User's Manual

Model No. PS-2108 Dissolved Oxygen Sensor
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1. Water Temperature effects
• Gases usually dissolve in liquids in an exothermic process. This expression represents that
process:
gas + solvent liquid  gas saturated solvent + heat (this will reach an equilibrium)
• Le Chatelier's Principle predicts that an added stress to one side of this equilibrium will
cause a shift in equilibrium in order to accommodate that stress, thereby driving the
equilibrium point to the left in the expression below:
GAS + solvent liquid  gas saturated solvent +heat
• Experimental results support this theory:
This graph was constructed using DataStudio, drawing on data taken from Table HY-DO-1 in
the GLOBE protocol for Dissolved Oxygen.
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