To measure transpiration, without breakage. Only one glass component (the capillary tube) and is mounted on a wrong backing plate. It consists of a capillary tube with millimeter scale connected via a three way tap to a syringe. The cut shoot is connected to the third outlet. It can also be used to measure humidity by connecting a porous pot to the third outlet. Dimensions overall 155x165x60mm, width x height x length.