MAS-100 Atmos®

Compressed gas sampling in a new sphere

The MAS-100 Atmos® was specifically developed for germ collection in process and medical gases.

Based on a germ-friendly collection principle under process pressure, it measures microbial contamination in accordance with ISO 8573-7, ISO 14698, and EN 17141, setting new standards in ease of use, safety, and data integrity.

With flexible configuration options, the instrument supports data integrity-compliant workflows – from user management and sampling to documentation.

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Under pressure? Even better.

The MAS-100 Atmos impresses with its intuitive user interface and easy handling of the collection head. During sampling, the flow is automatically regulated—even with limited flow rates. Decompression is also fully automatic. Its intelligent design allows for convenient and thorough cleaning and disinfection. The compressed gas sampler can be conveniently configured from a computer via the browser-based user interface. 

The comprehensive safety concept protects users and instruments: the mechanical safety lock on the collection head prevents accidental opening under pressure. An integrated HEPA H13 (ISO 35H) protective filter protects the interior of the instrument and prevents the emission of particle-laden exhaust air. 

For even more comprehensive occupational safety, a drain can be connected for the safe removal of test gases. 

The complete, tamper-proof audit trail documents every step of the process in a transparent and traceable manner. Optionally, integrated user management with function-based roles and personal hardware keys enables a 21 CFR Part 11-compliant workflow. A barcode scanner can be used to track the sampling environment and automatically transfer the sampling results to higher-level LIMS/EM systems via a barcode on the display. This minimizes documentation errors.

Whether as a stand-alone solution outside of strict data integrity requirements, as an independent 21 CFR Part 11-compliant instrument, or as a closely integrated component in a LIMS/EM architecture, the MAS-100 Atmos can be precisely adapted to individual processes.

Its versatility is also evident in the gas types it supports, ranging from compressed air to argon and nitrogen to carbon dioxide. It reliably collects germs in pressure ranges from 1.2 to 7 bar and at flow rates of 50 or 100 L/min—with optional automatic flow reduction.

MAS-100 Atmos Feature Highlights

Touchscreen compatible with gloves

Convenient operation with graphical user interface

Flexible interfaces

USB-C, Ethernet, and USB-A for configuration, data export, and system integration

Hygienic design

Easy disinfection, autoclavable perforated lid, and pressure connection tube

MBV

Mechanical safety lock

No accidental opening of the collection head under pressure

Hardware key reader

21 CFR Part 11-compliant user management (optional)

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Gentle collection principle

Standards such as ISO 14698, EN 17141, and ISO 8573-7 require the determination of the bacterial count in process gases. The MAS-100 Atmos uses a particularly gentle method: the impaction of the pressurized gas onto the agar plate takes place under the same pressure as in the pressurized gas system. Only after sampling is the pressure checked and slowly reduced. This protects germs from high shear forces and abrupt drops in pressure and temperature, which could lead to reduced growth and survivability.

Traceable calibration

Reliable microbial measurement results require an accurate collection volume. That is why the gas flow of the germ collector should be checked annually. Our experts calibrate your MAS-100 Atmos at our premises in Stäfa or directly at your site and ensure traceable calibration in accordance with the highest international standards (accredited according to ISO 17025).  

About the calibration service

Product specifications

Material
High-performance plastic

Dimensions
Length 500 mm, width 210 mm, height 180 mm

Weight
7.3 kg

Gas types
Compressed air, argon, nitrogen, CO₂ (automatic gas volume compensation)

Pressure range
1.2–7 bar absolute (depending on gas type and flow mode)

Plate compatibility
90 mm agar plates

Air flow rate & accuracy
50 or 100 L/min, ±5% (optional automatic flow reduction to 50 L/min at low flow rates)

Collection volume
50–3000 standard liters (individually configurable)

Physical separation diameter
d₅₀ = 1.1 µm with standard perforated plate 300x0.6mm

Calibration
Fully automatic with MAS-100 Venus

Battery
Rechargeable battery, autonomy up to 5 hours

Special features

  • Interfaces: USB-C, Ethernet, USB-A
  • HEPA H13 instrument protection filter
  • High-resolution 4.3-inch touchscreen with graphics-based user guidance
  • Display of remaining sampling cycles on the instrument screen
  • Offline access to browser-based user interface for advanced instrument functions
  • Numerous configuration options for maximum flexibility depending on the application
  • Integrated 21 CFR Part 11-compliant audit trail
  • Optional integrated 21 CFR Part 11-compliant, role-based user management (personal user key)  
  • Tamper-proof data export: Manually via browser-based software or direct transfer to LIMS/EM software using sampling barcode
  • MAS-100 Atmos compressed gas sampler
  • Perforated cover 300x0.6mm
  • Pressure connection tube 2m
  • Dust cover
  • Tri-clamp connection with silicone seal
  • Power supply with USB-C cable and region-specific adapters
  • Pre-programmed hardware key (system administrator)
  • Additional hardware keys for optional user management
  • Flow and pressure calibration certificates for MAS-100 Atmos and ISO 17025 certificates for the calibration unit

Perfection means never standing still and constantly improving your products. At MBV, that's exactly what we do.

As of June 2022, the MAS-100 Atmos will replace the previous MAS-100 CG Ex compressed gas germ collector as the global standard. Production of the MAS-100 CG Ex has been discontinued, but repairs and calibrations are still possible.

Discontinued products »

FAQ

The MAS-100 Atmos compressed gas sampler can be used to sample the following gases: compressed air, nitrogen, carbon dioxide, and argon.

The MAS-100 Atmos compressed gas sampler can be used in a pressure range from 1.2 to 7 bar absolute. 

The instrument has two handles for upright transport by hand. Transport with one hand is not recommended. Alternatively, the instrument can also be conveniently transported on a cleanroom trolley. 

Want to dive deeper? Our full FAQ section covers many more questions about the MAS-100 Atmos. Take a look — the answer you’re looking for might already be there!

Dive deeper

Keimsammler für Druckgase MAS-100 Atmos

Downloads

Vorschaubild PDF:
Brochure


MAS-100 Atmos compressed gas sampler

Vorschaubild PDF:
Whitepaper


Overview of use cases with the compressed gas sampler MAS-100 Atmos

Vorschaubild PDF:
SIL


Product launch of the new MAS-100 Atmos microbial sampler

The New MAS-100 Atmos
Next-generation germ collection in compressed gas
The journey from the MAS-100 Atmos
The inspiring story behind its creation

MAS-100 – Your solution for reliable monitoring

Quality You Can Count On

For 40 years, MBV has been developing and producing premium air samplers – precise, reliable, and built to last.

Swiss Excellence

MAS-100 instruments are designed and manufactured in Switzerland. “Swiss Made” is not just a label; it’s our promise turned into reality.

Everything from a Single Source

Fast, flexible, and customer-focused: We provide end-to-end solutions from one hand, enabling you to respond quickly to every challenge.

Close to Customers & Market

Working hand in hand with our clients, we create tailored solutions that meet real-world requirements.

Regulatory Compliance

Our documentation meets international standards, ensuring smooth audits, validations, and maximum safety.

Any questions or not sure what fits best?

Andy Zingre is happy to find your perfect monitoring match.
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