i'm doing some "garage chemistry" and i need a pH tester for testing acids and bases ranging from 1 to about 12. would this one from ebay do the job??

http://cgi.ebay.com/NEW-Handheld-Swimming-Pool-Spa-Water-PH-Chlorine-tester_W0QQitemZ330303843055QQihZ014QQcategoryZ3243QQssPageNameZWDVWQQrdZ1QQcmdZViewItem
how about this one:

http://cgi.ebay.com/Digital-pH-Swimming-Pool-Meter-Tester-Water-Garden-p3_W0QQitemZ370148189447QQihZ024QQcategoryZ75670QQssPageNameZWDVWQQrdZ1QQcmdZViewItem