a) The topside Surface Readout Unit (SRU) which includes the lasers, computers, software, various power options, communications modules, cabling and field enclosures; and

b) The downhole fiberoptic lead cable built to various specifications depending on the operating temperatures inside the well, and how many fibers are used in the system.

c) Fiberoptic sensor gauge mounted in a gauge carrier which senses single point pressure and temperature measurements