Patent ID: 8883079

Claim:
A water-quality monitoring system for monitoring quality of water in an aquatic environment, comprising: a chemical indicator wheel designed and configured to be submerged in the water of the aquatic environment during monitoring of changes in levels of one or more constituents of the water, said chemical indicator wheel including: a holder having a rotational axis; and a plurality of chemical indicators fixedly supported by said holder, wherein said plurality of chemical indicators are designed and configured to continuously undergo optically detectable changes in response to increasing and decreasing changes over time in levels of corresponding respective differing constituents of the water; and a monitoring unit that includes: an optical reader designed and configured to acquire optical readings of each of said plurality of indicators; and a drive system designed and configured to drive said chemical indicator wheel to at least one reading position for each of said plurality of chemical indicators, wherein said optical reader can take a reading of each of said plurality of chemical indicators while the chemical indicator wheel is submerged in the water of the aquatic environment.