(JIS B 7505 quoted partially)
The gauge uses the Bourdon tube as a transducer element, converts the energy of the pressure itself directly to mechanical motion and indicates the pressure value via the magnifying mechanism, so it has the following features.
1.Inexpensive and highly accurate measuring can be done due to simple mechanism.
2.Since the structure is simple, it has capability to meet various type of needs by changing some parts.
3. In addition, measuring can be done anywhere because no energy such as electricity or fuel required.