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Potometer, Simple
Potometer, Simple
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Potometer, Ganong’s
Potometer, Ganong’s

Potometer and Atmometer

The instruments used to study plant transpiration are the potometer and the atmometer. The atmometer monitors evaporation from a moist surface to determine relative humidity, while the potometer measures water intake by a cut plant shoot.

 

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The instruments used to study plant transpiration are the potometer and the atmometer. The atmometer monitors evaporation from a moist surface to determine relative humidity, while the potometer measures water intake by a cut plant shoot.

A three-way stopcock connects a capillary tube with millimetre markings, a syringe, and an output to form the potometer. The outlet of the syringe attaches to the cut plant shoot or a porous pot, while the syringe assists in setting the air bubble. This makes it possible to observe water absorption rates, which supports study on transpiration.

The atmometer substitutes a permeable pot with water for the cut shoot. It offers information on changes in relative humidity by measuring evaporation rates from the moist surface. Controlled investigations on the effects of ambient moisture and plant transpiration are made possible thanks to the mounting of both devices on a sturdy vertical plate.

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