Monitoring kit regulates airflow of ac, dc fans

ORION FANS Airflow monitoring system is simple to implement and use. The field retrofittable AFM Kit includes an AFM-01NC airflow module, mounting clip, three plastic guards (80mm, 92mm, and 120mm), buzzer, LED and holder, switch and wall mounted power supply. Kit comes completely assembled in a 10′ wire assembly, making installation even easier. Product operates an optical LED and/or audible alarm, which can be controlled with included switch, when airflow falls below 8.2ft/s due to fan filter clogs, foreign objects coming in contact with the fan blade, or fan failure. http://www.orionfans.com