Holland Safety Equipment


HSE offers BSC alarms for NSF compliance

As you may have heard, changes are afoot in the world of bio-safety cabinet testing. As of April 15, 2016, direct-connected Type A cabinets or canopy- connected Type A cabinets will not be eligible for NSF field certification without a functioning airflow alarm, regardless of a customer’s request. (Click here to download memo from NSF)

Bio-safety Cabinet Monitor

Many of HSE’s customers who test and certify bio-safety cabinets have found the TEL AFA 500-BSC (right) to be an ideal solution for facilities that need to add an airflow alarm to an existing cabinet. Instead of the post-mounted SM6 airflow sensor used for TEL fume hood alarms, the AFA-500 BSC is connected to a velocity probe that is installed in the exhaust duct above the cabinet’s transition collar. HSE provides a 3-by-3-inch galvanized steel square mounting plate. The sensor works best when installed in the center of the duct with the sensor holes be positioned in the direction of the airflow.

In addition, a mounting box for the monitor panel is available at no extra cost.

The AFA 500-BSC utilizes a single-point, pushbutton calibration process. During calibration, the monitor takes an airflow sample and then sets its alarm point at a 20 percent reduction of the measured velocity.

As with all TEL products for HSE, many companies qualify for both the reseller and volume discounts, the latter of which starts with 10 units on a single order. Additional discounts are available for customers who pay with purchase order and/or bank funds.

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