Lab glove boxes are essential sealed workstations that create a controlled atmosphere, protecting sensitive materials from oxygen, moisture and contaminants. Their core principle is a closed-loop system isolating the internal environment from outside air.
Operation starts with atmosphere replacement: a vacuum pump evacuates air from the main chamber and antechamber, then high-purity inert gas (nitrogen or argon) fills it. This vacuum-purge cycle repeats 2-3 times to lower O₂/H₂O to below 100 ppm.
A closed-loop purification system maintains ultra-low contaminants (<1 ppm for high-end models): a fan circulates gas through columns—molecular sieves adsorb moisture, copper catalysts remove oxygen. An antechamber enables material transfer without contamination via the same vacuum-purge cycle.
Auxiliary systems include precision sensors, slight positive pressure (50–200 Pa) to prevent leaks, and column regeneration, ensuring stable, reliable operation for sensitive research.
