On Fri, 10 Jul 2009 15:51:27 -0500, Jules wrote:

Always wondered how it worked - there was no power to the meter itself,
so presumably nothing in the way of smarts in the meter.

Wouldn't need much power. The flow of water and small turbine would
generate enough. The reader could induce power via the remote pickup
to enable the meter to be read.

--
Cheers
Dave.