Home security systems are made up of a varying number of devices depending upon what you need. As the homeowner it’s important that you understand how each of the pieces will work so you can utilize it properly in your own protection. In Salt Lake home security is important, and surveillance even more so because of the property crime rate. So, while we could take time to tell you about glass break sensors, and wireless carbon monoxide detectors, and motion sensors each of these elements to home security deserve their own inspecting eye and explanation. In this article we’re going to explain the basic parts of a home security camera system and what you should be looking for in your devices.
Complete Camera Systems
You can purchase cameras as part of a complete camera system, meaning cameras, wiring and DVR. These systems will utilize the three types of broadcasting for home surveillance:
- Analog: also known as your CCTV or closed circuit system these systems use a coax cable to transfer information back from the cameras and store it on the digital video recorder. These systems might be cheapest, but they’re also less versatile. Versions of Analog wireless systems are incredibly susceptible to disruption from other microwave and radio signals.
- Wireless IP: Utilizing the Internet these systems provide the versatility of wireless cameras and broadcast their feed back to a network video recorder (NVR). IP cameras are better than analog, but they’re also more expensive to install and maintain. And NVRs are limited in space for storage.
- HD-SDI: Newest design on the market these camera systems have incredible resolution quality for both live display and recording footage. While these systems provide an incredible surveillance, they also require huge amounts of storage.
Field of View
The lens of the camera sees what we call a “frame”. The frame maybe so many feet wide by so many feet high and can see in focus to such and such a distance. Two things affect this field of view: the resolution and the lens of the camera.
- The Lens: Choosing a camera should be done carefully considering the lens of the camera. Some cameras have what is called a fixed lens, meaning they can not change their focus and field of view. Some have what is known as a varifocal lens or a PTZ (pan, tilt, zoom) lens which can be manipulated to change size and focus. Fixed lens cameras can be cheaper and if installed smartly will do a fine job. Varifocal lenses are versatile and cane be changed as a system or needs change.
- The Resolution: Analog cameras come with a TVL resolution or television lines of resolution. At best you might choose 700TVL, but most do not have that many lines of information and are more along the lines of 500TVL. Newer cameras have cinema quality resolutions such as 720p and 1080p! This kind of clarity allows for software to do facial identification and license plate recognition and is very likely to provide useful information for capturing any intruder.
There are many special features that surveillance cameras might have these days:
- Night-vision: A new and particularly effective ability, cameras are fitted with LED lights that project infrared light onto the field of view and the camera (which switches over to LED illumination in low lighting) can easily make out and record a useful image.
- Motion Detection: Cameras can actually turn themselves off so as to save space on the hard drive and turn on when a motion detection sensor is tripped. These cameras can also inform you when they have been turned on allowing you to act on the information you have received.
- Remote Monitoring: Many cameras can now be accessed via remote monitoring. This means that on your phone or computer you can access the live feed and check in on children, pets or household employees.
When you are on the look out for surveillance equipment to protect your home take into consideration these important elements and don’t settle for anything less than what you feel is the best quality protection out there.