Interior view of modified waste bin. Also note use of aluminum HVAC tape (with through rivets to provide necessary electrical bond to each stip) used to dissipate/ground unwanted static buildup.
Close-up of exterior of modified waste bin. I installed two pairs of these windows at ~70% full and ~90% Full. By installing a pair of windows at each level you can use a flashlight to visually detect levels well below either window.
General overview of bin-full window modification. Notice the two pairs of windows, providing not only obvious indication at ~70% and ~90% Full, but also allowing the use of a flashlight to view bin status at much lower limits as well.