Made to order
- Installation & training on-site setup and BELCONTROL/BELMASTER onboarding
- Validated first run a measurement on your own sample before sign-off
Microtrac BELSORP MAX X Gas Adsorption Analyzer – Surface Area & Pore Size (BET) | 0.35–500 nm, 4 Ports
Manometric (volumetric) gas adsorption analyzer for BET specific surface area and pore size distribution — 0.35–500 nm pores, N₂ / Ar / CO₂ and organic vapors, up to four samples in parallel, referenced to ISO 9277 and ISO 15901-2.
- ✔ Surface area from 0.01 m²/g (N₂) · 0.0005 m²/g (Kr)
- ✔ Micropore to macropore: 0.35–500 nm, P/P₀ down to 10⁻⁸
- ✔ Up to 4 measurement ports · 3 gas ports expandable to 12
- ✔ Lead time: configured to order — request current timeline
What your process engineer actually checks
Resolution you can trust
Adsorption from P/P₀ 10⁻⁸ with NLDFT and GCMC models resolves micropores that bench-top analyzers average over. Every isotherm is traceable to ISO 9277 and ISO 15901-2 — not a marketing curve.
An applications engineer on the line
Configuration, method development and troubleshooting from engineers who run powder and porosity analysis in-house at Additive Plus. Sub-4h reply, NDA standard.
BELSORP MAX X is a manometric (volumetric) gas adsorption analyzer for BET specific surface area and pore size distribution — resolving pores from 0.35 to 500 nm and surface areas down to 0.01 m²/g on up to four samples at once.
What Is the BELSORP MAX X: High-Resolution Gas Adsorption
The BELSORP MAX X measures adsorption and desorption isotherms by the manometric method with AFSM™ saturated-pressure monitoring, then derives BET surface area, pore size distribution and pore volume. It covers the full range from micropores in zeolites, MOFs and activated carbons to mesopores and macropores in catalysts, battery materials and ceramics. See full specifications below.



Why labs choose the BELSORP MAX X
Resolution, throughput and standards conformance in one bench-top platform.
Micropore resolution
Adsorption from P/P₀ 10⁻⁸ resolves micropores in zeolites, MOFs and carbons — HK, SF, MP, NLDFT and GCMC models built in.
Four samples at once
Up to four ports measure in parallel; three gas ports expand to twelve via the gas selector — throughput without a second instrument.
Gas and vapor in one
N₂, Ar, CO₂, H₂, Kr and organic vapors (H₂O, benzene, alcohols) on one platform — water-vapor sorption to P/P₀ ~0.95 at 40 °C.
Standards-referenced
Conforms to ISO 9277 (BET), ISO 15901-2 (mesopore) and ISO 18852 — the traceable numbers your QC and R&D sign-off need.
How Additive Plus delivers it
Configured to your materials, installed and method-supported — not drop-shipped.
Configure
We match ports, gas selector, cryostat and the vapor option to your materials — battery, catalyst, pharmaceutical or ceramic.
Install & train
Factory-standard installation, BELCONTROL and BELMASTER training, and a validated first measurement on your own sample.
Method support
BET, t-plot, BJH and DFT method development from engineers who run adsorption analysis daily — not a remote ticket queue.
Measurement Range & Methods
Full analytical range at a glance — detailed values are in the Specifications tab.
| Parameter | Range |
|---|---|
| BET surface area | From 0.01 m²/g (N₂); from 0.0005 m²/g (Kr) |
| Pore size distribution | 0.35 – 500 nm |
| Relative pressure (P/P₀) | 10⁻⁸ – 0.997 (N₂ 77 K, Ar 87 K) |
| Measurement ports | Up to 4 (3 on HP model) |
| Gas ports | 3 standard, expandable to 12 |
| Pretreatment | 50 – 550 °C |
| Analysis models | BET, Langmuir, t-plot, αs, BJH, DH, HK, SF, MP, NLDFT, GCMC |
Typical applications
Where high-resolution surface area and porosity data drive the decision.
Why Source the BELSORP MAX X Through Additive Plus
- Application-matched configuration — ports, gases, vapor and cryostat specified to your materials, not a generic bundle.
- Installation, BELCONTROL/BELMASTER training and a validated first measurement on your own sample.
- Method development support (BET, t-plot, DFT) from a team that runs powder and porosity analysis in-house.
- Leasing and financing available for capital lab equipment · <24h response · systems delivered across 23 countries.
| Brand | Microtrac |
| Technology | Gas adsorption (manometric / volumetric) |
| Certification | CE, ISO 15901-2, ISO 18852, ISO 9277 |
| Weight | 110 lb / 50 kg |
Product videos
Send a representative sample and we'll run a BET surface area and pore-size measurement on the BELSORP MAX X in our lab, then walk you through the isotherm.
Common questions
Don't see yours? Email [email protected] — NDA standard, typical reply within 4 hours.
What surface area range can the BELSORP MAX X measure?
Which gases and vapors does it support?
How many samples can it measure at once?
What standards does the BELSORP MAX X conform to?
What analysis methods are included in the software?
What sample pretreatment (degassing) is required?
What lead time and support should we expect?
Place your order, or talk to an engineer first
Order Microtrac BELSORP MAX X Gas Adsorption Analyzer – Surface Area & Pore Size (BET) | 0.35–500 nm, 4 Ports direct, or talk to materials engineer