The Kidde Commercial AlarmLine II analogue detector uses sensor cable which is monitored by a dedicated control unit. Changes in the surrounding temperature cause changes in the characteristics of the sensor cable which activates the control unit at the programmed alarm temperature. The AlarmLine II analogue detector is a resettable line type heat detector whereby, providing that the cable has not been physically damaged, the system can be reset following an alarm condition. The AlarmLine II analogue detector can also provide an early warning through a programmable pre-alarm activation threshold. A pre-set range of programmable alarm and pre-alarm thresholds make configuration of the system quick and easy, with no difficult calculations or graphs required.

The AlarmLine II analogue detector allows for superior detection capability over many competitor sensor cables because it compensates for ambient temperature fluctuations. This feature not only ensures better and more accurate detection at the programmed alarm temperature, but also ensures smaller detection areas across the full cable length of up to 500m. The AlarmLine II analogue detector is available in two different ranges:  AlarmLine II analogue detector with international approvals, and AlarmLine II analogue detector EN with VdS approval.