Hanna Instruments HI98103 Checker® pH Tester with 0.1 pH Resolution

The successor to the original Hanna Checker pH tester is the HI98103 Checker. More than 1 million Checker pH meters have been used since its inception in 1991, making it the most widely used pH meter worldwide. Students and researchers alike have benefited from the Checker’s ability to detect pH simply and effectively.

  • One-button operation
  • Replaceable pH electrode
  • ±0.2 pH accuracy


  • Large LCD displays stability indicator, low-battery indicator and calibration tags
  • Replaceable pH Electrode the HI1271 gel-filled pH electrode fits easily into containers with a small opening
  • Automatic calibration to one or two points
  • Automatic recognition of standard buffers and displayed calibration tags
  • Automatic shut-off with user-controlled settings to conserve battery life
  • Long battery life of approximately 1000 hours
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