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 Microtrac BELSORP MINI X Surface Area & Pore Analyzer – Compact BET | 4 Ports, 0.7–500 nm
With every system
  • Installation & training setup and BELCONTROL/BELMASTER 7 onboarding
  • Validated first run a BET measurement on your own material
Gas Adsorption Measurement, Mictrotrac Particle Characterization, Surface Area & Pore Size Distribution · Gas adsorption (volumetric, BET / mesopore)

Microtrac BELSORP MINI X Surface Area & Pore Analyzer – Compact BET | 4 Ports, 0.7–500 nm

Compact volumetric gas adsorption analyzer for BET surface area and mesopore distribution — up to four samples in parallel, helium-free, from 0.01 m²/g.

  • ✔ Surface area from 0.01 m²/g (N₂) — no krypton needed
  • ✔ Pore size 0.7–500 nm (0.35 nm with molecular-probe option)
  • ✔ Up to 4 ports, independent 133 kPa transducer per port
  • ✔ Lead time: configured to order — request current timeline
Prices follow supplier cost and stock availability and are updated regularly. The price you see is today's price — once you order, it's held for 7 days.
Install + training included Tailored service plan
0.01 m²/g min. BET area
4 samples in parallel
38 kg smallest & lightest
He-free no helium calibration

What your process engineer actually checks

Routine BET, done fast

Four samples in parallel, helium-free, from 0.01 m²/g — the MINI X turns daily BET and mesopore QC into a walk-up routine, with an independent transducer per port so results don't wait on each other.

A materials engineer on the line

Configuration and BET/BJH/NLDFT method support from engineers who run surface-area analysis in-house at Additive Plus. Sub-4h reply, NDA standard.

0.01 m²/g
Min. BET area (N₂)
0.7–500 nm
Pore size range
Up to 4
Sample ports
Helium-free
AFSM™2
38 kg
Bench-top weight
About this product

BELSORP MINI X is a compact volumetric gas adsorption analyzer for BET surface area and mesopore distribution — up to four samples measured in parallel, helium-free, from 0.01 m²/g.

What Is the BELSORP MINI X: Compact Multi-Port BET

The BELSORP MINI X measures nitrogen (or argon) adsorption isotherms by the volumetric method with AFSM™2 free-space technology, then derives BET surface area and BJH/NLDFT pore distribution. Each of its up to four ports has an independent pressure transducer, so samples run without waiting on one another. See full specifications below.

BELSORP MINI X side view
Compact multi-port frame, 280×650×465 mm.
BELSORP MINI X accessories
Sample cells and standard accessories.
BELSORP MINI X heater and controller
Heater and controller for sample pretreatment.

Why labs choose the BELSORP MINI X

Daily BET and mesopore analysis, faster and on a smaller bench.

Compact BET workhorse

The smallest, lightest multi-port adsorption analyzer — routine BET and mesopore work on a crowded bench, 280×650×465 mm, 38 kg.

Four ports, per-port transducers

Up to four ports, each with its own 133 kPa pressure transducer, measure independently — one slow sample doesn’t hold up the other three.

Helium-free

AFSM™2 free-space measurement removes the helium calibration step and constant liquid-nitrogen top-ups — faster runs, lower running cost.

Low area without krypton

Measures from 0.01 m²/g in nitrogen, so many low-surface-area samples that usually need krypton run directly on the MINI X.

How Additive Plus delivers it

Configured to your samples, installed and method-supported.

Step 01
Configure

We set port count, gases and the molecular-probe or 21 CFR Part 11 options to your samples and lab requirements.

Step 02
Install & train

Installation, BELCONTROL and BELMASTER 7 training and a validated first BET run on your own material.

Step 03
Method support

BET, BJH and NLDFT method support from engineers who run surface-area and porosity analysis in-house.

Specifications at a Glance

Key figures below — the full set is in the Specifications tab.

