Home Energy Monitoring via flashing LED on Meter

here they describe how they built the sensors:
http://www.bwired.nl/How_rfxcom.asp

they use a
http://www.bwired.nl/images/how/bpw85.pdf

sounds similar to ur meter...
but it blinks about 3 times less often per 1kWh...
btw: they write kW too...