AUTOCALL A4098-9755 (New, unused device):

Addressable Duct Sensor Housings with TrueAlarm Photoelectric Sensor; Available with Multiple Relay Control. Compact air duct sensor housing with clear cover to monitor for the presence of smoke. Includes factory installed TrueAlarm photoelectric smoke sensor and features: Individual sensor information processed by the host control panel to determine sensor status, digital transmission of analog sensor values via IDNet, 2-wire communications, and programmable sensitivity, consistent accuracy, environmental compensation, status testing, and monitoring of sensor dirt accumulation. Basic duct sensor housing (no relay output) powered by IDNet communications).