Because the emitters and sensors are side looking I decided to drill small holes only just bigger than the small lenses and secure them to the tube using some heat shrinkable tubing.
|Section cut from Google sketchup|
Once the whole thing is complete I intend to place the whole length in a piece of heat shrink.
I used some Veroboard to mount the sensors and I'll use the copper tracks to feed all the power and signals, I should be able to use a 4 core cable, VCC, GND, output1 and output 2.
|Sensors secured to tube with heat shrink tubing|
That's all for now.