Science experiments for data loggers and oscilloscopes. An educational experiment about transpiration. Transpiration Introduction Transpiration is the evaporation of water into the atmosphere from the leaves and stems of plants.
Plants absorb water through their roots.
This water can come from deep in the soil. In the desert plants roots can penetrate as deep as 20 meters underground. This is a simple experiment to prove that water is evapourating from the plant. The apparatus is setup as shown in the diagram. One branch of the plant, the humidity sensor and the temperature sensor are placed into the polythene bag and the end tied up with string.