Delta-T - Model EQ2 - Equitensiometer - Manual

The Equitensiometer measures soil matric potential - that is the negative pressure (or suction) required to extract water from between the matrix of soil particles. It is an important indication of plant water stress. The value of soil matric potential measured depends mainly on the quantity of water present and the make up of the soil, though it is also affected by temperature and salinity.