August Abolins wrote in a message to All:

 AA> Hi All,   Does anyone here know a good supplier for a KWH meter
 AA> that can be used on "per appliance basis"?  The first thing I've
 AA> been able to dig up in the internet is something supplied at: 
 AA>    
 AA> http://www.advancedenergyonline.com/catalog/systemcomponents/meters
 AA> .htm#227 

 AA> Watts Up? Kilowatt-Hour Meter

 AA> The Watts Up kilowatt-hour meter is easy to set-up and use. It
 AA> gives the user power usage information for individual appliances,
 AA> displaying true power consumed, (including power factor
 AA> information), and keeps track of cumulative kilowatt-hours,
 AA> cumulative time the meter has been plugged in, and amount of money
 AA> the electricity consumed costs. A 15 amp circuit breaker protects
 AA> against overloads. UL listed. 

 AA> 28-280-025 Watts Up? kWh Meter $95.95 
 AA>  
 AA> ...but there is no illustration of the product available, so it's
 AA> hard to shop for this thing.  I'd like to use a KWH meter to
 AA> monitor the usage (# of times on/off, and kwh's) of a water pump.

It's been quite some time since I read it,  but Steve Ciarcia had an
article in Byte magazine a number of years back that *might* do what you
want.  I can remember that he used 0.1 or maybe 0.01 ohm resistors in
series with the loads to sense current,  but not much beyond that.  I think
there was an LM324 op amp on the hot side of things,  and the rest of it
was optoisolated,  but can't remember what all it was supposed to do.

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