Burglar alarms have become things of common place in almost all super stores and business set ups. Private homes are not left out too far behind. Advancements in technologies and competition in the market have brought down the rates to around $10 for a basic alarm system.
How Does Burglar Alarms Work
Wired alarms are almost extinct. Wireless burglar alarms operate by either of the two means, today.
1.Connected by radio frequency
2.Connected by infra red light rays
Wired systems required power to operate continuously unlike the wireless alarms which run on battery power. There is the third type, which combines the features of the earlier two and is known as hybrid alarm.
Burglar alarms operate on simple principles. When their connection or circuit cuts, they get triggered. When intruders pass between two sensors or a door opens it is detected by their cut circuit.
Normally there are 2 types of circuits; open circuit systems and closed circuit systems. Let us not get into jargons and clich words; closed circuit operates when the door is closed as electricity begins to flow. But when interrupted by opening doors, circuit also opens...
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