You should definitly try to purchase an instrumentation ampklifier. I built one for my Emg Project and although it performed well, it would have caused less headache if I just purchased it. The main importance in choosing an instrumentation amplifier is CMRR (Common Mode rejection Ratio)

Hi Guys

Just wondering if anybody would know what is the easiest way to read data from a glucose meter using arduino. I want to read data from One touch ultrameter and not too sure how to interface this with arduino. The ONE TOUCH Ultra Meter supports asynchronous, RS-232 communications via the data port at 9600 baud only.Data are transferred as 8-bit characters with no parity and one stop bit.  Any idea how to go about this? and any general information about UART, RS-232 and the arduino would be helpful

Cheers