Biosafety Cabinets and Clean benches: Unmistakable "Clean" Equipment

In the lab, biological safety cabinets and clean benches may look similar and are often confused, but their design purposes and protective targets are fundamentally different, and misuse can pose significant risks.

The core function of a biosafety cabinet is "safety."It offers bidirectional protection. On one hand, it securely locks the aerosols generated during operation within the cabinet using inward airflow and a HEPA filtration exhaust system, preventing them from harming the operator and contaminating the environment. On the other hand, the vertically blowing laminar airflow it emits is clean, also safeguarding the experimental samples from contamination. It is primarily used for handling materials with biological hazards.

The core function of the clean bench is "cleanliness."It offers one-way protection. By blowing vertically or horizontally laminar air that has been filtered through a HEPA system into the operational area, it creates a sterile, dust-free clean environment, with the aim of safeguarding experimental samples (such as cells, culture media) from contamination. However, it does not protect the operator, as the airflow is directed towards the operator directly. If there are biohazardous operations within, the aerosols would be blown directly in front of the operator, posing an exposure risk.

In summary, use safety cabinets to protect personnel, and use ultra-clean benches to safeguard samples. Clearly distinguishing between the two is a fundamental prerequisite for laboratory safety and experimental success.