CPC E04H 4/1281 (2013.01) [C02F 1/008 (2013.01); C02F 1/685 (2013.01); C02F 1/76 (2013.01); G01N 33/18 (2013.01); C02F 1/32 (2013.01); C02F 1/4674 (2013.01); C02F 1/78 (2013.01); C02F 2103/42 (2013.01); C02F 2201/006 (2013.01); C02F 2209/005 (2013.01); C02F 2209/008 (2013.01); C02F 2209/02 (2013.01); C02F 2209/06 (2013.01); C02F 2209/11 (2013.01); C02F 2209/29 (2013.01); C02F 2303/04 (2013.01)] | 8 Claims |
1. A method of controlling turbidity of water in a water installation, the method comprising:
sensing scattered sunlight reflected from a first area of a target in the water and from a second area of the target in the water;
generating a signal from the scattered sunlight reflected from the target by comparing the scattered sunlight reflected from the first area to scattered sunlight reflected from the second area; and
using the signal to control operation of a filter pump pumping water through a filter of the water installation.
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