Drawell Analytical at Shenzhen Exhibition

We are excited to announce that Drawell Analytical will be showcasing our latest advancements in laboratory equipment at the upcoming Shenzhen Exhibition. Among our top-tier products is the biosafety cabinet, an essential tool for laboratories working with potentially hazardous pathogens. Our laminar flow cabinet features an enclosed, ventilated workspace designed to ensure maximum safety for both researchers and the environment. Equipped with safety laminated glass, electrical sockets, and valves, it is engineered to meet the stringent requirements of any laboratory setting.

The microprocessor system with an LCD digital display makes operating and monitoring the cabinet air velocity seamless and efficient. Contaminated air is meticulously managed through HEPA filters and a robust blower system. Dirty room air is drawn into the front of the cabinet, where it mixes with contaminated air from within. This contaminated air is then pushed below the work surface, moving through the plenum located on the back side and rising up to the blower, ensuring a clean and safe working environment.

One of the key features of our biosafety cabinet is the efficient HEPA filtration system. Contaminated air is pushed through these filters by the cabinet's blower motor, with 30% of the filtered air recirculating into the room or being removed by canopy exhaust, and 70% entering the cabinet from above. This air flows down onto the work surfaces under unidirectional flow, which is crucial for preventing cross-contamination between samples. The laminar flow ensures that the air supply inside the chamber is evenly distributed around the work surface.

The air supply inside the chamber also provides an essential protective air curtain on the front space of the biosafety cabinet, which not only protects the samples but also ensures the safety of the researcher. This comprehensive protection mechanism supports three critical aspects: researcher safety, sample integrity, and environmental safety. For more details on our advanced biosafety cabinets, visit our product page.

We invite all attendees of the Shenzhen Exhibition to visit our booth and witness firsthand the high standards of safety and efficiency that Drawell Analytical brings to the table. Our team of experts will be on hand to provide detailed demonstrations and answer any questions you might have about our products, including the innovative biosafety cabinet. Don't miss this opportunity to explore our range of laboratory solutions and discover how we can help enhance your laboratory's performance and safety.


Differences Between Laminar Flow Cabinet and Biosafety Cabinet from Drawell Analytical

Both laminar flow cabinets and biosafety cabinets are commonly used in microbiology labs and cell culture facilities. While they serve similar purposes of maintaining sterile workspaces, there are important distinctions between these two containment systems.

Laminar Flow Cabinet

A laminar flow cabinet, also known as a biosafety enclosure, uses HEPA filtration to generate laminar, particle-free airflow over the work surface. This maintains aseptic conditions within the cabinet.

Design and Airflow

Drawell offers vertical and horizontal laminar flow hood. Vertical models have a downward unidirectional airflow while horizontal cabinets provide lateral airflow towards the operator.

In both designs, air enters through pre-filters before passing through HEPA filters rated at 99.97% efficiency for particles 0.3 microns or larger. The purified air exits uniformly over the work area, protecting samples from external contamination.


Laminar flow cabinets are suitable for cell culture, handling non-pathogenic microbes, assembling sterile medical devices, and other aseptic processes that don't require full operator or environmental protection.

Common industries adopting laminar flow cabinets include pharmaceuticals, biotechnology, healthcare, cosmetics, and food production. Drawell models support workloads from research labs up to FDA-compliant manufacturing suites.

Advantages and Limitations

Key benefits include maintaining a consistent, ultra-clean working environment. However, laminar flow cabinets do not fully isolate users or the immediate workspace from surrounding unfiltered air.

Biosafety Cabinet

Biosafety cabinets provide graduated containment for hazardous biological agents or toxins handled in research and healthcare facilities, protecting users, samples and the environment.

Classification System

Biosafety cabinets are classified according to their protective capabilities into Classes I, II and III. Higher classes indicate stronger isolation of the hazard from personnel and surrounding areas.

Class II Biosafety Cabinet

Class II cabinets provide product, personnel and environmental protection. 70% of HEPA-filtered air is discharged over the work area while 30% exits through an exhaust plenum before double filtration.

Types A1, A2, B1 and B2 denote design variations in the exhaust handling system and captured airflow percentages.

Class III Biosafety Cabinet

Offering the highest level of containment, Class III cabinets operate as fully enclosed, negative pressure gloveboxes. All air passes through HEPA filtration before accessing the operator's gloves.


Biosafety cabinets see extensive adoption in pharmaceutical R&D, infectious disease research, hospitals and reference labs for handling biohazard risk groups 2 and higher agents requiring high-security containment.

Key Benefits and Considerations

Biosafety cabinets isolate workers, surrounding areas and samples from hazardous materials. However, they tend to have higher installation and operational costs than laminar flow cabinets.

Selection Factors

Choosing between laminar flow cabinets and biosafety cabinets comes down to the intended application, required specimen or personnel protection levels, containment standards and equipment budget.

Drawell's product ranges include models suited for cell culture, microbiology, teaching labs, biomanufacturing cleanrooms and high-security containment facilities conducting the most advanced life science research.

Drawell Support Services

Drawell experts can assist with cabinet selection based on intended use, local regulations and facility requirements. Comprehensive services include technical support, ongoing preventive maintenance contracts, validation and re-certification.

An authorized service team provides on-site repair and parts replacement to minimize downtime. Remote diagnostics help troubleshoot issues without risk of contamination.


In summary, laminar flow cabinets and biosafety cabinets both serve to maintain aseptic work environments, but their differing design principles and containment capabilities make one type more suitable than the other depending on the specific application parameters and safety needs.

Drawell offers a broad selection of these containment solutions along with expert guidance to identify the best-fit model. Contact us to discuss your research or manufacturing needs.

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