metal tube 220 such as steel or aluminum tube the metal tube 220 is constructed and arranged to protect the fibers 215 from a harmful wellbore environment that may include a high concentration of hydrogen water or other corrosive wellbore fluid additionally the metal tube 220 protects the fibers 215 from mechanical forces generated during the deployment of the sensor line 200 which could damage the fibers 215 preferably a gel not shown is inserted into the metal tube 220 along with the fibers 215 for additional protection from humidity and to protect the fibers 215 from the attack of hydrogen that may darken the fibers 215 causing a decrease in optical performance in an alternative embodiment the sensor line 200 consists of a plurality of optical fibers 215 encased in a protective polymer sheath not shown such as teflon ryton or peek in this embodiment the protective sheath may include an integral cup shaped contours molded into the sheath to facilitate pumping the sensor line 200 down the control lines 190 175 in some embodiments the sensor line 200 may include electrical lines hydraulic lines fiber optic lines or a combination thereof fig6 is a cross sectional view illustrating the sensor line 200 mechanically disposed in the passageway 210 preferably the sensor line 200 is placed at the surface of the wellbore 100 on a roll for ease of transport and to facilitate the placement of the sensor line 200 into the wellbore 100 thereafter a leading edge of the sensor line 200 is introduced into the passageway 210 at the top of the upper control line 190 then the sensor line 200 is urged by a mechanical force through the entire passageway 210 consisting of the upper control line 190 hydraulic connect 195 and.