Most conventional fire systems are designed to work with two pairs of wires per zone: one pair for detection devices such as smoke detectors, heat detectors and manual call points; the other for alarm devices such as bells, sounders or strobes. By using different voltage bands for quiescent and alarm states, AlarmSense® components can be connected to the same pair of supply wires.

• When powered and controlled by the CFP two-wire fire panel, this reliable technology takes all the complexity out of fire alarm system design, leading to quicker, less expensive and more flexible installation. Indeed, research shows an AlarmSense® two-wire system can achieve a 20-25% reduction of labour over a standard four wire conventional system.
• AlarmSense®devices are acceptable for BS 5839-1 and BS 5839-6 systems making them particularly useful for fire protection in Houses of Multiple Occupation (HMOs).