Now the security alarm system is realised, as a rule, on the basis of infra-red (Ir) - the detectors providing fixing of the malefactor on thermal (Ir) to radiation. Modern Ir-detectors possess in the small sizes and aesthetic design.
The security alarm system on base Ir - detectors is necessarily equipped with the reserve accumulators providing power supplies at failures of the electric power. Powerful dynamic or siren will provide strong psychological influence on the malefactor.
If you build a country house we can equip with its system of the security (security-fire) alarm system. Thus it is important to have time to put conducting of chains of the alarm system (as well as chains electricians, a telephony) prior to the beginning of shtukaturno-painting and decorating. Chains of the security alarm system are spent by a special wire, with the automatic control of integrity and absence of short circuits.