Does the shape of the container affect the sensors ability to detect water?
Yes, shape and color of the container matter. Even labels can affect the ability of the sensor to burn through a container. Typically a container has fairly thin walls while the liquid contents are a thick layer – think of a plastic water bottle. With an empty container, the thin plastic walls block a small percentage of the light, but when the container is filled with water, the relatively thick layer of water absorbs a large percentage of the emitted light. This contrast between the empty and full container results in a high contrast sensing application because water absorbs the 1450 nm wavelength of light.
