Due to the increasing number of scams and robberies of houses and apartments, surveillance, warning and alarm systems are used are more frequently.
Camera resolution.
Video surveillance cameras – are analog, not digital. Therefore we are not talking about pixels (dots on a vertical or horizontal), and we will talk about TVL (TV lines). TVL – is the number of lines, which gives the camera horizontally or vertically.
Absolutely all the cameras give 625 horizontal lines. This is due to the standard of television signal, due to which we watch TV. Since all the cameras give 625 horizontal lines, then this option in the characteristics of the camera is not specified.
Number of lines in vertical resolution – is the main characteristic of the resolution of the camera, for example, 420 TVL or 380 TVL. There are also cameras at 600 TVL. Accordingly, the higher the TVL, the higher the resolution and the more fine details we can see.
Video cameras with a resolution of 600 TV lines are mainly used for connecting to microscopes, gastroscopes and other medical and scientific equipment. For example, we watch TV with 400 TV lines – it is determined by the standard of television broadcasting. Cameras with a resolution of 420 TVL are almost always enough. Color cameras usually have smaller TV lines.
Alarm systems.
Alarm systems are designed to ensure the safety of your property. They protect against both malicious attacks (burglar alarm) and from imprudent actions that may lead to fire (fire alarm). Modern signaling systems combine modules of fire protection and security, thereby realizing the functions of fire alarm. The alarm system includes alarm control unit and various sensors. By way of warning the alarm system can be attributed to the local area – the alarm is displayed on the siren, with the output on the panel – the alarm is displayed on the console of security structure and / or fire station, with connection via the GSM (gsm alarm system) – alarm signal is sent to the mobile phone of owner. Depending on the connected sensors and implemented features, they distinguish such types of alarm systems:
Fire alarm.
Unlike security alarm, fire alarm system is designed to warn about fire. It is composed of temperature sensors and smoke.
Security fire alarm.
As the name implies, security fire alarm system combines the functions of protection against attackers with the functions of prevention of fire. Intrusion fire alarm systems may be additionally equipped with sensors of flooding, thus additionally protecting your property.
Warning systems, application and description.
The system of public notification in emergency situations is designed to send emergency messages in case of accidents, man-made and natural disasters, as well as the use of weapons of mass destruction.
When an emergency occurs, information about it comes to the command center of civil defense. Operational duty primarily includes pre-arranged signal “Attention”. This signal is transmitted through special detectors installed in all areas of the city and represents a sound of one tone siren (signal of “air-raid warning”). Then on the radio and television stations they begin broadcasting pre-recorded message about the current situation, if necessary, it is provided guidance about actions that citizens should take in the moment.
Practically every home owner thinks that his house is his castle. That’s why it comes as no surprise that home has to be protected as much as possible. For those living in Philadelphia, Philadelphia home alarms would be of great help.
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