Lidl did just a gadget a few months back - not sure how much it was but it did
integrate power over time - It was a 13 Amp plug one side and socket the other,
with a display and a few buttons, a bit like a timer.
Perhaps someone here got one and doesn't want it ?

Nick

"Bob Eager" wrote in message
...
On Mon, 23 May 2005 17:30:05 UTC, wig
wrote:

Can't you just use an ampmeter and measure the current?

P=IV so for 5 Amps
P= 5*240
P= 1200W

now to convert that into Kwh , I dunno maybe someone can help out?
1.2Kwh per hour just a guess

Yes, I just about remember that from my electronics degree! But I want
to integrate a variable current over time...

--
Bob Eager