AU-550

• Digital display of airflow velocity
• Audible and visual alarms for low airflow and hydrocarbon breakthrough
• Filter saturation alarms
• Sensor that adjusts blower speed to maintain air velocity
• Display of filter type
• Time tracking of filter use
• Safety filter to prevent chemical breakthrough even after main filters are completely saturated

All units consist of powder coated aluminum head and base section with fluorescent lighting, chemically resistant acrylic panels, removable fiberglass spill tray and an electrostatically charged pre-filter.

"L" models are for customers who do not require the added features of the Advanced Filter Monitoring System. This lower cost version is recommended for use with powders and acids which are not detected by the hydrocarbon sensor. The "L" model features visual alarms to notify users of low airflow conditions. Each unit is equipped with a test port for manual filter saturation testing. Gas detection tubes and pumps are available from several laboratory safety distributors.