Patent of Invention

Accurate adsorption measurements based on sharp peak detection eliminate errors caused by incomplete desorption. Ideal for low surface area samples such as ternary materials and battery electrode materials. (Patent No. 20140320453.2)

Automatic Nitrogen Partial Pressure Control

Surface DX 400 is equipped with high-precision mass flow controllers to automatically regulate nitrogen partial pressure during BET surface area measurements. This ensures stable and accurate gas flow across the sample surface, delivering consistent and reliable adsorption results with minimal manual intervention.

Four Parallel Operating Analysis Stations

Run up to four samples at once with independently controlled stations. Achieve unmatched throughput with consistent test conditions and result repeatability better than ±1.0%.

Anti-Elutriation Technology

A built-in anti-contamination unit prevents sample particles from entering the instrument’s internal gas line, ensuring operational reliability and long-term cleanliness.

Optional Sample Preparation Unit

External sample preparation device with four-degas stations can remove adsorbed contaminants from surface and pores of samples with heating in flowing gas/vacuum. Temperature can be set and controlled from ambient to 400 ºC.

Low Form Dewar flask

Long lasting, high volume (1 L) Dewar flasks assure a constant thermal profile along the length of sample tubes during experiment.

Fast, Sensitive Testing

Adsorption peak looks sharp, no trailing phenomenon, the change of nitrogen concentration caused by each sample adsorption is not diluted at all; the sensitivity of the sample test is greatly improved. The test efficiency is greatly improved under the condition of sufficient adsorption and the comparative test of four samples in one time only needs about 15 minutes.