AMI
Meso 400

Gas Adsorption Analyser

Balances high-throughput testing with independent station control.
Available with 4 analysis ports, each with in-situ degassing capability.
Simultaneously analyse different adsorbate gases across up to 4 stations.

Gas Adsorption Meso 400 ● Balances high-throughput testing with independent station control. ● Available with 4 analysis ports, each with in-situ degassing capability. ● Simultaneously analyse different adsorbate gases across up to 4 stations.

The AMI-Meso 400 is a compact, high-performance sorption analyser designed for the precise characterisation of mesoporous and macroporous materials. Equipped with four fully independent analysis stations, it enables the determination of BET surface area, total pore volume, and pore size distribution with maximum efficiency.

Each analysis station features an individual dosing volume, allowing fully autonomous operation with independent programming and initiation at any time—eliminating downtime between analyses. This design ensures highly reproducible results and optimised throughput.

The AMI-Meso 400 supports a wide range of non-corrosive adsorptive gases, including N₂, CO₂, Ar, Kr, H₂, O₂, CO, NH₃, and CH₄, providing exceptional flexibility for various research and industrial applications. Additionally, all four stations function as in-situ degassing units, enabling efficient sample preparation within the same system.

Key Features

Module Design for Minimal Dead Volume

The internal gas path design of the instrument adopts a unique integrated metal module design, which not only reduces the internal dead volume space but also helps mitigate possible leaks.

Saturated Vapor Pressure P₀

An independent P₀ pressure transducer is configured at 133 kPa for P₀ value testing, enabling real-time P/P₀ measurement for more accurate and reliable test data. Alternatively, an atmospheric pressure input method can be used to determine P₀.

Independent analysis ports

With independent analysis ports, the system employs a unique vacuum control logic that allows each station to operate without disruption, even when using a single mechanical pump or pump group. This enables simultaneous, independent experiments, meeting diverse adsorbent testing needs while ensuring high efficiency.

Thermal Stabilisation

A core rod in the sample tube reduces dead volume and stabilises the cold free space coefficient, while an iso-thermal jacket maintains a constant thermal profile along the tube. Additionally, automatic helium correction ensures precise calibration for any powder or particulate material, minimizing temperature-related deviations during analysis.

High Accuracy Pressure Transducers

Equipped with 1000 torr pressure transducers, the Meso Series enables precise physical adsorption analysis, achieving a partial pressure (P/P₀) as low as 10^-2 for nitrogen (N₂) at 77 K.

Optimised Manifold Contamination Control

This system features a multi-channel, adjustable, and parallel vacuum design with segmented vacuum control. This setup effectively prevents samples from being drawn up into the analyser therefore preventing manifold contamination.

Liquid Nitrogen Dewar

The use of 1 L Dewar flasks in conjunction with a sealed cover ensures a stable thermal profile along the entire length of both the sample tubes and P₀ tubes throughout the testing process.

Sample Preparation

Equipped with four in-situ degassing ports, enabling simultaneous degassing and analysis. Each port offers independent temperature control from ambient to 400°C, ensuring precise sample preparation.

Software

PAS Software is an intelligent solution for operation control, data acquisition, calculation, analysis, and report generation on the Windows platform. It communicates with the host via the LAN port and can remotely control multiple instruments simultaneously.

PAS Software adopts a unique intake control method, optimising pressure in the adsorption and desorption processes through a six-stage setting, which improves testing efficiency.

Changes in pressure and temperature inside the manifold can be directly observed in the test interface, providing convenience for sample testing and instrument maintenance. The current state of analyser can be intuitively understood with the indicator light and event bar.

Each adsorption equilibrium process is dynamically displayed on the test interface. Adsorption characteristics of the sample can be easily understood.

A clear and concise report setting interface, including the following:

Adsorption and desorption isotherms

Single-/Multipoint BET surface area

Langmuir surface area

STSA-surface area

Pore size distribution according to BJH

T-plot

Dubinin-Radushkevich

Horvath-Kawazoe

Saito-Foley

Applications

Carbon Black

Technical Specs

Model	AMI Meso 400
Analysis Ports	4
P0 Transducer	4
Analysis Pressure Transducer	4
Accuracy (Pressure Transducers)	1000 Torr
Pump	1 mechanical pump (ultimate vacuum 10⁻² Pa)
P/P0	10⁻⁴ – 0.998
Surface Area	≥ 0.0005 m²/g, test repeatability: RSD ≤ 1.0%
Pore Size	0.35–500 nm, test repeatability: ≤ 0.02 nm
Pore Volume	≥ 0.0001 cm³/g
Degassing Ports	4 in-situ
Absorbates	N₂, Ar, Kr, H₂, O₂, CO₂, CO, NH₃, CH₄, etc.
Cold Trap	1
Volume and Weight	38.5 in (980 mm) × 25.0 in (630 mm) × 38.5 in (976 mm), 176–199 lbs (≈90 kg)
Power Requirements	110 or 200–240 VAC, 50/60 Hz, max power 300 W