Arduino Forum upgrade scheduled for Monday, October 20th, 11am-4pm (CEST). Sorry for the inconvenience!
Pages: [1]   Go Down
Author Topic: Sensing water?  (Read 856 times)
0 Members and 1 Guest are viewing this topic.
Offline Offline
Newbie
*
Karma: 0
Posts: 6
View Profile
 Bigger Bigger  Smaller Smaller  Reset Reset

I have a project that I'd like to do which would basically just alert me if water is detected. We have a basement location and with some storms, water creeps in when no there, which is a bad thing. I've searched this forum as well as the internet without much luck on what type of sensor would be used for something like this. Something I could run the wire next to the door, and just stick it in a corner location, so when water came in, it would immediately detect the moisture.

Electronics newbie here so forgive me if this is a super simple question. One thing to note there are small children in the area so I'd like to have something that's clean and protected.

Thanks!
Logged

Global Moderator
Netherlands
Offline Offline
Shannon Member
*****
Karma: 234
Posts: 14296
In theory there is no difference between theory and practice, however in practice there are many...
View Profile
 Bigger Bigger  Smaller Smaller  Reset Reset

water will conduct electricity so putting two nails in the place you want to measure 1 cm apart, connect one to 5V and the other to an analog input.
connect the analog port with a resistor to GND too and you have a minimal system to check for water.



Logged

Rob Tillaart

Nederlandse sectie - http://arduino.cc/forum/index.php/board,77.0.html -
(Please do not PM for private consultancy)

Grand Blanc, MI, USA
Offline Offline
Faraday Member
**
Karma: 97
Posts: 4118
CODE is a mass noun and should not be used in the plural or with an indefinite article.
View Profile
WWW
 Bigger Bigger  Smaller Smaller  Reset Reset

Similar recent discussion here:
http://arduino.cc/forum/index.php/topic,152516.0.html
Logged

MCP79411/12 RTC ... "One Million Ohms" ATtiny kit ... available at http://www.tindie.com/stores/JChristensen/

Florida
Offline Offline
God Member
*****
Karma: 2
Posts: 559
View Profile
 Bigger Bigger  Smaller Smaller  Reset Reset

I would use this sensor…

http://www.robotshop.com/productinfo.aspx?pc=RB-See-186&lang=en-US

http://www.robotshop.com/content/PDF/grove-moisture-sensor-sen92355p.pdf
Logged

Offline Offline
Newbie
*
Karma: 0
Posts: 6
View Profile
 Bigger Bigger  Smaller Smaller  Reset Reset

Perfect, thanks everyone! I think I'll give the sensor listed a try.

I appreciate the help!
Logged

New York, NY
Offline Offline
Full Member
***
Karma: 2
Posts: 144
"Why should I bother with made-up games when there are so many real ones going on." (c) Kurt Vonnegut
View Profile
 Bigger Bigger  Smaller Smaller  Reset Reset

You could use just two wires as a conductivity tool. One would be VCC+ and the other one would be connected to a pin that would sense the voltage fro the VCC+ with the analogRead() function. When the two wires contact the water the flow of electricity become higher and that way you could detect if there is any water.
« Last Edit: March 18, 2013, 09:38:56 am by mixania » Logged

Arduino Uno R3
Teensy 3.0
Mac OSX Yosemite

Pages: [1]   Go Up
Arduino Forum upgrade scheduled for Monday, October 20th, 11am-4pm (CEST). Sorry for the inconvenience!
Jump to: