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There are sensors that detect movement, or a change in light, or temperature. Below is a list of some that could be used.
Mercury Tilt Switch- This is placed inside a device, and if that device is moved or tilted in any way it causes a blob of mercury to complete a circuit by touching contacts. This is often used in vending machines, or machines that contain money or goods that might cause people to tilt the machine to attempt to get the goods out. In the Peterson’s home this type of sensor could be used on doors or windows to detect whether they are opened.
Light Sensor - This is a sensor that can detect a change in lighting levels. These types of sensors are often used with streetlights, and detect when it is dark enough for the streetlights to be turned on. This could also be used for a security light outside the Peterson’s house, which will switch on when it is dark.
Push Sensor -These sensors create a circuit, which can turn on a light. These are often used on car or fridge doors, switching a light on when the door is opened.
Temperature Sensor - A sensor that detects a change in temperature, they are often used to within central heating systems to help in keeping the temperature of a house constant. This could be used to detect a fire, as there will be a rise of temperature in the event of a fire. Sound Sensor Used to record the level of sound, usually from places where loud music is being played.
Proximity Sensor - These sensors are made in two halves, and a signal is activated if the two halves are moved away from one another. They are often seen on windows. The Peterson’s could use sensors like these to activate a signal if their windows are opened when the alarm is set, as this could indicate somebody trying to get in.
Basic Security System
This basic security system is designed for somebody that simply wants and needs a basic level of protection, and/or may be unable to afford a costly top of the...