Hi. I'm trying to read the water meter in my house with my Arduino, to be able to monitor my water usage on my computer, but without success.
My water meter is a Badger Meter Model 25 and looks like this:
I read somewere, that it should contain a magnet, which rotates when the water is running, so I tried if I could detect the magnetic field with a US1881 hall effect sensor: http://www.sparkfun.com/datasheets/Components/General/Hall-US1881EUA.pdf
but it does not detect anything.
I tested my circuit with a refrigerator magnet, and it seems to work.
Is the magnetic field in the water meter to weak, or am I using a sensor which is not sensitive enough?
Have any of you guys had success reading a meter like this?