The measurement of water used by plants is a fundamental element for irrigation studies.
The EID 240 lysimeter makes it possible to highlight evapotranspiration and to make a simple but correct assessment in the laboratory.
This apparatus uses several tanks of different diameters, filled with earth, in which the plants to be studied grow. One of the tanks is placed on the hydraulic plate connected to an inclined manometer adjustable in height (compensation of the tare). The evapotranspiration creates a variation of weight which results in a variation of pressure read on the manometer. It is thus possible to measure the amount of water evaporated as a function of time. A scale (1mm) on the manometer corresponds to 25 g.
The drainage water is collected in the container placed under the lysimeter and can thus be measured.
The approximate weight of the bins is of the order of 20 kg. They can therefore be easily moved. These bins are put in place either outside or in greenhouses then retransported in the laboratory for measurements.