HM L-CON series Precision 

Conductivity/TDS/Salinity/Resistivity/℃/℉ meter

HM L-ION-H Precision Ion/ ORP/pH/℃/℉ Meter

HM L-DO-H Precision Dissolved Oxygen Meter

HM L-TDS-H Precision

TDS/Conductivity/Salinity/Resistivity/℃/℉ Meter

HM L-PH-O Outdoor Precision pH/ORP/℃/℉ Meter

HM L-CON-O Outdoor Precision

Conductivity/TDS/Salinity/℃ Meter

HM L-DO-O Outdoor Precision Dissolved Oxygen Meter

HM L-TDS-O Outdoor Precision

TDS/Conductivity/ Salinity/℃ Meter

HM L-PH-P Pen Waterproof PH Meter

HM L-CON-P Pen Waterproof Conductivity/℃ Meter

HM L-TDS-P Pen Waterproof TDS/℃ Meter