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BSD VVS /DVS / VVS&DVS Gravimetric Vapor Sorption Analyzer

The Gravimetric Sorption Analyzer accurately measures the adsorption and desorption behavior of samples by directly weighing mass changes in real time before and after adsorption, under controlled relative partial pressures. Using a high-precision microbalance, it offers superior accuracy compared to volumetric methods, eliminating common sources of error such as temperature-induced zone distribution and non-ideal gas corrections.This analyzer overcomes the limitations of volumetric methods by enabling real-time, isobaric adsorption rate measurement and providing precise data on adsorption kinetics, which are essential for understanding material behavior.The BSD Vacuum & Dynamic Gravimetric Vapor Sorption Analyzer enhances this functionality with high throughput capabilities, allowing for the simultaneous analysis of up to 8 samples. Its fully automated cyclic testing feature significantly boosts laboratory efficiency, reducing the need for repetitive tasks and freeing researchers to focus on more complex analyses.

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Key Feature

High Throughput

4 or 8 analysis positions; Simultaneous test;

Automation

Automatic and Fast switch from activation to adsorption test

Microbalance Resolution/Range

1ug/5000mg, 0.1ug/500mg optional

Balance Auto Calibration

Automatic calibration before every test

Auto Cyclic Test

Repeated test to learn material durabilty and lifetime evaluation

Thermostatic Pipeline

~60℃ (optional 80℃), accuracy 0.1℃;

Programmed heating

32-stage programmed heating to prevent pipeline contamination

Blank position background Subtraction

Measure mass influence of background buoyancy for system subtraction calculation

Multi sampels performance comparison

Multi sample simultaneous test under same environment

Specifications

Model	BSD-VVS (Vacuum Static Method)	BSD-DVS (Dynamic Method)
	BSD-VVS&DVS (full-function version, vacuum static + dynamic)
Function	Adsorption-desorption Isotherms
	Isobaric adsorption kinetics ( adsorption rate) Analysis
	Fully automatic adsorption cycle life evaluation
Analysis Positions	4 or 8 analysis positions;
	Simultaneous analysis of multiple analysis positions in the same background environment
Microbalance Resolution/Range	Industrial microbalance, 1ug/5000mg, 1ug/10000mg (0.1ug/500mg optional);
Organic Vapor	yes	yes
Non-Corrosive Gas	yes	yes
Corrosive gas	no	yes
Auto-Switch Furnace and Waterbath (Optional)	Fully automatic switching between heating furnace and thermostatic water bath, Fast switch from activation to adsorption test
Auto Cyclic Test (Optional)	Automatic cyclic test of repeated adsorption and desorption to learn material durabilty and lifetime evaluation
Adsorption chamber temperature	Constant temperature bath, -5℃～150℃, accuracy ±0.1℃;
Thermostatic Pipeline	~60℃ (optional 80℃), accuracy 0.1℃;
Steam generation	“Static Evaporation” Method	Bubbling method
Humidity	0.1%～98% P/P0	2%～98% P/P0, lower P/P0 is optional
Reagent tube	120ml	120ml Reagent condensation recovery
Sample Activation	Vacuum degassing, molecular pump high vacuum degassing function is recommended	Atmospheric pressure purge degassing
	Room temperature ~ 400℃, accuracy ±0.1℃;	Room temperature ~ 300℃, accuracy ±0.1℃;
Programmed heating	32-stage programmed heating to prevent pipeline contamination ;
Visual Process UI	Visual information of real-time sample weighting, accurately judge whether the sample is completely degassed;
Buoyancy correction	Mode 1: Buoyancy calculation mode (default); Mode 2: Blank buoyancy background subtraction mode; Mode 3: Background subtraction curve mode;
Blank position background Subtraction	Measure blank position to learn real influence of background buoyancy and for system subtraction calcuation;

Vapor removal	Vacuum mechanical pump + steam pump; Programmed steam removal;	Purging
Optional Molecular pump	molecular pump, vacuum degree> E-6torr;	/
Segmental pressure measurement	Dual pressure sensor segment test; Capacitive film pressure sensor	/
Pneumatic vacuum flapper valve	Pneumatic vacuum flapper valve with zero heat generation	/

Simultaneous Analysis of 4 or 8 Samples

The analyzer is designed for high throughput, offering 4 or 8 analysis positions to enable simultaneous analysis of multiple samples. With all analysis positions housed within the same adsorption chamber, the system ensures that each sample is tested under identical environmental conditions, allowing for direct and reliable comparison of sample performance. This configuration maximizes efficiency and provides excellent cost efficiency.

Automatic Cyclic Test

Researchers often perform multiple cycles of adsorption and desorption tests to assess material durability and predict service life. However, this process is time-consuming and labor-intensive, requiring repeated manual testing. To address this challenge, our R&D team has developed an innovative solution that enables rapid switching between activation and testing phases, while also automating the multiple cycles of repeated adsorption and desorption. This system eliminates the need for manual intervention, streamlining the testing process and providing valuable, long-term data on material durability and performance.

Background Buoyancy Measurement

The BSD Gravimetric Sorption Analyzer offers two advanced modes for buoyancy subtraction, enhancing accuracy and precision in measurements. In addition to theoretical calculations, the system supports direct background buoyancy measurement at a blank position. This allows for real-time correction of the calculation using either the blank position data or curve subtraction. The direct background measurement at the blank position provides higher precision compared to theoretical estimates, making this an innovative and unique feature of the BSD design.