System Sensor M500S Supervised Control Module P2WH-LF The S1209 smoke alarms are

The S1209 smoke alarms are ANSI/UL 217 and are warranted for one year from the date of purchase

The detector also features automatic drift compensation

System Sensor P2RL L-Series

and clean rooms

System Sensor M500S Supervised Control Module P2WH-LF The S1209 smoke alarms areSystem Sensor M500S Supervised Control Module that is designed for use in intelligent, two wire systems It is used to switch an external power supply, such as a DC power supply or an audio amplifier. The M500S provides supervised monitoring of wiring to load devices that require an external power supply to operate, such as horns, strobes, or bells. It is capable of Class A and Class B supervision.