Are plug-in type smoke sensors that combine a photoelectronic sensing chamber with addressableanalog communications. The sensors transmit an analog representation of smoke density over a communication line to a control panel. Rotary decade switches are provided for setting the sensor’s address. Two LEDs on the sensor are controlled by the panel to indicate sensor status. An output is provided for connection to an optional remote LED annunciator (P/N RA400Z). Models IDP-Acclimate and IDP-Photo-T combines a photoelectronic sensing chamber and 135°F
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