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Green and red LED lights respond to sensors depending on the water quality.
Brian S31
Brian S31 May 06, 2013
Green and red LED lights respond to sensors depending on the water quality.

I've seen these sensors...

Often 2
Occasionally 1
Rarely 1
Never 5
What is it? 0
1 Comment     9 Tags
Similar Photos: UV Hazard Meter...  http://www.sensorsma<wbr/><span class="wbr"></span>g.com/product/uv-haz<wbr/><span class="wbr"></span>ard-meter-gigahertz-<wbr/><span class="wbr"></span>optik Optex Redwall Outdoor Detector http://www.scoutlond<wbr/><span class="wbr"></span>on.com/2011/11/15/tf<wbr/><span class="wbr"></span>ls-online-countdown-<wbr/><span class="wbr"></span>system-is-live-publi<wbr/><span class="wbr"></span>cised/<br/>Also check this on TFL website. I use it on mobile.

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