A Class II A2 biological safety cabinet with 100% filterable air using a HEPA filter, designed for basic cell biology, microbiology, biomedicine, biosafety laboratories, and other laboratory environments requiring triple protection for the operator, product, and environment. The model features a single exhaust HEPA filter and a main HEPA or ULPA filter, with a 70% downflow and 30% exhaust airflow pattern, 100% of the work area ISO Class 3 for HR1200-IIA2 and ISO Class 4 for HR900-IIA2, and operation with low-noise, low-power DC/EC fans.

The Class II A2 cabinet can connect to an external exhaust unit via an optional rear-bottom exhaust port, enabling use with low-level volatile chemicals and trace nuclides in addition to moderately hazardous biological agents. Airflow receives pre-filtration treatment before reaching the HEPA filters, extending their service life. The airflow is automatically regulated by the control system to maintain safety conditions even with flow variation or partial filter saturation, with audible and visual alarm if operating parameters deviate.

The work surface can be removed for cleaning and disinfection, and the tempered glass door can be manually adjusted to different working positions or subjected to programmable automatic sterilization cycles. The UV light is set via a single operation key, with a programmable sterilization interval from 0 to 24 hours, allowing cycle adjustment to match the work routine and reducing downtime. An interlock between the UV lamp, illumination lamp, front window, and fan motor ensures the UV light can only turn on when the illumination lamp is off, preventing incorrect operation.

The DC/EC fans operate with lower noise and better airflow uniformity, consuming less power. The LCD display shows operating parameters, filter lifetimes, and alarm status. Audible and visual alarms include hardware malfunction, parameter overrun, end-of-life alerts for filters and UV lamps, and more. Two IP44 waterproof sockets with timed on/off function improve safety and energy conservation.

Key Features

• Class II A2 with triple protection: operator, product, and environment.

• 100% of work area ISO Class 3 on HR1200-IIA2 and ISO Class 4 on HR900-IIA2.

• Airflow pattern: 70% downflow and 30% exhaust.

• Pre-ready exhaust connection port for optional external exhaust.

• Single HEPA exhaust filter and main filter HEPA or ULPA.

• Low-noise, low-energy DC/EC fans.

• Automatic airflow control with audible and visual alarm for incidents.

• Removable work surface for cleaning and disinfection.

• Tempered glass door with programmable, automatic sterilization.

• Perfusion cavity for peristaltic pump.

• Programmable UV lamp, 0–24 hours, with automatic on/off timing.

• Interlock between UV, illumination, front window, and fan motor.

• Audible and visual alarms: hardware fault, parameter overrun, end-of-life filter and UV alert.

• Two IP44 waterproof sockets with timed on/off function.

• Optional accessories: water valve (manual/electric), air valve, VHP sterilizer, electric door, and electric underframe.

• Reference model presented: HR900-IIA2 (with HR900-IIA2-S and HR1200-IIA2-S specifications in the table).

Applications

The Class II A2 biological safety cabinet with a single HEPA exhaust filter is suitable for basic microbiology, cell biology, biomedicine, and biosafety laboratories that require triple protection but aim to reduce initial cost and maintenance by using only one exhaust filter.