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Smart Q secondary sensor range

Differential Gas Pressure - ± 10kPa - Order No. 3139
Differential Gas Pressure - ± 200kPa - Order No. 3141

These two sensors measure the differential pressure between its two ports.

If one port is open to the atmosphere then the sensor measures pressure relative to the atmospheric pressure. With both ports open to the atmosphere, the reading is 0. Blowing into one port will produce a positive value, whereas blowing into the other port will produce a negative value.

Differential Gas Pressure ± 10kPa (3130) has a very sensitive range and is suitable for a number of Biology experiments e.g. with the Breathing rate belt (3190), as a manometer, e.g. as in the Transpiration experiment described in the Interactive Datalogging worksheets, or investigating the uptake of oxygen by maggots, described in the manual.

Applications:
Biology:
Experiments involving a Manometer (3139)
Breathing rate (with Breathing Rate Belt 3139) (3139)
Production of gases in an enclosed atmosphere (O²) during photosynthesis of an aquatic plant (3139)
Osmosis investigations (3139)
Rate of Transpiration investigations (3139)
Physics:
Temperature/volume relationships (3141)
Boyle's Law (pressure vs volume) (3141)
Chemistry:
Rates of reaction where a gas is evolved (3141)