PM series BET Specific Surface Area Pore Size Analyzer

Test Theory

adsorption and desorption isotherm    

BET specific surface measurement (single point/multi-point method)

Langmuir Specific surface;

Statistics adsorption layer thickness method external specific surface;

BJH method pore volume and pore size distribution;

MK-plate method (parallel-plate model) pore volume and pore size distribution;

D-R method micro-hole analysis;

t-plot method (boder) micro-pore analysis;

H-K method (Original) micro pore analysis;

MP method (Brunauer) micro-pore analysis;

True density test;

Granularity assessment report.

Test Range

Specific surface 0. 0005m2/g to no-upper limit;

Pore size: 0.35-500 nm (micro pore normal analysis: 0. 35-2nm; mesoporous analysis: 2-50 nm; macro porous analysis:  50nm-500nm), which can realize precise analysis to micropore segment.

Total pore volume: 0.0001cc/g to no upper mite

Measurement precision

Specific surface area repeated accuracy ≤± 1.0%; most probable pore size repeated error ≤0.02nm; true density  ≤±0.04%, external surface area ≤± 1.5%.

Analytical station

One or two analytical station, one P0 station, two processing stations;

Degassing treatment to test one sample and two samples, and the test process and degassing treatment of the samples can do at the same time; test system and degassing system are mutually separated.

Independent P0

With independent saturated vapor pressure (P0) test station, to guarantee the high accuracy of differential pressure test.

(Static method specific surface and pore size analyzer saturated steam pressure test device, Patent Number: ZL201120136959.X)

Test System

According to international standard “Nitrogen +helium” test mode, it can make use of helium to test temperature area volume, to make the test accuracy much higher with better repeatability.

Pre-treatment

2-way degassing station; degassing process will be automatically controlled by software with independent temperature-controlling, independent timing and vacuum pump starting and stopping and other functions. It supports sample degassing treatment at different temperatures and different times made simultaneously with the test; and it also has pre-set function of pre-treatment starting and stopping time, to realize unattended operation test and sample treatment, which will improve working efficiency largely.

Optional treatment mode: it is equipped with “common heating vacuumizing molecular diffusion mode” and “molecular substitution mode”

(Static method specific surface and pore size analyzer’s purified pre-treatment device, patent number: ZL201120136943. 9)

Gas channel system

Beishide originally developed BEST multi-way divided manifold system, it has complete overall integrated design to controlling valves, there are no any threaded seal or pipeline crimping or welding connectors, to minimize vacuum pipelines as practical as possible, so as to eliminate air-leakage points, and make the air leaking ratio lower than 10-10Pa*m3/s, and airtightness will be improved by more than 5 times, to reach the level of imported high-end instrument, which will improve the stability and accuracy of the instrument significantly; every part of the gas channel system will be modulized to install, reduce failure rate significant and enhance the stability of the instrument largely.

Gas-controlling valve

It adopts originally imported SMC gas controlling valve from Japan, which can solve the gas expansion problem for heating resulting from the heating of solenoid valve.  

Drift diameter of pipelines

Large drift diameter is the essential conditions of high vacuum, degassing bit and test bit will adopt large drift diameter valve and pipelines, to make the ultimate vacuum of vacuum pump to exert itself to the maximum extent.

Cold trap

Degassing gas channel, it will analyze gas channel independent dual cold-trap device, can eliminate the moisture, oil materials and other impurities in the gas channel thoroughly.

Vacuum system

The instrument is equipped with two sets of independent vacuum system, i.e. degassing system and analytical system are mutually independent; degassing system is equipped with independent dual-level mechanical vacuum pump, ultimate vacuum is up to 10-2Pa, analytical bit is equipped with independent dual-stage mechanical vacuum pump + Germany originally imported turbine molecular pump, ultimate vacuum is up to 10-6Pa; the two sets of independent vacuum system constitutes of three pumps can not only improve test efficiency, but also eliminate the mutual influence of analysis and degassing truly and thoroughly when they are running simultaneously, so as to avoid the pollution issues resulting from one set of vacuum system.

Pressure test

Originally imported capacitor film pressure sensor, segment test: 0-1000torr，0-10torr，0-0.1torr (for your options)

The reading precision error is ≤0.15%, which is the highest precision for present pressure sensor; it adopts differential pressure test, which can improve the test accuracy of different pressure segments; micro pore segment differential pressure P/P0 can be up to 1×10-8 with more than 50 pieces of points; large pore segment will be equipped with a real-time test function of P0, which makes the controlling precision when P/PO is tending to critical point to up to 0.998.

Sample category

Powder, particle, fiber and flaky materials and other materials that can be loaded in the sample tube.

Liquid level control

Beishide originally developed liquid nitrogen surface servo keeping system can be used to eliminate the dead volume change resulting from liquid nitrogen surface changes by virtue of volatilization of liquid nitrogen during the test, so as to improve test precision.

Calibration gas

It is equipped with 99.999% high-purity HE; as well as helium dead-volume test function and temperature area test function; it can be used to get higher accuracy.

Test gas

High purity nitrogen and other selective multiple gases according to the requirement of users, such as CO2, Ar, Kr and so on, which will be equipped with four-way independent inlet openings.

Flying-

prevention

Software and hardware coordination will eliminate elutriation and boiling occurrence thoroughly:

Beishide originally developed non-obstructive-type environmental control system with principle of vortex dust falling, combining with the flying-prevention procedure; it can eliminate any elutriation and boiling phenomenon of samples that are volatile in highly vacuum conditions, so as to avoid polluting the valve pipelines that cause the decrease of systematic tightness.

( Static method specific surface and pore size analyzer with dedusting and pollution-prevention device, patent number: ZL201320045881.X)

Vacuum pump

Germany originally imported dual-stage mechanical vacuum pump + Germany originally imported turbine molecular pump, full-process software Auto- starting and stopping controlling.

Liquid nitrogen cup

It is equipped with 3L large volume, small-bore Dewar, which can guarantee no need to adding liquid nitrogen in at least 90 hours.

After-sale service

Professional and complete after-sale service system can provide 24 hours of telephone counseling, 49 hours of door-to-door service, we have set up service center in Beijing, Shanghai, Guangzhou, so as to make every effort for the normal running of user’s instruments.

Dimension of Instrument

Size: L 78cm W 50cm H 47cm, Net weight: 32Kg, Pressure AC220v±5%, its power is less than 500W.