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Cleaning the Psychrometer Chamber
The Stem Psychrometer consists of two very small welded thermocouples
made of very fine 25µm wire.
This makes the sensor very sensitive for measuring water potential, but
equally sensitive to dirt and mild oxidation. It is recommended that before
starting any measurements you clean the thermocouples. The cleaning
process involved using an organic solvent such as chloroform, or electronics
contact cleaner.
Watch the Video:
https://www.youtube.com/watch?v=sUe2leJzxE0