Hanna Instruments HI 2221N Calibration Check pH/ORP/Temperature Benchtop Meter
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<b>[Product Information]</b><br>
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<li>Up to five-point calibration with seven memorized buffers</li>
<li>Calibration Check for increased accuracy</li>
<li>Manual or Automatic Temperature Compensation (ATC) to eliminate the need for extra calculations</li>
<li>PC-compatible via USB port</li>
<li>LCD screen for readability</li>
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