The Digital Boyle's Law Apparatus can be used to demonstrate the relationship between pressure and volume of gas.

It is capable of:

• Enclosing volumes of air
• Changing the volume and pressure of the air
• Measuring pressures and volume changes

The unit consists of a 29mm diameter graduated cylinder with a piston and a screw valve. The cylinder acts upon a manometer through a narrow passage of 60mm diameter. The manometer dual scale is from 0–4 x 10^5 Pa and 0–58 PSI with the needle set at atmospheric pressure.

• Mounted on durable metal base
• No external pump required
• Total height: 211mm 
• Manometer dual scale is from 0-4 x 10^5Pa and 0-58 PSI with needle set at atmospheric pressure
• Requires 1.5 v AA battery for operation