| Disaster and security alarms are not new to many | | | | might differ depending on the design and prerogative |
| people. These equipments are already available and | | | | of the manufacturer. Detector zones can also be |
| are being continuously innovated. | | | | programmed in control panel so that when the |
| These warning instruments are found usually in | | | | detector gets unusual frequencies, the brain accesses |
| business firms. The reason for installing these devices | | | | it and make the alarm sound. The control panel also |
| is for safety of properties against disasters like fire | | | | has a memory chip which can store the user settings. |
| and attempted burglary | | | | It'll be present in the product's brochure or in the |
| Jewellery shops and Banks are examples where high | | | | user's manual. |
| security is needed. By using these alarms security is | | | | Signalling Devices |
| obtained. In fact, their insurance companies force | | | | These alarms make sounds whenever there is need. |
| them to have the complex and the most effective | | | | It may use a bell, a chime or a buzzer. The alarm |
| burglar alarm that the firm could have. For higher | | | | that is used is loud enough such that it can cause |
| security the burglar alarm used must be more | | | | panic. Now-a-days, sounders are partnered with |
| complex. | | | | strobe which is a special lighting device. This consists |
| Burglar alarms which are installed in houses uses the | | | | of a lamp that is mounted such that it rotates when |
| alarm system's principle. Alarms can make sound | | | | the alarm sounds. Most common colours which are |
| when condition is met with, due to electrical flow. For | | | | used for strobes are yellow, red and blue. Telephone |
| instance, for close circuit alarm, while the doors open, | | | | relays or Speech diallers may also be part of this |
| the flow of current activates the alarm in contrary to | | | | equipment. |
| open circuit alarms which alarm when current is cut. | | | | Detectors |
| There are three main equipments in a burglar alarm. | | | | They are also known as sensors. These are used for |
| These are I) the control panel, ii) signalling device and | | | | reporting movements that are unusual to control |
| iii) detectors. These are interconnected to work as | | | | panel. These are of several types. Some commonly |
| needed. There are other systems which uses | | | | used detectors are: |
| infrared, radio frequency etc such that it connects | | | | • Magnetic Contact Detectors - it is usually |
| one part with another. Those systems which use | | | | mounted in doors and windows. These are mounted |
| radio receivers and transmitters are called the | | | | at the edge of windows and doors. |
| wireless systems. | | | | • Infrared Detectors (passive) - these are used to |
| Control Panel | | | | detect unusual irregularities or motions in the place. |
| It is the main processing unit of the system. That is | | | | These can detect smoke and temperature changes. |
| where one can program the system such that it | | | | • Vibration sensors - these are more sensitive |
| works according to the particular specifications of the | | | | than magnetic contact detectors since a small |
| building or home. You can reset, turn on or turn off | | | | vibration from door or window could be interpreted |
| the alarm system there. Control panel is accessed | | | | by it as unusual and trigger the control panel to alarm. |
| using keypad remotes. Specifications of control panel | | | | |