Meso 112/222

● Available with 2 analysis ports, each with in-situ degassing capability.
● Simultaneously analyze different adsorbate gases across up to 2 stations.
● Each port features an independent gas inlet (excluding Meso 112 model).

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Product Overview

Introduction

The AMI-Meso112/222 Series is engineered for high-precision surface area and pore size characterization of powdered materials. This series comprises two models, Meso 112 and Meso 222, both integrated with 1000 torr pressure transducers at each analysis station for accurate BET surface area determination and mesopore size distribution analysis.

Each analysis port is equipped with an in-situ degassing module capable of heating samples up to 400°C, ensuring efficient removal of adsorbed contaminants prior to analysis. This in-situ degassing eliminates the risk of contamination associated with sample transfer. Additionally, when multiple stations are utilized, each operates independently, allowing for simultaneous yet discrete analyses of different samples.

Features

Software

Applications

Typical Analysis Result

Specification

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 spacebut 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.

Datasheet

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 Stabilization

A core rod in the sample tube reduces deadvolume and stabilizes 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.

Optimized 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 analyzer 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, optimizing 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 analyzer 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

Applied Field Typical Materials Details
Material Research Ceramic powder, metal powder, nanotube According to the surface area value of the nanotube, hydrogen storage capacity can be predicted.
Chemical Engineering Carbon black, amorphous silica, zinc oxide, titanium dioxide Introduction of carbon black in rubber matrix can improve the mechanical properties of rubber products. Surface area of carbon black is one of the important factors affecting reinforcement performance.
New Energy Lithium cobalt, lithium manganate Increasing the surface area of the electrode can improve the electrochemical reaction rate and promote ion exchange in the negative electrode.
Catalytic Technologies Active alumina oxide, molecular sieve, zeolite Active surface area and pore structure influence reaction rate.

Typical Analysis Result

The specific surface area test results for iron ore powder are shown in the figure below. As a material with an inherently low specific surface area, the repeatability error in the measurements is only 0.0015 m²/g, demonstrating high testing precision.

Analysis of pore size distribution of activated carbon materials by NLDFT.

Adsorption and Desorption Isotherms of typical macroporous material – silica.

Specification

Category AMI-Meso 112 AMI-Meso 222
Analysis Ports 2 2
P0 Transducer 2 2
Analysis Pressure Transducer 1 2
Accuracy (PTs) 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: ≤ 0.2 nm
Pore Volume ≥ 0.0001 cm³/g
Degassing Ports 2 in-situ
Adsorbates N₂, CO₂, Ar, Kr, H₂, O₂, CO, CH₄, etc.
Cold Trap 1
Volume & Weight L 34.5 in (870 mm) × W 22.5 in (570 mm) × H 35.0 in (890 mm), 188 lbs (85 kg)
Power Requirements 110 or 200–240 VAC, 50/60 Hz, max power 300 W

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