MSP430G2102: Capacitiive Sensing - Active Guard Ring

Part Number:MSP430G2102

Hello,

I am designing a high volume liquid level sensory using the MSP430G2102.  The initial is design is working well.  However, we would like to implement an active guard ring to improve performance.  I have read app notes using an active guard ring but none that include using an MSP part.  Can you please let me know how I can implement this feature from both the hardware and software side.

Thanks,

Mark