Apera Instruments Value Series PC 850 Portable pH / mV / Cond / TDS / Temp

Apera Instruments PC 823-B Portable pH/EC/TDS/Temp Meter

Portable Multi-Parameter Meter Kit (pH/Conductivity/TDS/Temp.)

Thermo Scientific Orion Star A329 Portable pH/ISE/Conductivity Meter

Apera Instruments 201T-F All-in-one pH Electrode ATC BNC/RCA Connector

APERA Instruments SX721 pH/ORP/Conductivity/TDS ++ Portable Meter Kit

Apera Instruments WS200 Fluoride/pH/Conductivity 7-in-1 Portable Meter Kit

Apera Series EC60 Cond/TDS/Salinity Waterproof Conductivity Pocket Tester