Abstract
Several instruments are available in the market for the accurate and precise measurement of pressure. Due to numerous influencing elements and the lack of a well-defined mathematical model, calculating the uncertainty in the category of electromechanical pressure transducers has long been a laborious task for researchers. The “Guide to the Expression of Uncertainty in Measurement (GUM)” and “Guidelines on the Calibration of Electromechanical Manometers (Calibration Guide EURAMET/Version 4.1)” are the main directional guides for harmonizing the method of evaluation of measurement uncertainty associated with pressure measuring instruments. The present chapter describes the various uncertainty estimation models developed for the evaluation of measurement uncertainty associated with the electromechanical type of pressure transducers. For the evaluation of the measurement uncertainty of such pressure measuring equipment, a thorough comparative study using Least Square Fitting (LSF), Monte Carlo simulation (MCS), and EURAMET approach is presented. It is shown through an example of a case study on a digital pressure transducer (DPT) up to the pressure range of 800 MPa. The results obtained using three different approaches are in excellent agreement and quite comparable, allowing us to assess the viability and practical applicability of these modern techniques.
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