Design and Metrological Analysis of An Automatic Air Pressure Measurement Instrument Using Arduino Mega 2560

Arduino-based 0-300 psi pressure gauge is a pressure gauge used to monitor the pressure in tanks and similar equipment. The purpose of this research is to make and analyze a pressure gauge that is capable of measuring pressure from 0 - 300 psi, as well as to carry out a metrological analysis to find out the magnitude of the increase in the gauge made. The device testing method used is by testing the sensor features and reading the Arduino ADC features. Furthermore, measuring instruments that have been made by the military use the standard. Namely in the form of a pressure module to determine the magnitude of the release of the measuring instrument being made. The results of the research on the characteristics of the Arduino ADC voltage readings obtained a precision value of 99.98%, an accuracy value of 98.51%, and a correction value of 0.021 volts. The results of the sensor output voltage sensor characteristics are proportional to the pressure increase given. The results of device verification have shown that the pressure gauge has a correction and extended application to standard pressures of 0 psi, 31.6 psi, 63.9 psi, 94.5 psi, 127.7 psi, 153.4 psi, 184.4 psi, 215.2 psi, 247.3 psi, 277.9 psi 299.5 psi With the correction values are 0 psi, 0.1 psi, 0.1 psi, 0.1 psi, 0.1 psi, 0 psi, 0.1 psi, 0.1 psi, 0.2 psi, 0.2 psi, 0.1 psi, and expansion values are respectively 0.058 psi, 0.058 psi, 0.066 psi, 0.065 psi, 0.065 psi, 0.069 psi, 0.063 psi, 0.068 psi, 0.065 psi, 0.062 psi, 0.074 psi, and 0.069 psi. In addition to corrections and expanded uncertainty, the study also look for other parameters, namely precision and accuracy, 99.44% precision values, and 99.82% accuracy. Based on the research that has been done, it can be interpreted that the pressure gauge made has a fairly good level of accuracy and precision.