Gas Pressure - Differential 10kPa   Home / SmartQ Sensors  

This Differential Gas Pressure Sensor measure the difference in pressure between two ports. Its range makes it suitable for investigations that require measurement of small pressure changes with high resolution.

Normally one port would be a reference and the other connected to the pressure system being monitored. This low difference version makes it ideal for respiration and transpiration investigations.

 
Teaching applications:
  • Rate of respiration
  • Yeast fermentation (small scale)
  • Breathing rate (with breathing belt)
  • Depth gauge
  • Production of gases in an enclosed atmosphere Rate of Transpiration
 

If both ports are left open to the atmosphere, the effect of atmospheric pressure will equal each other out and the difference between the ports is zero. If only one port is used, and the unused port is left open to the atmosphere, the Sensor measures pressure above or below atmospheric pressure i.e. gauge pressure. Sample rate up to 20 µS intersample time External diameters of the ports are tapered from 4.0 to 4.3 mm. Use with flexible tubing 3.0 to 3.5 mm internal diameter. These Sensors are not suitable for use with flammable gases.

Contents/Details:

±10 kPa (Resolution 0.01 kPa)
±1.5 psi (Resolution 0.001 psi)

Available Resources

Downloads Gas Pressure Sensor Manual
Doc No.: DS030 | Issue: 4

Teaching Materials

Respiration with yeast (Biology (14-18) eBook)
The rate of respiration is temperature dependant. This set up gives a basic method to study the effect of temperature on respiratory activity. Could be used to introduce the advantage of warmblood to an organism.

View Worksheet Biology (14-18) eBook
A simple datalogging respirometer (Biology (14-18) eBook)
This is reworking of an old favourite of advanced biology teaching, it uses a differential Pressure sensor in place of a fluid filled capillary tube to make a respirometer.

View Worksheet Biology (14-18) eBook
Transpiration with a potometer (Biology (14-18) eBook)
A data logging version of a potometer.

View Worksheet Biology (14-18) eBook
Breathing Patterns (Biology (14-18) eBook)
Measure simple breathing patterns. Not a spirometer based exaercise. Good for breathing rate.

View Worksheet Teacher Notes Student Worksheet Biology (14-18) eBook
Catalse activity by pressure change (Biology (14-18) eBook)
The enzyme catalyse is a good experimental enzyme. It is found in all living tissues and is easily extracted. this variation uses a sealed vessel and monitors the change in pressure and the rate of change as a measure of activity.

View Worksheet Biology (14-18) eBook
How deep is the pond? (Biology (14-18) eBook)
This idea could be useful to show why a diver has problems with pressure or it could be useful as a utility in fieldwork to allow the students to get a depth measurement.

View Worksheet Biology (14-18) eBook
How does pressure change with height (Physics (14-18) : Light, Sound & Pressure eBook)
In the investigation students are asked to measure the pressure change over a small height change (a flight or two of stairs). They should see a clear relationship between height and pressure. It may not be linear, but it will be predictable.

View Worksheet Physics (14-18) : Light, Sound & Pressure eBook
How deep (data from meters) (Physics (14-18) : Light, Sound & Pressure eBook)
Using Meters from the Home screen of the software or the LCD screen of the logger – use the pressure acting at an open ended tube to estimate the depth of a body of water.

View Worksheet Physics (14-18) : Light, Sound & Pressure eBook
How deep (using snapshot) (Physics (14-18) : Light, Sound & Pressure eBook)
Pressure data is recorded by the data logger and or software. With a calibration curve plotted a simple depth sensor can be constructed.

View Worksheet Physics (14-18) : Light, Sound & Pressure eBook
How deep (Snapshot and values) (Physics (14-18) : Light, Sound & Pressure eBook)
Use the software to collect both pressure and depth data to construct a depth calibration curve fro an open tube immersed into water.

View Worksheet Physics (14-18) : Light, Sound & Pressure eBook
Pressure and temperature (Physics (14-18) : Light, Sound & Pressure eBook)
Uses simple fixed volume container to start explorations of the links between pressure, volume and temperature

View Worksheet Physics (14-18) : Light, Sound & Pressure eBook
How deep (Science At Work (11-16) eBook)
This idea could be used to show why a diver has problems with pressure or it could be useful as a utility in fieldwork to allow the students to get a depth measurement. It has the advantage that the depth measurement does not have to be vertical.

View Worksheet Science At Work (11-16) eBook
Order No. : 3139

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