Manostat - an accurate gas pressure regulator (Englisch)

Certain laboratory tests require a gas source with a stable pressure. Commercially available gas pressure regulators address the above requirement. However, the accuracy of these devices is often insufficient and what is more, the market offer of accurate gas pressure regulators is limited. Moreover, the commercially available gas pressure regulators often do not fit the user's budget. Therefore, an attempt was made to develop a device which would meet all the user's requirements. This paper includes the description and specifications of a manostat-an accurate gas pressure regulator - designed and developed by the authors of this paper. The test results of the gas pressure regulation, obtained by means of the manostat, are also presented. The above mentioned test results proved among other things that for absolute gas pressure regulation within the range of 1 -7 bar, the accuracy of the regulation amounted to below +/- 0.001 bar in an 18 h test at a manostat output gas flow rate within the range of 0 - 0.45 STD dm³ min^-1.