I have a water meter. Because it is in the back garden, the water company fitter a wireless reading head. The meter is about 60cm underground, and it is at the bottom of a plastic tube (~20cm dia) buried in the earth. The transmit head is located (ish, see below) near the top of this ...
Read full article: Self-defeating remote water meter
from Electronics Weekly http://www.electronicsweekly.com/blogs/engineer-in-wonderland/self-defeating-remote-water-meter-2016-09/
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