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Portable TDS Meter Digital Tester Water Conductivity Temperature Test Pen

Traceable VWR 21800-012 Conductivity Meter With Probe & Travel Case Portable

OHAUS ST300C / Starter 300C Portable PH meter (no probe)

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

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

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

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