 CF (conductivity factor) is basically EC multiplied by 10, and is used in some places because it eliminates the need for a decimal point, so an EC of 0.1 is equal to a CF of 1.Electrical conductivity can be expressed using a number of different units but the international standard is EC, and the unit of measurement is usually milliSiemens or microSiemens.The difference between these two units of measurement is the placement of the decimal point, so 1 milliSiemens is equal to 1000 microSiemens.