Pressure sensor general accuracy is 0.3%FS appearance, pressure sensor is analog signal, should be continuous, why is there such precision limit?
My understanding is that the accuracy of the pressure sensors is nonlinear, hysteresis, repeatability, thermal, zero drift, and coefficient of thermal sensitivity, and the sum of squares (RSS) of the coefficients. Accuracy means the difference between the measured value and the actual pressure, rather than the minimum pressure that the sensor can identify. For example, the measuring range of the sensor is 100MPa, and the accuracy is 0.3Mpa. If the measurement is 70Mpa, the actual pressure may be a value between 70 + 0.3MPa (69.7-70.3), which does not exceed this range. At this time, if the pressure is increased by 0.1Mpa, the output of the sensor will increase, and the actual pressure is between 70.1 and 0.3MPa. The ability of the pressure sensor to distinguish the minimum pressure is much higher than the accuracy of the identification. It is not practical to identify this resolution, and the accuracy is affected by temperature, nonlinearity, etc., far beyond the effect of resolution.
My understanding is that the accuracy of the pressure sensors is nonlinear, hysteresis, repeatability, thermal, zero drift, and coefficient of thermal sensitivity, and the sum of squares (RSS) of the coefficients. Accuracy means the difference between the measured value and the actual pressure, rather than the minimum pressure that the sensor can identify. For example, the measuring range of the sensor is 100MPa, and the accuracy is 0.3Mpa. If the measurement is 70Mpa, the actual pressure may be a value between 70 + 0.3MPa (69.7-70.3), which does not exceed this range. At this time, if the pressure is increased by 0.1Mpa, the output of the sensor will increase, and the actual pressure is between 70.1 and 0.3MPa. The ability of the pressure sensor to distinguish the minimum pressure is much higher than the accuracy of the identification. It is not practical to identify this resolution, and the accuracy is affected by temperature, nonlinearity, etc., far beyond the effect of resolution.
