Ideal for laboratory or field use. Allows students to measure transpiration with minimal risk of breakages. The apparatus has only one glass component (capillary tube) and is mounted on a strong plate. It consists of capillary tube with millimeter scale connected via. 3 - way tap to syringe. The cut shoot is connected to a third outlet. The apparatus can also measure humidity by connecting a porous pot to the third outlet. 15 x 16 x 8cm. Capillary tube 120 x 1mm.