Optical intruments for sediment monitoring (algal growth)

In-situ measurement of suspended solids in water is often implemented using simple light transmission measuring transducers. All such transducers are subject to fouling of the optical surfaces by various contaminant mechanisms. The evolution of sensor design has resulted in the use of solid state light sources, and the objective of this research was to try to establish any benefits accruing from the selective use of source wave-length.