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pH

Hanna Instruments HI5221 Laboratory Research Grade Benchtop pH/mV Meter with 0.001 pH

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Ion Selective Electrode (ISE)

Hanna Instruments HI5222 Laboratory Research Grade Two Channel Benchtop pH/mV/ISE Meter

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Electrical Conductivity (EC)

Hanna Instruments HI5521 Laboratory Research Grade Benchtop pH/mV and EC/TDS/Salinity/Resistivity Meter

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Electrical Conductivity (EC)

Hanna Instruments HI5522 Laboratory Research Grade Benchtop pH/mV/ISE and EC/TDS/Salinity/Resistivity Meter