I need to a mini digital multimeter which can measure the amp & volt of a line and then transmit the measured values to a computer. How to accomplish this? Is there a device which does that already? The closest i got is this and this.
Should support around 240V and 80A.

Thanks.

 

Search that site for "multimeter USB" to see some examples of units to make these readings.

240 v is something any unit will do. 80 amps is not something typically found, so you may need a current shunt to adapt one.

 

Did that, but its showing a either large multimeters(12cmx5cm) with usb interface or smaller ones for measuring usb ports in computers(5V range).