Cctv Security Surveillance - Information to Help You Choose the Right Products for You
Prevents ingress of dust sufficient to cause harm.6 = Dust tight. No ingress of dust.Water Protection (second digit):0 = Non-protected1 = Protected against dripping water.2 = Protected against dripping water when tilted up to 15.3 = Protected against spraying water at an angle of up to 60.4 = Protected against splashing water from any direction.5 = Protected against jets of water from any direction.6 = Protected against heavy seas or powerful jets of water. Prevents ingress sufficient to cause harm.7 = Protected against the effects of temporary immersion in water.8 = Protected against the effects of continuous immersion in water.So for using CCTV cameras outdoors, I would recommend a very minimum IP rating of 55, but preferably 65 and above.Once you know this, go to the area where you want to install the camera and look at what you want the camera to see. How far is the scene you want to capture from the camera? How big is it? Think about this and make sure you know what lens size you need to be able to see the scene you want at the distance it is away. There are many CCTV Lens Calculators on the internet to help you.Consider, will you need to be able to see in dark conditions? Or only during the day time? If its needs to see in low light conditions, how dark does it get? Is there a street lamp near by? Or is there a security light on the premises? Go back at night time and see how dark it actually is, then use the Lux guide to see what kind of "minimum illumination" your camera requires. Keep in mind during the winter it gets dark very early, no good having a camera that's only useful during the summer.Lux Guide: 0.00005 lux = Starlight 0.0001 lux = Moonless overcast night sky 0.001 lux = Moonless clear night sky 0.01 lux = Quarter Moon 0.25 lux = Full Moon on a clear night1 lux = Moonlight at high altitude at tropical latitudes3 lux = Dark limit of civil twilight under a clear sky 32000 lux = Sunlight on an average day (min.) 100000 lux = Sunlight on an average day (max.)Is the camera going to be installed in such a place it may be subject to vandalism? If so make sure you use a vandal resistant camera.Ok, now hopefully you have a better idea about what a CCTV camera is and what kind best suits your situation.Pages: 1 2 3 4 [5] 6
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