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You can use the air-pressure module to measure the absolute air pressure. Please note that it is the relative air pressure that given in, for example, weather reports or other media. The relative air pressure always refers to sea-level.
This module was developed to automatically compensate for the realtively high dependency of the oxygen saturation in the water on air pressure. If the air pressure is not taken into consideration, it is quite feasible that errors in measurement can result of around 5% in the figure for oxygen saturation.
Technical data IKS air-pressure module:
Measuring range: 200 mbar to 1050 mbar -
Your question: IKS air-pressure module
