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 cliché words; closed circuit operates when the door is closed as electricity begins to flow. But when interrupted by opening doors, circuit also opens and the alarm goes off. And it is the exact reverse of this in open circuit alarms. The siren is triggered when doors are closed.

Closed circuit alarms are first choice for front doors for the fear of wiring being cut by burglars.

How does a sensor work, after all? In a wired system, a magnet pulls the spring loaded switch to close circuit when door is closed. When the door opens, spring retracts causing the circuit to break and triggering the alarm. The principle is same for wireless infrared system too. In place of magnets and wires, there are infrared sensors and emitters. If sensors don’t sense infrared light for reasons like opened door or other obstructions, the circuit is broken. AG-Security Home Security System Professional Wireless GSM Remote Control Intelligent LED Display Voice Prompt Wireless Burglar Alarm House Business Auto Dial Outdoor Siren

Burglar Alarms are also useful in protecting cars. FM radio based car alarms are getting popular because of their simplicity. They have a two part system: a transmitter, fitted to the car and a receiver which can be out side the car (home or office). The receiver makes noise when burglars move the car a few meters out of your porch. If the wireless alarm (transmitter) is disconnected from battery, remote alarm still remains activated because the receiver still continues to make noise. So this type of burglar alarm is highly reliable.

While installing, ensure you follow specified codes by insurance companies or certify it by third parties like Underwriters’ Laboratory etc. After all, you need someone even after burglar alarms are breached.

A wireless burglar alarm is classified into two types — the bells-only and the wireless security system that was tracked. The bells-only alarm gives out loud alarm sounds to alert you and your neighbors in case of an intrusion. They work primarily to scare robbers and burglars away or provide you with time to phone the police yourself. On the flip side, the tracked alarm apparatus, which are connected to your phone, automatically dials a number you set when an intruder attempts to open enter your home. You may program them to telephone law enforcement, the home phone of trustworthy friends, or your cell phone.

Wireless security alarm systems are ideal for installation in a home that wasn’t wired for an alarm system when it was built. Motion sensors, door contacts and window contacts can all be wireless, and not need to be hardwired back to the main control panel. Even the control keypad can be wireless.

The various wireless components use RF (radio waves) to transmit their signals back to the main control panel. The only real disadvantage compared to wired systems is that the wireless components run on batteries, which will need to be replaced once in a while.

These batteries generally last for years, however, and many alarm companies offer service and maintenance plans that will cover the replacement batteries and the installation of them.

The most common wireless alarm components are the following:

Control Panel

This is essentially the “brains” of the alarm system. It’s usually mounted somewhere out of the way, like a closet or the basement. It monitors the signals from all the wireless components, and triggers the alarm (and a call to the monitoring station if the system is monitored) if any of the sensors detect an intrusion.


The keypad is used to arm and disarm the system, as well as change various settings. It’s usually located somewhere near the entrance door for easy access.

Magnetic Switches

These contacts are used to monitor windows and doors. They’re made up of a switch that attaches to the window or door and a magnet that is mounted on the frame. If the switch and magnet are separated (the window or door is opened or broken) it will trigger the alarm.

Motion Sensors

Motion sensors can be mounted in large rooms or areas like hallways. They will detect motion – and in some cases body heat – and trigger the alarm if it is out of the acceptable range.

Video Cameras

Wireless security cameras can send a video feed back to a monitor and/or a VCR in the house. They can be used to monitor outside areas that are not very visible from the street, as well as a way of seeing who is at the door before opening it.

Remote Keys

Remote keys are much like the remotes you get with car alarms. They can be used from a distance to arm or disarm the alarm, as well as things like turning lights on or off or unlocking doors. DIGOO Wireless Home and Business Security Alarm System, With Auto Dial and APP Control Function, Come with PIR Detector, Doorbell Button, Door Window Sensor, and Remote Controller(Model:DG-HOSA)

You should purchase a wireless burglar alarm. It might be a bit expensive however the advantage it will bring you is lasting. After all, security and comfort usually than not, precede cash and everything else.