Water Shut Off System Chapter 2 (Sensors)

RE: Water Shut Off System Chapter 2 (Sensors)

shabaz — Tue, 16 Aug 2016 22:54:05 GMT

Hi John,

Very nice project and very clever water sensors!

RE: Water Shut Off System Chapter 2 (Sensors)

volly — Tue, 16 Aug 2016 15:21:05 GMT

[mention:f80b53cee57c44bc9d7c577d07d7c791:e9ed411860ed4f2ba0265705b8793d05]. I am willing to wait and see how your plan pans out.....

RE: Water Shut Off System Chapter 2 (Sensors)

DAB — Tue, 05 Jul 2016 18:42:49 GMT

Very nice simple sensor design John.

As others have stated, you might get some humidity issues, but if you keep a careful measurement of them over time, you should be able to factor humidity out of your detection logic.

You might also run some tests to measure the sensor sensitivity to moisture by starting with a sensor and then add water droplets one at a time to see how much moisture gives you which readings.

This would be a great science fair project for you grandson.

DAB

RE: Water Shut Off System Chapter 2 (Sensors)

michaelkellett — Tue, 05 Jul 2016 07:48:21 GMT

You may have problems with humidity: sodium chloride is quite hygroscopic (and so are paper towels) and will absorb water from the air if the RH is high enough. Test your sensors carefully if you don't want surprise water cut offs.