RuboSORP MSB

INTRODUCTION

Accurate mass measurement is critical across materials science, chemical engineering, energy storage, and catalysis research. While traditional electronic microbalances offer high precision under standard laboratory conditions, they are often unsuitable for extreme environments involving high pressure, high temperature, or corrosive and reactive gases. The Magnetic Suspension Balance (MSB) addresses these challenges with contactless, high-resolution mass measurement in fully isolated, controlled environments.
The RuboSORP MSB employs a magnetically coupled weighing system that physically separates the microbalance from the sample atmosphere. This design allows for real-time gravimetric analysis under demanding conditions—without the need for purge gases or proximity protections—enabling accurate study of sorption processes, adsorption kinetics, vapor-liquid equilibria, and gas-phase density.
Samples are housed within a sealed, corrosion-resistant chamber. Any change in mass is transmitted through a magnetic assembly to a high-precision microbalance operating at ambient pressure. This contact-free transfer ensures long-term stability, exceptional resolution, and minimal signal drift—even over extended experimental durations or during thermal cycling.
A standout feature of the RuboSORP MSB is its dual-sample capability. The system can simultaneously analyze two samples or substitute one with a calibrated sinker for direct gas density measurement via Archimedes’ principle. This is especially valuable in high-pressure or multi-component gas systems where conventional equations of state fall short.

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RuboSORP MSB

FEATURES

Automatic Drift Correction & Recovery
The RuboSORP MSB actively compensates for pressure and temperature-induced drift, maintaining accurate readings throughout adsorption, desorption, or thermal cycles. A builtin self-recovery system prevents data loss in case of unexpected motion or imbalance, ensuring uninterrupted experiments.
Density / Double Sample Measurement
The dual sample measurement module enables experiments with two samples simultaneously. One position can be fitted with an inert float or calibrated sinker, allowing direct measurement of gas density via Archimedes' principle—especially critical at high temperatures and pressures where traditional equation-of-state methods become unreliable. This capability is particularly valuable in multicomponent gas adsorption studies, as it enables real-time tracking of composition changes without the need for external gas analysis tools such as chromatography.
Optional Viewing Cells
Optional high-pressure viewing cells provide in-situ visual access to the sample chamber, enabling direct observation of swelling behavior, phase transitions, and vapor–liquid equilibrium phenomena. A highstrength window allows monitoring of expansion and adsorption processes in polymer and ionic liquid samples through an integrated image acquisition system. The system operates reliably under extreme conditions, with a maximum temperature of 200 °C and pressure up to 35 MPa.
Optional Viewing Cell

Modular Design & Flexible Configuration
The RuboSORP MSB features a fully modular setup with interchangeable components for pressure, temperature, gas dosing, and reactor control. Visual cells, custom sample holders, and a range of heating options—from cryogenic to high-temperature—ensure adaptability to diverse applications.
Smart Software & Data Integrity
Automated control software manages all experimental parameters in real time and includes built-in uncertainty analysis. It supports ISO 9001 and GUM standards, generates adsorption curves on the fly, and logs data in accessible formats for seamless analysis and reporting.
Sealed Coupling Chamber
Enables safe use of toxic, reactive, and corrosive fluids—allowing experiments to be conducted under real-world conditions without compromising balance integrity.
Customizable Sample Cells and Reaction Baskets
To simulate real-world reaction conditions, AMI offers a range of interchangeable measuring cells and sample basket modules. Sample cell dimensions—up to 70 mm in diameter—can be customized to suit various materials and experimental needs. AMI also provides tailored solutions, including the development of new basket designs based on customer requirements. Available options include FF-type fixed bed baskets, FT-type high-efficiency reaction baskets, and specialized baskets designed for ionic liquids.
Industry-Leading Sample Capacity
Supports the widest max sample capacity, accommodating large or irregular samples without compromising accuracy—ideal for heterogeneous materials and custom applications.
Exceptional Stability Over Time
The system uses a load decoupling mechanism to periodically remove the sample from the balance, perform automatic recalibration, and resume the experiment—ensuring long-term measurement stability and eliminating drift during extended runs.

