System Sensor S241575 Category : System Sensor This unit is missing its mounting bracket. Brand System SensorModel S241575Manufacturer System SensorType Alarm (Strobe)
Simplex 2904-9103 Category : SimplexThis unit is a light, not a strobe. I’m pretty sure that 2904-9103 is the correct model number.
Simplex 4903-9101 Category : SimplexSince this is a ceiling-mount unit, it’s model number is probably different from 4903-9101, but I couldn’t figure out what...