Some alarm systems are tied to video surveillance systems so that current video of the intrusion area can be instantly displayed on a remote monitor, not to mention recorded. Some alarm systems use real-time audio and video monitoring technology to verify the legitimacy of an alarm.
Pipe(noun) any long tube or hollow body of wood, metal, earthenware, or the like: especially, one used as a conductor of water, steam, gas, etc. Pipe(noun) a small bowl with a hollow steam, -- used in smoking tobacco, and, sometimes, other substances.
1 Diameter refers to outside diameter of a pipe or fitting. 2  The North American standard is known as Nominal Pipe Size (NPS). 3  The International Standard is known as Diameter Nominal (DN). 4  Pipes and fittings are actually made in similar sizes around the world: they are just labeled differently.