System Sensor 4WTAR-B — conventional 4-wire i3 series photoelectric smoke detector combining a 135°F fixed thermal sensor, an 85 dBA sounder and a Form C relay in one plug-in head, supplied with its mounting base.
The 4WTAR-B is the sounder-plus-relay member of the i3 sounder/relay family. Smoke or heat puts the head into alarm, the integ