Conduct Probe Care 300ml

Conductivity Standard by Growth Technology has an electrical conductivity (EC) of 2.76 ms/cm ensuring that your EC/CF meter is calibrated and that it gives the correct reading when mixing nutrient solutions as too high, or too low, could have a detrimental effect on how plants grow and flower.

When using Conductivity Standard for EC meter should read 2.76, if not, it will need to be calibrated.