Gives results in Pressure/Volume relationship of air at constant temperature.
A graduated (0-300) cm3 cylinder with closely fitting piston is connected to a pressure gauge by a narrow tube to minimize the dead volume.
Cylinder is made of transparent material to see the working process inside.
Pressure inside the cylinder can be adjusted by rotating the knob connected to the piston via threaded shaft.
A gas tap allows the cylinder to communicate with the outside air to adjust the mass of air enclosed.
The pressure can be directly read out from a big size pressure gauge circular dial, graduated in (0-3.4) x 10(5)Pa.