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These sensors measure the differential pressure between two ports. If one is left open, measurement will be relative to atmospheric pressure.

Blowing into one port will produce a positive value, whereas blowing into the other port will product a negative value.

Applications include:

• Experiments involving a Manometer
• Breathing rate (with LOG3462)
• Production of gases in an enclosed atmosphere during photosynthesis of an aquatic plant
• Osmosis investigations
• Rate of Transpiration investigations