Myths about wireless alarms
Here are some of the top myths floating around out there about wireless alarms that just aren’t true:
- Wireless alarms are easier to breach
- Wireless alarms emit radiations
- Wireless alarms give false alarms
Are wireless alarms easier to breach?
Indeed in the past a wireless alarms were easier to be breached. However, today, if modern wireless systems meet the global standards there will be no such problems. The technologies used to protect the communications of the central unit of the alarm with the subunits (sensors) are the following:
- Automatic Frequency change of mode, in case of noise detection or of interference in the specific frequency.
- Encryption of the wireless transition data
- Coding signal transmission error correction
- Detection of intentional or random electromagnetic interference and immediate communication with the owner
These technologies make the communication of the sensors with the central unit so safe that in some occasions the wireless system is considered to be superior to a wired system with accessible wires which can be tampered with short-circuit.
Does wireless alarm emit radiation?
It is generally believed that our environment is critically endangered by strong electromagnetic radiation. Radio and Television stations, mobile phones, radios, satellite broadcastings, wireless networks, all emit electromagnetic radiation in our space. The emissions of a wireless alarm are extremely small compared to the previously mentioned factors, because of 3 reasons.
- The units of a wireless alarm broadcast only when the alarm rings and when the system performs a damage scanning process.
- The broadcasting is very short in order to preserve the batteries
- The broadcasting has zero intensity. Think that the units of the wireless alarm’s range is as big as your house whereas the range of a mobile phone is capable of the reaching the closest mobile antenna – which is usually km away-
Do wireless alarms give false alarms?
A false alarm has four causes in both wireless and wired alarm systems.
- Bad sensors quality: In this case you get what you paid. Thus, the alarm system and the sensors must have:
- Written guarantee form,
- Valid CE mark on the package and the manuals
- Clear reference to the specifications EN which fulfill and have been adopted for the security systems of the European Union
- Bad sensors installation: Sometimes, a sensor of quality can give false alarm due to bad installation. Example of this is the false installation of fire detection systems close to the kitchen’s oven.
The installation of every sensor must follow some rules. For that reason, the installation of an alarm system must be performed by experienced installers.
- Random Facts: It has been noticed that random facts, such a big insect on a sensor may be the cause of a false alarm. Cases like that, however, are rare.
- User’s mistakes: There were many occasions in which the alarm was activated due to a mistake of the owner or of someone of his close environment. In those cases the owner must be notified immediately in case the alarm is false and be able to terminate the alarm remotely from a distance in case he is not around. For that reason, the alarm must have user communication units, either through the house telephone, or through a mobile phone unit embedded in the alarm system. As a matter of fact, the owner of an alarm system must be notified by the system and also have the possibility to arm and disarm it from a distance without risking the safety of his protections codes.
- After an alarm, do not panic!
A way to avoid a false alarm is to wait for a confirmation of the alarm from the second sensor. Both the installation and its communications capabilities must be in a way that will result to 2 analytical alarm messages in case of a real breach. For example, if a house is breached from the window, the window sensor must activated as long as the motion detector in the room. The communication system of the alarm must notify the user about all the different facts. There are 2 options. First, via the home telephone, where this will notify the signal receiving center or the owner with a voice message. The second option is to notify the owner directly with an SMS about the status of every sensor.