System Sensor APB200

Description

APB200 System Sensor AP Series Intelligent Sounder Base The APB200 System Sensor is a low-frequency sounder base, Designed to meet the NFPA 72 sleeping space requirement to produce a fundamental frequency of 520 Hz +/ 10% with a square wave or its equivalent. Studies show that a lower frequency, centered around 520 Hz, is the most ideal to awaken sleeping occupants, even those with mild to severe hearing loss.