Water is not desired in diesel fuel, hydraulic fluids, lubricants. High concentration of water can cause severe disturbance in operation and damage.
The SFS H2O measures the relative humidity of the fluid (diesel & oil) and directly displays the saturation degree in the water:
› 0%: Absolutely dry oil.
› 100%: The oil is completely saturated with water. Additional water will not be dissolved anymore and will present itself as free water.
In contrast to the humidity analysis from laboratories, where the absolute water content is defined in ppm (parts per million), the saturation limit of the oil can be determined by relative humidity measurement. The advantage of the relative humidity over the absolute water content is, that it is not necessary to know the oil or its saturation limit in order to determine if there is free or dissolved water.