and other beneficial minerals

12-24 months have passed since last replacement

The newly upgraded model features digital calibration

Measurement Display: 20 blue LEDs bar

The MW180 MAX pH/ORP/EC/TDS/NaCl/Temp

HI70031P Conductivity Calibration Standard 1413 µS/cm (25 x 20mL) | Hanna probe cleaning and other beneficial mineralsHI70031P Conductivity Calibration Standard 1413 S cm (25 x 20mL Sachets) Premium NIST traceable conductivity calibration solution standardized at 1,413 S cm for accurate calibration of EC meters, TDS testers, and conductivity instruments. Each box contains 25 single use sachets ideal for hydroponics, aquaponics, water quality testing, and laboratory applications. Why Choose HI70031P Calibration Standard? NIST traceable accuracy Standardized with