which Ph pen?

[L3G10N]

Im looking at buying one and not really sure which one is good. Any suggestions? Thanks.

http://cgi.ebay.com/New-Accurate-DIG...QQcmdZViewItem

http://cgi.ebay.com/Milwaukee-Digita...QQcmdZViewItem

http://cgi.ebay.com/NEW-Milwaukee-pH...QQcmdZViewItem

L3G10N Reviewed by L3G10N on 07-22-2006. which Ph pen? Im looking at buying one and not really sure which one is good. Any suggestions? Thanks. http://cgi.ebay.com/New-Accurate-DIGITAL-pH-METER-Hydroponics-Hydro-Tester_W0QQitemZ220007726612QQihZ012QQcategoryZ75670QQcmdZViewItem http://cgi.ebay.com/Milwaukee-Digital-pH-TESTER-Micro-Brewing-Wine-Making_W0QQitemZ180007762838QQihZ008QQcategoryZ38172QQrdZ1QQcmdZViewItem http://cgi.ebay.com/NEW-Milwaukee-pH51-Waterproof-pH-meter_W0QQitemZ230009360338QQihZ013QQcategoryZ58191QQrdZ1QQcmdZViewItem Rating: 5