Parameter Specification
Method Volumetric + AFSM™2 (helium-free)
Surface area From 0.01 m²/g (N₂)
Pore size 0.7–500 nm (0.35 nm with molecular probe)
Min. relative pressure P/P₀ = 10⁻⁴
Ports Up to 4 (3 in high-accuracy mode)
Gases N₂, Ar, CO₂, CH₄, C₂H₆, H₂, butanes

Typical applications

Where routine BET and mesopore data drive QC and R&D.

Battery materials
Electrode & separator area
Catalysts
Surface area & mesopores
Zeolites & MOFs
Pore structure screening
Ceramics
Powder surface area
Carbon materials
Activated & battery carbons
Pharmaceuticals
Powder surface area, QC
Tell us your samples and throughput — routine BET, mesopore distribution or a regulated 21 CFR Part 11 workflow — and a materials engineer will confirm the right port count and options before you buy. Sub-4h reply, NDA standard.

Why Source the BELSORP MINI X Through Additive Plus

  • Application-matched configuration — ports, gases and molecular-probe or 21 CFR Part 11 options specified to your samples.
  • Installation, BELCONTROL/BELMASTER 7 training and a validated first BET run on your own material.
  • BET, BJH and NLDFT method support from a team that runs surface-area analysis in-house.
  • Leasing and financing available for capital lab equipment · <24h response · systems delivered across 23 countries.
Brand Microtrac
Technology Gas adsorption (volumetric, BET / mesopore)
Certification CE
Weight 84 lb / 38 kg

Product videos

Want data before you commit?

Send a representative sample and we'll run a BET surface area and pore-size measurement on the BELSORP MINI X in our lab, then walk you through the isotherm.

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Common questions

Don't see yours? Email [email protected] — NDA standard, typical reply within 4 hours.

How does the BELSORP MINI X differ from the BELSORP MAX X?
The MINI X is the compact, helium-free workhorse for routine BET surface area and mesopore distribution, measuring down to P/P₀ = 10⁻⁴. The MAX X reaches ultra-low pressure (P/P₀ = 10⁻⁸) for detailed micropore analysis and adds vapor adsorption. Choose the MINI X for daily surface-area and mesopore QC on a small bench; step up to the MAX X when you need micropore resolution or organic-vapor isotherms.
What surface area and pore size range does it cover?
The BELSORP MINI X measures BET surface area from 0.01 m²/g with nitrogen — no krypton required for many low-area samples — and pore size distribution from 0.7 to 500 nm. An optional molecular-probe method extends micropore assessment to 0.35 nm. That covers mesoporous catalysts, battery materials and ceramics in routine QC.
What does helium-free measurement change in practice?
AFSM™2 free-space measurement lets the MINI X determine dead volume without a helium calibration and without constant liquid-nitrogen level top-ups. That removes a consumable and a manual step, shortens each run, and improves repeatability between operators — practical gains when you run BET every day.
How does the four-port design speed up analysis?
Each of the up to four ports on the BELSORP MINI X has its own 133 kPa pressure transducer, so ports measure independently rather than sharing one manifold. A slow microporous sample on one port does not stall the others, which raises throughput for lot comparisons and multi-sample screening. Three ports run in the high-accuracy mode.
Which gases and analysis methods are supported?
Adsorptives include N₂, Ar, CO₂, CH₄, C₂H₆, H₂ and butane isomers. BELMASTER 7 software computes BET and Langmuir surface area, BJH and DH mesopore distribution and NLDFT analysis. An optional FDA 21 CFR Part 11 package supports regulated environments. We help you select the adsorptive and model for your material.
How compact is it and what does it need to run?
The BELSORP MINI X is 280×650×465 mm and about 38 kg excluding the vacuum pump and PC — described by the vendor as the smallest and lightest in its class. It runs on single-phase 100–240 V power and needs a liquid-nitrogen Dewar and the chosen adsorptive gas. Its footprint suits shared or crowded QC benches.
What lead time and support come with the BELSORP MINI X?
The BELSORP MINI X is configured to order, so lead time depends on port count, gases and options such as the molecular probe or 21 CFR Part 11 package — request a current timeline and we confirm it in writing. Every system includes installation, BELCONTROL/BELMASTER 7 training and a validated first BET run on your own material, backed by sub-4-hour application engineering.

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