Cameras provide a video feed from their installed positions in and around a protected premises. The viewer can watch events happen in real time over a live stream, or they can watch recordings from days, weeks and months past, depending on the size of the storage drive where footage is kept.
Camera systems are employed to combat a range of a threats, from theft to fire, in addition to monitoring the behaviour and movements of employees and customers. Because their applications are so diverse, cameras come in many different forms, from the basic fixed lens cameras of a typical residential installation, to specialty commercial types that can detect the early onset of fire in a warehouse, heat map the movement of customers in a retail store, or even spy on people up to a mile away.
The main benefits of a camera system are (1) the ability to record video and audio footage that may be used as evidence of a crime, and (2) the ability to catch or deter criminals in real time by being able to discreetly oversee their behaviour from afar.
For a home owner, this means you no longer have to leave the relative safety of your house in order to see why the dog is barking at 2 am; you can instantly have eyes on the front, back and sides around the outer perimeter of your house through an app on your phone, a connected TV, or a dedicated surveillance monitor; additionally, with the aid of remote viewing, you can log in and view the cameras whenever you are not at home.
Camera systems typically comprise:
- Cameras; often 1 – 4 megapixel resolution, 2.8 – 3.6 mm fixed lens with ~90 – 100° viewing angle, either analogue (TVI / CVI) or internet protocol (IP).
- Video Recorder; either standard digital (DVR) or network (NVR) with a 1 – 10 terabyte (TB) hard-drive.
- Monitor; either dedicated VGA/HDMI, TV through HDMI, and/or smartphone app.
- Uninterruptible Power Supply (UPS) to provide battery backup and surge protection in case of mains disruption.