These enclosures are designed for precision containment/operator protection when compounding and powder weighing. They exceed OSHA, ANSI and all relevant international standards for vented enclosures designed to handle potent compounds with toxicity levels of Class 1, 2 and 3. Turbulence-free design provides a smooth transition of airflow into the enclosure. In addition to balances, these enclosures cam also house microscopes and robotic equipment.