Some people believe that locking doors and windows at home is an adequate protection for intruders; This is not the case. Some people may be lucky that their house never broke in, but would you be willing to take the risk? Motion detectors are a way to protect your home from intruders. They work in different ways, and some detectors send out beams in a certain range. An alarm is issued once the light is broken. Other alarms use radar and the alarm will be triggered if the signal is reflected back. Motion sensor alarms work in a variety of ways, with a variety of products, you will be sure to pick a product that will make you feel safe at home. There are basically two types of motion sensor alarms-active or passive. The active motion sensor alarms by sending out an energy signal within a certain range. If someone or something is in the sensor range, the signal is reflected back and an alarm is issued. Passive Alarm sensors work by collecting energy within the range. Most of the motion sensor devices that protect the home are passive alarm sensors. For normal operation, the passive alarm sensor must be able to read the body temperature correctly. The wireless motion sensor alarm detects body temperature. When something is in range, it signals and alerts the control panel. Other motion sensor alarms with photo-taking ability; These alarms are mainly used in public places such as shopping malls and casinos. Most motion sensor alarms are weatherproof, so they can be used both indoors and outdoors. There are various styles of motion detectors, and the price range of each detector is different. The cheap detector costs twenty dollars. The more expensive one can cost more than $200. The included function can be to call pre- Program number, I. e. The police are triggered when someone else calls a number and leaves amessage to inform someone that has just broken into your home. Most detectors can turn the alarm on or off with remote control. Others have a microphone with them and can let you listen in other rooms if the alarm has already sounded. To save money, some people choose to install their own motion alarm sensors. However, if there is an intruder, improper installation may cause the device to not work, or the alarm will always be triggered even if there is no intruder. It is best to have the unit installed by a professional to ensure it is working properly. The probe should be placed in an area where the intruder must go through, such as a staircase in the corridor. They should not be placed where they are directly exposed to heat, or where the sun can shine on them for a long time. Professionals will be able to install them in place to avoid damage. No matter what kind of motion detector you buy for your home, you will be fully protected as long as the detector is properly installed. If someone is too close to your property, the detectors can be programmed to start the apartment alarm system, or they can start the alarm if your home is broken in. Using an alarm sensor to protect your home is a huge investment because knowing that your house will be protected will give you peace of mind.