Some of the analog systems can be converted into an intelligent system with virtually unlimited possibilities and applications when they are combined with a modest microprocessor. Addressable analog detector is a classic example of analog devices in this category. We can use a manual addressable analog detector here. There exists some more variety of addressable analog detectors where any one of the following physical principles involved-ionization effect, photo electric effect, flame effect and thermal effect. The detectors are working as sensors and do not generally initiate alarm. The control panel which includes a microprocessor analyzes the digital information received from addressable analog detectors and kicks off the alarm signal.
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