Growth Technology Conductivity Standard 2.76 250ml

Regular calibration of EC meters is essential. If EC meters are not reading correctly than the grower is misinformed as to the strength of the nutrient solution which could have deleterious effects on the plants in the system.

This standard is 2.76mS/cm and meters that are calibrated in milliSeimens should be calibrated to this level. For meters that read in parts per million (ppm) things are a little more complicated. All EC meters measure EC in mS/cm. The meters that have a read-out in ppm have electronically converted mS to ppm. The problem is that different manufacturers convert mS to ppm in different ways.