I grew up in the country where our water was supplied by a well. Conservation was easy back then: if we used too much water, the well ran dry. These days my water comes from city. The water doesn't run out if I shower too long, but I still want to save water (and save money) when I can.
This project was a little easier than the power meter in terms of technical skills but it did require some basic plumbing know-how. The concept is simple enough: I installed a water meter on my home's incoming water line which flips a switch for each gallon of water traveling thought it. The switch creates electrical pulses that are are counted by an ioBridge module. The data is tracked by ioBridge.com using their free web based data logging service.
My plan was to do this over a weekend, but it only really took about an hour or two. I think I spent more time at the hardware store picking out the proper fittings and adapters than actually installing the stuff.
Hardware and Tools required:
DLJSJ75C Water Meter
IO-204 ioBridge Module
teflon plumbing tape
assorted plumbing fittings
2-conduction wire, about 20 ft.
PVC primer and cement
hacksaw (for cutting the pipe)