Product Description

The ST-SA4000 Specific Surface Area and Pore Size Analyzer adopts the volumetric method principle specified in GB/T19587. It is a multi-station instrument for analyzing the specific surface area, pore size distribution, total pore volume and average pore size of
mesoporous and macroporous nanomaterials. After generations of upgrading and optimization, the equipment can meet users’ application requirements to the maximum extent. This series features an integrated design, with the degassing module integrated into the

instrument mainframe, greatly saving laboratory space. The patented AI intelligent degassing station addresses issues such as contamination and failed sample preparation caused by elutriation of ultra-light and ultra-fine powders.

Technical Features :
 3 sample analysis stations and 3 degassing stations (optional)
 Brand-new software with powerful functions and user-friendly operation
 Intelligent Sample Degassing Station (Patented)
 Equipped with a precision pressure control module for further improved stability
 Rich test templates available for one-click calling

1. Analytical Performance
1.1 Analytical Principle: Vacuum Static Volumetric Method
1.2 Data Report: Gas Adsorption & Desorption Isotherms; Total Pore Volume; BET Specific Surface Area / Langmuir Specific Surface Area
Analysis / t-Plot Internal & External Surface Area, Micropore Area / DR Micropore Area; BJH Pore Size Distribution, Pore Area / HK/MP
Pore Size Distribution / BJH Pore Volume, αs Mesopore Volume, DR/t-Plot Micropore Volume
1.3 Analysis Stations: Up to 3 independent parallel sample analysis stations with individual control for each station
1.4 Saturation Vapor Pressure Test Station: 1 P₀ Station
1.5 Test Range: Specific Surface Area ≥0.0005 m²/g (Nitrogen: 0.01 m²/g); Pore Analysis: 0.35 nm–500 nm
1.6 Test Precision: Specific surface area repeatability ≤1%; Pore diameter repeat deviation ≤0.02 nm
1.7 Dewar Flask: 3.5L stainless steel Dewar flask, superior thermal insulation to glass and high durability
1.8 Adsorbate Gases: Isothermal adsorption experiments with Nitrogen (N₂), Krypton (Kr), Argon (Ar), Carbon Dioxide (CO₂), Hydrogen (H₂),
Carbon Monoxide (CO) and other gases
1.9 Optional Isothermal Adsorption Cell: Enables gas isothermal adsorption and desorption analysis at -25℃ ~100℃
1.10 Adsorption Temperature: Low-temperature nitrogen adsorption (77K), low-temperature krypton adsorption (87K), or other custom
isothermal adsorption temperatures
1.11 Pressure Control: P/P₀ partial pressure range adjustable down to 0.998; arbitrary test pressure range configurable
1.12 Vacuum Pump: Two-stage rotary vane vacuum pump, ultimate vacuum 10⁻² Pa, brand optional

2. Technical Advantages
2.1 Temperature Difference Dynamic Calibration: Eliminates the impact of liquid nitrogen volatilization on quantification. It calibrates pressure fluctuations induced by temperature changes by measuring thermal expansion coefficients, effectively improving instrument test
accuracy and stability, and compatible with coolants of different temperatures.
2.2 PFC High-precision Pressure Electronic Control System (Patented): Software-controlled gas inlet/outlet rate and volume
2.3 Intelligent Judgment of Adsorption-Desorption Equilibrium: Multiple equilibrium criteria optional
2.4 One-click selection of analysis modes and template calling to meet diverse user requirements
3. Intelligent Sample Degassing Station (Patented)
3.1 Sample Preparation Quantity: 3 stations as standard
3.2 Vacuum Pump: Two-stage rotary vane vacuum pump, ultimate vacuum 10⁻² Pa, brand optional
3.3 Temperature Control Range: RT ~400℃, isothermal heating furnace with temperature control accuracy of ±0.1℃
3.4 Intelligent Control: Dedicated degassing mode for ultra-light, high-moisture and ultra-fine powders; AI intelligent mode with no manual parameter setup required

4. Hardware System
4.1 Lifting & Positioning System: Arbitrary lifting height configurable via software to adapt to Dewar flasks of different specifications;
anti-collision protection function available
4.2 Pressure Detection System: Independent imported pressure sensors equipped for analysis stations and P₀ station (4 pcs). Real-time
pressure display of all sections and real-time saturation vapor pressure acquisition
4.3 Gas Path Control System: 316L modular assembled gas circuit, low leakage rate and convenient maintenance
4.4 Data Acquisition System: High-precision 32-bit electronic circuit acquisition & control system featuring high acquisition precision, fast
transmission and long-term stability; supports data storage upon unexpected power failure
4.5 Output Interface: USB

5. Instrument Specifications
Main Unit Dimensions: 560mm (L) × 430mm (W) × 800mm (H); Total Power: 1200W (main unit & vacuum pumps); Operating Voltage:
220V
Advanced Control Software with Powerful Functions
◆ Visual display and setting windows, aligned with modern user requirements for optimized operating experience
◆ Automatic saving to prevent data loss
◆ Automatic judgment of adsorption/desorption equilibrium based on sample adsorption characteristics
◆ One-click automatic leak detection and calibration
◆ Automatic pop-up alerts upon faults to assist users with rapid troubleshooting