The Oakton pHTestr Pocket pH meter has been discontinued. Replacement probes still available. 

• Testers are waterproof and they float!
• Dustproof housing maintains tester integrity even in harsh field conditions.
• Replaceable electrode module.
• pHTestr 3+ toggles between pH and temperature readings.
• pHTestr 2 and 3+ feature automatic temperature compensation from 0 to 50°C.
• Auto-buffer recognition with push-button calibration.
• Auto-off after 8.5 minutes and hold function.
• Self-diagnostic error messages.
• Testers are economical and easy to use.
• Power: 4 x 1.5V batteries (included) for ~ 250 hours continuous use.
• 1 year warranty.
  
  All pHTestrs supplied with detachable electrode sensors, batteries and instructions. Calibration kits include “Singles” calibration pouches (two each of pH 4.01, 7.00, 10.00 and rinse water), sample jar and sturdy carrying case.