Microbiological Environmental Monitoring Products

Compressed Gas Microbial Sampler

A pressure-aware sieve-impaction instrument that collects microorganisms from process gases onto agar before controlled automatic decompression.

Under-Pressure Microbial Impaction
Gas-Specific Flow Regulation
Automatic Decompression
Portable Battery Operation

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Product Introduction

The Compressed Gas Microbial Sampler connects to a regulated process-gas outlet and maintains the culture plate within a pressure-rated impaction chamber during collection. Pressure and mass-flow sensors adjust the metering path for the selected gas while a perforated lid distributes the stream over agar. Keeping impaction under pressure avoids the sudden dynamic decompression that can injure microorganisms and produce false-low recovery. After the programmed normal-liter volume is reached, the unit performs a controlled decompression step before the chamber is opened.

Key Features

Under-pressure collection protects microbial recovery from abrupt expansion at the sample point.

Gas-specific mass-flow correction supports compressed air, nitrogen, carbon dioxide and argon.

Automatic pressure measurement, flow selection and decompression reduce manual valve errors.

A pressure hose and optional exhaust line route inlet and discharged gas safely.

Customer Product Concerns

Compressed-gas monitoring must reduce pressure without damaging organisms, miscalculating gas volume or discharging hazardous gas into the work area.

Rapid decompression stresses captured microorganisms and can lower recovery.The culture plate remains in a pressure-rated chamber during impaction, followed by controlled decompression.

Different gas density causes inaccurate volume when one calibration is assumed.Gas selection, pressure sensing and mass-flow regulation calculate and control the appropriate normal-liter volume.

Insufficient utility flow prevents the configured 100 L/min sample rate.An automatic lower-flow mode can continue within the qualified operating configuration.

Carbon dioxide or contaminated exhaust accumulates near the operator.A dedicated exhaust connection accepts tubing for controlled discharge to a suitable location.

Typical Applications

Pharmaceutical compressed airNitrogen blanketing systemsCarbon dioxide process supplyArgon and other validated utility gases

Technical Parameters

Typical materials and dimensions for a portable pressure-regulated microbial gas sampler are listed below.

Core Material	High-performance molded polymer body with anodized aluminum or stainless pressure chamber
Panel Thickness	180-220 mm body depth
Effective Width	180-230 mm instrument width
Maximum Length	Up to 500 mm overall height including handle and chamber
Steel Facing Thickness	1.0-2.0 mm pressure-chamber and fitting walls
Core Density	1050-8000 kg/m³ across polymer body and metal pressure components
Thermal Conductivity	0.12-17 W/(m·K) across polymer body and stainless components
Surface Finish	Dark navy cleanable polymer with satin stainless pressure chamber, black glass and teal indicators
Joint Type	Pressure-rated PTFE inlet hose, 3/8 inch fitting, mini tri-clamp chamber and regulated exhaust connector
Customization	Available based on the intended application and operating environment.

Available Options

50 or 100 L/min sampling headCompressed air, nitrogen, carbon dioxide or argon programExhaust tubing setBarcode and secure data-management functions

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