HI70031P Conductivity Calibration Standard 1413 µS/cm (25 x 20mL) | Hanna HI98331 3 microns — physically blocking

3 microns — physically blocking them before water reaches the downstream filter cartridge

The KCl in the outer chamber is silver free removing the risk of silver precipitation which can happen easily in the presence of heavy metals and Tris biological buffer

M10080B — 800 ppm TDS calibration solution sachet

and store upright

What's Included in This 2-Pack Combo

HI70031P Conductivity Calibration Standard 1413 µS/cm (25 x 20mL) | Hanna HI98331 3 microns — physically blockingHI70031P 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