For applications that only require basic TrueAlarm features, the 4098-9757 QuickConnect2 sensor provides addressable analog sensing in a cost-effective compact package. The control panel monitors and maintains the selected sensitivity of the 4098-9757 as well as providing automatic compensation for environmental conditions such as dust, dirt, and component degradation, and TrueAlarm data capture for each sensor. QuickConnect2 Mounting. Wiring connections are made to a 4098-9788 base which provides a secure and quick connection for the 4098-9757 sensor. Sensor and communications electronics are contained in the 4098-9757 sensor assembly. Sensor Alarm and Trouble LED Indication. The control panel also determines when individual sensors need cleaning. Dirty sensors, or other sensor troubles, will automatically be annunciated at the control panel and that sensor’s LED will light steadily. In an alarm condition, the alarmed sensor’s LED will light steadily. (LED operation is controlled by the panel. During system alarm, a sensor LED that was lit to indicate trouble will return to pulsing to conserve communications power as long as it is not in alarm.)