Measure transpiration with minimal risk of breakages. The apparatus has only one glass component (capillary tube) which is securely mounted on a strong backing plate and printed with a 0-10cm scale. A cut plant shoot is inserted into an inlet tube, which is connected to a mounted syringe and capillary tube via a 3-way tap. The apparatus can also be used to measure humidity by connecting a porous pot to the third outlet. Supplied with instruction manual.