This research presents a low-cost sensor for measuring liquid levels using plastic optical fibers (POF). In this paper, a novel liquid level sensing system is proposed to enhance the capacity of the sensing system, as well as reduce the cost and increase the sensing accuracy. The sensor reduces the scattering-based optical losses in the fiber, which increase linearly with the liquid height.
[pdf] Install cables in conduits or use armored sheaths for physical protection. Seal all building entry points to keep out moisture. Work with professionals who know the National Electrical Code and local regulations. Testing standards require you to check splices and installed cable plants for. Based on installation methods, outdoor fiber optic cables are categorized as follows: Underground fiber cables are generally pulled within a conduit that is buried underground, usually 1 to 2 meters deep, to reduce the possibility of being dug up. 2 meters (3-4 feet) deep to reduce the likelihood of accidentally being dug up. Having outlined the two strategies, one can easily note some advantages and disadvantages of each of the approaches. (FOA) was founded in 1995 to help develop the workforce to build the fiber optic networks to support a rapid expansion in communications and the Internet.
[pdf] 
