Ravi, I would suggest that you use Platinum or gold for the electrodes.=20 You could also use oxygen free water. Stainless steel would be better=20 than regular steel. Steel will quickly corrode and this will change the=20 characteristics of the solution. What level of stability are you looking=20 for? Thanks, rich! On 9/11/2014 10:57 AM, Ravi wrote: > Russell, > >> This may have been asked. >> >> If you place a resistor of similar resistance to the salt solution acros= s >> the probes at night and repeat in morning, do you get a shift in frequen= cy >> , and if so, how much? > this I will try tonight. > >> Electrodes - Platinum wire? > I think it is steel wires or some plated wires from HM digital. > > Cheers > > Ravi > > >> >> >> Russell >> >> >> On >> --=20 http://www.piclist.com/techref/piclist PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .