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HANNA HI9813-6 Waterproof Portable pH/EC/TDS/Temperature Meter with CAL CHECK™ (0.0〜14.0 pH、0.00〜4.00 mS / cm、0〜1999 ppm（mg / L）、0.0〜60)
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pH 10.01 Calibration Buffer Solution - Hanna Instruments
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HI7007/1G pH 7.01 Calibration Solution (1 G ( 3.78 L))
$179.00 Hanna HI98121 pH ORP Thermo Meter Chlorine HI 98121 – NISupply
