Allows the students to measure transpiration with minimal risk of breakages.
The apparatus is submerged and the specimen placed in the tube.
When transpiration occurs, the bubble within the capillary moves.
A syringe is used to zero the scale.
The apparatus has only one glass component (the capillary tube) and is mounted on a strong backing plate.
The apparatus can also be used to measure humidity by connecting a porous pot.
Used to show transpiration which occurs in small plant shoots.