Recommendation 109 - Pressure gauges and vacuum gauges with elastic sensing elements (standard instruments)

This Recommendation applies to pressure gauges and vacuum gauges (standard instruments) with elastic sensing elements. The application of this Recommendation is limited to instruments in which the elastic deformation of the sensing element is mechanically transmitted to the indicating device using a pointer and a dial graduated in legal units of pressure, and in which the upper limit of the measuring range is between 0.06 MPa and 250 MPa for pressure gauges, and between- 0.1 MPa and zero for vacuum gauges.