Biological Safety Cabinet Technical Bulletins

Alnor Model 315 BSC/350 CEM NuAire Manual Supplement

The Alnor Model 315 BSC Low Airflow and 350 CEM Hi/Low Airflow Monitors can be used on several NuAire product models. When installing the airflow probe, refer to the standard NuAire methods below. In addition, be sure the airflow probe orientation has the probes oval tip opening in line with the airflow direction.

Charcoal Filtration

On NuAires (Class II, Type B2) Biological Safety Cabinets, the optional Lay-in charcoal Filter Module may be used inline with our exhaust transition flue hoods when venting to the outside, or alone when (Class II, Type A) units are vented into the room. The optional lay-in charcoal filter can be added on top of the exhaust HEPA filter on our Class II, Type B1 or B2 Biological Safety Cabinets, with a special exhaust filter housing.

Digital Manometer for Exhausting Containment Cabinets

The Digital Manometer Monitor uses an integrated digital pressure transducer to monitor exhaust system negative pressure. The monitor indicates through both a segment display and LEDs. The segment display is green and operates to + 0.01" w.g. sensitivity. The LEDs indicate acceptable pressure (green), caution or near alarm points to within 0.005" w.g. (yellow) or alarm condition (red).

Exhaust Transition (New Style) Inquiry

All NuAire, Biological Safety Cabinets (BSCs) are Class II, Type A2. When exhausted outside through a properly functioning canopy, thimble or air gap exhaust transition, the cabinets may be used for work with minute quantities of volatile toxic chemicals and tracer amounts of radionuclides required as an adjustment to microbiological studies.

Exhaust Transitions, Product Inquiry

NuAire, Biological Safety Cabinets (BSCs) may be exhausted outside through a properly functioning canopy, thimble or air gap exhaust transition. This allows the cabinets to be used for work with minute quantities of volatile toxic chemicals and tracer amounts of radionuclides required as an adjustment to microbiological studies.

Gas Tight Butterfly Valve Installation Instructions

NuAire air-tight butterfly valves can be installed using standard HVAC duct connection techniques. To assure a tight connection, NuAire recommends the use of silicon RTV.

Labgard NU-425/437/440/480E with Double Exhaust Filter Option

The NU-425E (Series 20), NU-437E, NU-440E and NU-480E with the double exhaust filter option requires additional HEPA filter integrity testing. The additional HEPA filter integrity test is performed by accessing the exhaust filter sample port located next to the D.O.P. challenge port in the top center of the cabinet.

NU-946B Airflow Monitor

The NuAire Airflow Monitor can be used for practically any application requiring the mass flow of an air stream to be monitored for minimum acceptable flow. A stable/repeatable response to airflow detection is achieved by using two thermistors: One that is self-heated and one that is measuring ambient. As air is passed over the thermistors the heated thermister is cooled, generating a difference in resistivity that translates into the flow rate. The second thermister provides the temperature compensated ambient reference.

NU-959 Portable UV Light Installation Instructions

The NuAire portable germicidal ultraviolet lamp is primarily intended for the destruction of bacteria and other microorganisms in the air or on directly exposed surfaces. Approximately 95% of the ultraviolet radiations from germicidal tubes are in the 253.7 manometer region. This is a region in the ultraviolet spectrum which is near the peak of germicidal effectiveness. The exposure necessary to kill bacteria is the product of time and intensity.

NU-976 Information Sheet

NuAire disposable forearm pads were specifically designed and tested for NuAire Biological Safety Cabinets. Please consult original equipment manufacturer for use on other than NuAire Biological Safety Cabinets. This bulletin describes how to install these pads on NuAire Biological Safety Cabinets.

NU-978-001 Elbow Rest Installation Instructions

The NuAire ergonomic elbow rest was specifically designed and tested for use on NuAire BSCs. The elbow rest is intended to be placed on the front grill of a Biological Saftey Cabinet. The legs have a centering pin for locating and locking into position on the front grill.

Potassium Permanganate Odoroxidant

Potassium Permanganate odoroxidant is a unique product for use in air purification. Consisting of activated alumina and potassium permanganate, Potassium Permanganate destroys odors and gas phase through the processes of absorption, adsorption, and chemical oxidation.

Canopy Versus Hard Connection Class II A1/A2 BSC

The topic of canopy versus hard connection of Class II, Type A2 Biological Safety Cabinet (BSCs) has long been a matter of discussion over the years. Safety professionals have interpreted the many revisions of both the NSF 49 standard and the CDC/NIH Biosafety in Microbiological and Biomedical Laboratories (BMBL) guidelines differently. This bulletin discusses the differences between these exhaust connections. when exhausting type A2 BSCs.

Use of Natural Gas or Bunsen Burner w/BSC

The use of natural gas for Bunsen burners in a microbiological laboratory has long been an accepted practice over the years. This practice has also carried over to use within a Biological Safety Cabinet (BSC). However, Bunsen burners within BSCs do present some inherent problems and are not needed or recommended unless deemed absolutely necessary.