MAS-100 Libra®

Automated passive microbial air sampling with settle plates

The MAS-100 Libra® automates the handling of sedimentation plates in passive air monitoring. The fully automatic plate changer minimizes manual interventions in critical areas, reduces the risk of cross-contamination, and increases the reproducibility of exposure times.

With automatic plate changes, seamless integration into the isolator HMI, and comprehensive documentation, the system supports the implementation of an Annex 1-compliant contamination control strategy.

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Proven methodology. Now automated.

MAS-100 Libra automatically exposes up to six 90 mm settle plates over a period of up to 24 hours. This significantly reduces the frequency of interruptions to automated processes. Operating personnel gain time for value-adding tasks, while plant operators benefit from higher system availability—with an unchanged, regulatory-approved measurement methodology using settle plates. 

The automated handling of plates and lids minimizes manual interventions in the critical zone, reducing the risk of unintended contamination and operator errors.

At the same time, the exposure duration, position, and sequence of the plates remain constant, improving the comparability of measurement results. Configurable measurement times with optional delays, as well as selectable loading, unloading, and measurement positions, allow precise adaptation to production processes.

Rely on accurately documented data and reliable alerts: The MAS-100 Libra can be integrated directly into the isolator's HMI. Exposure times, plate order, and positions are recorded automatically, and an alarm is triggered in the event of deviations. This eliminates the error-prone manual compilation of these details and the comparison with already incubated plates. 

The complete documentation supports audits and makes it easier to prove that settle plates were exposed exactly as specified in the SOPs. 

The MAS-100 Libra was developed in accordance with GAMP 5. Automated handling of the settle plates facilitates implementation of the contamination control strategy required by EU GMP Annex 1. 

Its low particle emission meets the strict criteria for Class A cleanroom environments. In addition, the instrument can be decontaminated with H2O2. The excellent flow resistance properties of the design cause minimal turbulence and eliminate the risk of backflow onto the exposed settle plate. 

MAS-100 Libra Feature-Highlights

Flexible use

Fixed installation in isolators/RABS via Tri-Clamp mounting, or mobile use on a table or stand in cleanrooms

Integration into the isolator HMI

Accurate documentation and reliable alarm management

Compact design

Easy integration into existing isolators/RABS, supported by a STEP file for layout planning

MBV

24-hour sampling

Automatic changeover of up to six 90 mm plates without manual intervention

100% comparable results

Consistent plate sequence, exposure position, and exposure time

Browser-based configuration

Simple selection of measurement time, delay, and position

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Validation according to GAMP 5

Flexible handling of agar plates
Tested with a wide range of standard and sealable 90 mm plates.

Outstanding flow resistance characteristics
Minimal turbulence without the risk of backflow onto the exposed agar plate.

Low particle emission
Meets the stringent particle emission criteria for Grade A environments.

H₂O₂ compatibility
Proven through rigorous testing with enzymatic and biological indicators.

Advanced error handling
Equipped with intelligent fault detection systems that identify operational issues and ensure reliable, uninterrupted performance.

Flexible use in cleanrooms and containment

The MAS-100 Libra sedimentation plate changer offers flexible deployment options: permanently installed directly in containment systems or used freely in cleanrooms on a fixed surface. This enables seamless integration into a wide range of cleanroom concepts.

Product Specifications

Material
Stainless steel – Sheet: 1.4404, Machined parts: 1.4435

Dimensions
Height 287 mm, Width 256 mm, Depth 139 mm

Required footprint:
356 cm2

Weight
5.3 kg

Plate compatibility
90 mm standard and sealable agar plates

Capacity
1 to 6 agar plates per run for up to 24 hours of autonomous sampling

Average time for plate change
1 minute

Key features:

  • Operating temperature: 0 to +40 °C
  • H₂O₂ compatible
  • Input voltage: 24 V ±10 %
  • Power consumption: <48 W
  • Overvoltage protection: Category 1
  • Configuration via browser user interface without external software installation
  • Integration into SCADA system or similar control system
  • Control interfaces:
    • Digital input/output channels
    • Modbus TCP
  • Selectable loading and unloading position (same or different)
  • Selectable sampling position (left or right)
  • Configurable sampling time
  • Optional sampling delay
  • MAS-100 Libra settle plate changer
  • Tri-clamp connector
  • Tri-clamp sealing gasket
  • Safety sheet
  • Test report
  • Quick Start Guide

Optional accessories:

  • Instrument stand
  • Connector set
  • Remote button
  • Additional Tri-clamp connector
  • Additional Tri-clamp sealing gasket

FAQ

The number of settle plates loaded can vary with each run and does not need to be configured. After loading, the MAS-100 Libra checks how many settle plates are present. The MAS-100 Libra can process any number of plates from 1 to 6.

The MAS-100 Libra can be integrated into subordinate systems via various communication interfaces. Modbus TCP, RESTful API via RJ45 Ethernet, and digital input/output channels are included in the instrument.

The MAS-100 Libra has an alarm system, which means that an alarm is triggered in such cases. If the instrument is integrated into the HMI system of the filling line, the corresponding system will trigger an alarm in accordance with the internal protocol. All error events are recorded in the instrument's log file. The user manual contains a list of possible errors, together with a description of how to rectify them.

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

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Downloads

Vorschaubild PDF:
Brochure


The most important features of the MAS-100 Libra settle plate changer

Vorschaubild PDF:
Application Note


Validation of VHP decontamination of the MAS-100 Libra

Vorschaubild PDF:
Application Note


Visualization of the airflow of the MAS-100 Libra using CFD (computational fluid dynamics) analysis

Vorschaubild PDF:
Article


MAS-100 Libra: the future of continuous cleanroom monitoring

Documents upon request

STEP FILE

Technical 3D model of the MAS-100 Libra for detailed integration into your planning processes

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ROI CALCULATION

MAS-100 Libra Business Case - Determine the timing of your return on investment

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REQUIREMENT SPECIFICATION

User Requirement Specification (URS) for the purchase of the MAS-100 Libra seettle plate changer

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VALIDATION SUMMARY

Summary of the validation of the MAS-100 Libra settle plate changer

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Monitoring Journey
24-hour monitoring summarized in 60 seconds

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?

Florian Blum is happy to find your perfect monitoring match.
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