Wireless energy consumption monitor
British based company Energy Optimizers Limited offers an elegant and efficient way to monitor of energy consumption named Plogg. This a bit ugly looking unit can measure energy consumption in desired socket (and appliance, of couse) and transmit data to PC or controller via Bluetooth or ZigBee. Thanks to it the Plogg can be integrated with whole house automation system or with just standalone application on your PC.
The Plogg looks similar to Kill-A-Watt but the last one doesn’t have possibility to connect to PC. The price for unit is about 60 GBP (depends on using wireless technology). The application of the Plogg is reasonable if you need to see of energy consumption of specific device (or group devices). Otherwise the using of whole house energy monitors is more preferable.