1. What pressure value is suitable for sensor measurement?
Answer: The first thing to know is the maximum pressure required in the corresponding system. Then the maximum value of the pressure range of the optional pressure sensor should reach 1.5 times the maximum pressure value required by the system. These additional pressure ranges are due to many systems, especially water pressure and process control, where there are pressure spikes or continuous pulses. These spikes may reach five to ten times the "maximum" pressure, possibly causing damage to the sensor. Continuous high-pressure pulses approaching or exceeding the maximum rated pressure of the sensor will also shorten the life of the sensor. So just increasing the sensor's rated pressure is not a perfect solution, because it will sacrifice the resolution of the sensor. Buffers can also be used to attenuate spikes, but this is only a compromise, because it will reduce the response speed of the sensor.
2. What kind of accuracy does the sensor need to achieve?
Answer: Accuracy is a term commonly used in the industry to describe sensor output errors. It comes from non-linearity, hysteresis, non-repeatability, temperature, zero balance, correction and humidity effects. Generally, we designate accuracy as the combined effect of nonlinearity, hysteresis, and non-repeatability. For many sensors, the "accuracy" will be lower than the nominal value due to factors such as temperature and zero balance. The cost of sensors with higher accuracy will be higher, so does the corresponding system really need such high accuracy? The system composed of high-precision sensors and low-resolution instruments is actually an inefficient solution.