HI 4522

Research Grade Meter with Calibration Check and USP
pH/ORP/ISE and EC/TDS/Resistivity/Salinity and Temperature

HI 4521

Research Grade Meter with Calibration Check and USP
pH/ORP and EC/TDS/Resistivity/Salinity and Temperature

HI 4222

Research Grade Meter with Calibration Check
pH/ORP/ISE & Resistivity/Salinity & Temperature

HI 3512

Two Channel, pH/ORP/ISE, EC/TD/NaCl/Resistivity Benchtop Meter

HI 3222

pH/ORP/ISE Graphic LCD pH Benchtop Meter
with two input channels

HI 3221

pH/ORP/ISE Graphic LCD pH Benchtop Meter

HI 2550

pH/ORP/ISE/EC/TDS/NaCl Benchtop Meter