Have a pH, EC, or Nitrate meter running low on solutions? Find them here!

450 ppm NO3-N Standard, 6 - 14ml bottles

For use with Cardy Twin Nitrate Meter Read More

34 ppm NO3-N Standard, 6 - 14mL bottles

For use with Cardy Twin Nitrate Meter Read More

Soil K+ Kit w/30 Samples

For use with Cardy Potassium K+ Meter Read More

Soil Na+ Kit W/30 Samples

For use with Cardy Potassium Na+ Meter Read More

150 PPM K Standard DI Water

For use with Cardy Potassium K+ Meter Read More

2000 PPM K+ Standard DI Water

For use with Cardy Potassium K+ Meter Read More

Refill Solutions-pH 4 & 7, 60 mL ea.

Refill solutions of pH 4 and 7. (2) 30mL of each solution. Read More

Conductivity Standard, 1.41 mS/cm, 250mL

Conductivity Standard, 1.41 mS/cm, 250mL Read More

Conductivity Standard, 2.76 mS/cm, 250mL

Conductivity Standard, 2.76 mS/cm, 250mL Read More

Cardy Twin EC Calibration Solution

Cardy Twin EC Calibratin Solution, for Cardy Twin EC Meter Read More

Chlorine Standard

Chlorine Standard. 1ppm - 3 ampules Read More

pH 4 Standard - 250mL

pH 4 Standard - 250mL Read More