The gas pressure syringe is used to set the volume of gas samples, or to manually change the pressure of a gas experiment.
Applications: Gas Laws
Features: Durable, Inexpensive, Easy to Use
The Model 2011 Gas Pressure Syringe is a calibrated, 60 mL syringe. The volume in the syringe may be adjusted by moving the plunger in the syringe to the desired volume. An included short flexible hose with a Luer fitting is used to connect the syringe to a MicroLab gas pressure input, or to a Luer fitting in another gas experiment.
A three-way valve permits opening either the syringe or the hose to the MicroLab pressure input to ambient pressure during set-up.
The handle of the valve points to the valve input that is closed.
For Boyle's Law experiments, we recommend that students start the experiment at a volume of 20 mL and ambient pressure. Then pull the plunger out to take volume/pressure readings at 5 mL increments. It is difficult to pull hard enough to reduce the pressure by more than a factor of two (40 mL).
The internal pressure sensor in the MicroLab will measure 0-2 atm pressure. As a safety feature to protect the sensor, the hose will pop off the sensor at about 3 atm pressure.
By reducing instead of increasing pressure during the experiment, there is no possibility of blowing the hose off the sensor.