Formerly, this gauge pressure using a detrimental indicator was also designated as underpressure. In an effort to prevent misunderstandings which could crop up within the indication, the designation 'underpressure' is at present not made use of any longer. According to the place of application in the pressure gauge, Bourdon tubes, https://israelerukp.designertoblog.com/43695261/how-much-you-need-to-expect-you-ll-pay-for-a-good-pressure-gauge-10-bar