DATA ANALYSIS

The RuboSORP MSB can measure various types of gas adsorption isotherms, determine adsorption isobars, obtain adsorption kinetics curves, and conduct multi-component competitive adsorption.
It can handle all common gases, including but not limited to hydrogen, nitrogen, methane, carbon monoxide, carbon dioxide, and oxygen, as well as corrosive gases such as: chlorine, hydrogen sulfide, and sulfur dioxide. Additionally, it can be paired with a visual measurement module or a separate visual observation module to study the absorption or volume change of supercritical carbon dioxide.
Application of two-component competitive adsorption
For the study of competitive adsorption of two-component gases, AMI offers an ingenious solution, which is to measure the density of the gas mixture at adsorption equilibrium in real time through a special three-position Magnetic Suspension Balance, and then calculate the adsorption amount of each gas in the two component gas in real time through software, without the need for external chromatography/mass spectrometry tools.
Sulcis coal sample carbon dioxide/methane binary competitive adsorption data

PRESSURE SYSTEM

The RuboSORP MSB’s gas system is equipped with two high-precision pressure sensors: a sensor with a range to 5 MPa and a sensor with a range to 40 MPa, both with an accuracy of 0.01 bar
Gas System Models:

System Type	Model No.	Pressure range(bar)	Temperature Control	Intake quantity	Option
Dynamic Gas System	GDU-150D-A	150	none	2	Mechanical pump/ Molecular pump Vapor dosing Extra gas path Additional pressure sensor
	GDU-150D-H	150	100℃	2
	GDU-350D-A	350	none	2
	GDU-350D-H	350	100℃	2
Static Gas System	GDU-150S-A	150	none	2	Mechanical pump/ Molecular pump Vapor dosing Extra gas path Additional pressure sensor
	GDU-150S-H	150	100℃	2
	GDU-150S-H mix	150	100℃	3
	GDU-350S-A	350	none	2
	GDU-350S-H	350	100℃	2
	GDU-350S-H mix	350	100℃	3
	GDU-700S-A	700	none	2
	GDU-700S-H	700	100℃	2
	GDU-700S-H mix	700	100℃	3

SPECIFICATIONS

Model	Max Pressure	Max Temperature	Max Sample Loading	Resolution	Vacuum Option	GDU Capability	View Cell & Camera Option	Model
MSB-150	150bar	400°C	25g	10μg	Yes	Dynamic or Static	Yes	MSB-150
MSB-150	150bar	400°C	50g	10μg	Yes	Dynamic or Static	Yes	MSB-150
MSB-150	150bar	400°C	10g	1μg	Yes	Dynamic or Static	Yes	MSB-150
MSB-350	350bar	400°C	25g	10μg	Yes	Dynamic or Static	Yes	MSB-350
MSB-350	350bar	400°C	50g	10μg	Yes	Dynamic or Static	Yes	MSB-350
MSB-350	350bar	400°C	10g	1μg	Yes	Dynamic or Static	Yes	MSB-350
MSB-700	700bar	150°C	25g	10μg	Yes	Static Only	No	MSB-700
MSB-700	700bar	150°C	50g	10μg	Yes	Static Only	No	MSB-700
MSB-700	700bar	150°C	10g	1μg	Yes	Static Only	No	MSB-700

APPLICATIONS

Hydrogen & Methane Storage
High-pressure isotherms provide real-world data critical for evaluating advanced storage materials including MOFs and metal hydrides.
Corrosive Gas Research
Quantify adsorption of SO₂, HF, Cl₂, and similar aggressive gases at controlled temperature and pressure—safely and accurately.
Supercritical CO₂ Studies
Track sorption behavior and reaction kinetics in polymers, biomass, or coal under supercritical conditions with full visual feedback and gas-phase density measurement.
Multi-Component Adsorption
By integrating a calibrated gas mixer, the MSB measures real-time competitive adsorption of gas mixtures, eliminating the need for offline chromatography.

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