Negative pressure laminar flow workbench, vertical flow workbench application scenarios (precisely distinguished)
1. Vertical flow ultra-clean workbench (positive pressure, only protecting samples, no safety protection) Applicable scenarios
It is only used for pure aseptic and dust-free operations without any biological risks, dust, or toxic aerosols. The main purpose is to protect the samples from environmental contamination.
Typical applications:
Preparation of common reagents, solution packaging, disassembling and organizing consumables
Conventional cell culture, passage (non-pathogenic cells)
Dust-free assembly and testing of electronic and optical devices
Routine aseptic testing of food and water quality (samples without pathogenic risk)
Dust-free weighing of traditional Chinese medicinal materials and common samples (without dust hazards)
Strictly prohibited use
No operations that may cause pollution, aerosols, dust, or pathogenic bacteria are allowed. Otherwise, contaminants will spill and pollute the room and endanger the operators.
II. Negative pressure laminar flow workbench (negative pressure, anti-leakage, protecting personnel + protecting the environment + protecting samples) Applicable scenarios
For operations with low microbial risks, dust, volatile substances, and aerosol contamination, the main purpose is to prevent the leakage of samples / contaminants and protect personnel and the laboratory environment.
Typical applications:
Pathogen sample processing, strain inoculation, colony picking
Pre-treatment before PCR nucleic acid testing, virus sample aliquoting
Toxic, irritating, and trace volatile reagent operations
Weighing powder medicines and powder raw materials (to prevent dust dispersion)
Medical aesthetics sampling, wound sample processing, infectious sample operations
Low-risk biological experiments, contamination sampling operations
Core difference summarized in one sentence:
Vertical flow: Protect samples, clean but not prevent leakage of contaminants, only perform safe and pollution-free operations.
Negative pressure laminar flow: Prevent leakage, protect personnel and environment, specifically perform clean operations with contamination / biological risks.