Water Quality Indicator Lights
|These indicator lights are used to let you know if the water you are using is at the quality you want. This economic alternative to a meter. With one version of these indicators the light will turn green when the water is good and will turn it red when the light is bad. Another version simply turns on a light when the water is good and turns off a light when the water is bad. Both versions are available in many different setting. Also remove lights and light with alarm controllers are listed here.