With a Pneumeter you measure air pressure, in the picture a hand-held pneumeter for measuring the air pressure in bicycle tires.
Pneumatics is the use of compressed air for mechanical motion. It has many uses.[1]
Pneumatic transfer systems are employed in many industries to move powders and devices. Pneumatic devices are also used where electric motors cannot be used for safety reasons, such as deep in a mine where explosive dust or gases may be present.
The working fluid is very light in weight so supply hoses are not heavy.
Because the working fluid is (mostly) just air, there is usually no need for a return line for the working fluid and leaks of the working fluid tend not to be messy.
Because air is compressible, the equipment is less likely to be damaged by shock. The air in pneumatics absorbs excessive force, whereas the fluid of hydraulics directly transfers force.
Advantages of hydraulics
Higher energy density owing to the much higher working pressures usually employed.
The hydraulic working fluid is basically incompressible, leading to a minimum of spring action. When hydraulic fluid flow is stopped, the slightest motion of the load releases the pressure on the load; there is no need to "bleed off" pressurised air to release the pressure on the load...
References
↑In dentistry applications, pneumatic drills are lighter, faster, and simpler than an electric drill of the same power rating (because the compressor, is separate from the drill and pumped air is capable of rotating the drill bit at extremely high rpm).
Other websites
English Wiktionary
The English Wiktionary has a dictionary definition (meanings of a word) for: pneumatics
www.pneumatics.be - didactic website - for students - how pneumatics works
