Selectable Laskin nozzles provide stepped output for different system airflows.

Regulated pressure indication helps reproduce operating conditions between tests.

Internal baffles reduce the carryover of oversized liquid droplets.

Sealed reservoir and drain connection simplify filling, recovery and transport.

Portable corrosion-resistant enclosure supports field certification work.

Customer Product Concerns

Reliable cold aerosol testing depends on controlled air pressure, appropriate droplet separation and enough output flexibility for different filter-system airflows.

A fixed aerosol output may be excessive for a small cabinet and insufficient for a large plenum.Independently selectable nozzles provide practical output steps that can be matched to system airflow.

Changing compressed-air pressure can make challenge concentration difficult to reproduce.A regulator and clearly visible pressure gauge establish a repeatable nozzle operating point.

Large liquid droplets can contaminate ductwork or destabilize the photometer reading.Immersed nozzles and an internal impingement baffle retain coarse droplets in the reservoir.

Residual test liquid may leak during movement between validation locations.A sealed fill cap, level guidance and drainable reservoir support controlled filling and transport.

Typical Applications

In-situ HEPA and ULPA filter leak testingBiological safety cabinet certificationCleanroom ceiling module qualificationNegative-pressure filtration unit testingUpstream challenge generation for aerosol photometers

Technical Parameters

The following values describe common portable Laskin-nozzle construction; nozzle quantity, dimensions and air requirements can be configured for the intended test range.

Core Material	Stainless-steel liquid reservoir with immersed Laskin nozzles, internal baffle and regulated compressed-air manifold
Panel Thickness	Typically 1.0-1.5 mm for the protective stainless enclosure
Effective Width	Approximately 220-380 mm according to nozzle count and compressor configuration
Maximum Length	Approximately 300-520 mm including outlet, controls and carrying handle
Steel Facing Thickness	Typically 1.0-1.5 mm stainless steel
Core Density	Approximately 7900-8000 kg/m³ for the stainless reservoir and nozzle assembly
Thermal Conductivity	Approximately 14-17 W/(m·K) for the stainless-steel liquid vessel
Surface Finish	Fine-brushed stainless steel with black pressure controls, elastomer feet and sealed labels
Joint Type	Threaded fill cap, regulated compressed-air inlet and clamp-compatible aerosol outlet
Customization	Available based on the intended application and operating environment.

Available Options

One, two, four or six-nozzle configurationsIntegrated compressor or external compressed-air supplyPAO, DEHS or other compatible test-liquid setupFlexible aerosol delivery hosePositive-pressure injection accessoryProtective transport case

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