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Smoke Detectors 2-Wire Fire Alarm Systems

2 Wire Smoke Detectors 2-Wire conventional smoke circuits use a pair of wires for both power and signalling functions. On 2-wire circuits, the detectors are wired in parallel along a single path with an EOL resistor at the end of the circuit. When any detector goes into alarm, the circuit is brought to a near short. The panel senses the change and goes into alarm.

2-Wire systems can often show a cost saving on installation due to the reduction in cabling.

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    Fike Twinflex Multipoint Combined Detector

    Fike

    Fike Twinflex Multipoint Combined Detector. The Twinflex Multipoint is an advanced detector that incorporates multi-criteria detector, with advance...

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    £25.32
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  • Apollo 55000-390APO AlarmSense Optical Smoke Detector - SD Fire Alarms
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    Apollo 55000-390APO AlarmSense Optical Smoke Detector

    Apollo

    AlarmSense is a range of conventional fire detection and alarm products designed to be connected to the same pair of supply wires, making installat...

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    £13.50
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    Apollo AlarmSense Integrating Optical Smoke Detector 55000-391APO

    Apollo

    The AlarmSense Optical Smoke Detector works using the light scatter principle. The detector also has the ability to monitor and discard transient s...

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    £18.50
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  • Original price
    £39.81
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    204-0003 Fike Twinflex Multipoint ASD Detector without Sounder

    Fike

    The TWINFLEX two-wire Multipoint detector can be set to any one of 3 smoke modes, 3 heat modes as well as a Combined Mode (Smoke 2 and Heat 2) wher...

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    £39.81
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    Apollo AlarmSense Integrating Optical Smoke Detector Inc Sounder 55000-393APO

    Apollo

    The AlarmSense Optical Smoke Detector works using the light scatter principle. The detector also has the ability to monitor and discard transient s...

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    Original price
    £28.03
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    Apollo AlarmSense 2-Wire Optical Smoke Detector Inc Sounder Base 55000-392

    Apollo

    The AlarmSense Optical Smoke Detector works using the light scatter principle. The detector changes to alarm state at a pre-set threshold of smoke ...

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