We are considering "bme280" Digital humidity and pressure sensor for our application. Need some clarification related to "pressure sensor" performance. 1) In datasheet, relative accuracy stated as 12 Pa. a. Is it a Part to Part variation? b. What is the repeatability of this Sensor over time (say 24 hours) (measured drift / oscillations in pascal, if there is no change in environment)? 2) In end application (0 to 1000 Meter altitude), we need to measure the as close as 10 Pa Pressure difference (Difference from two sensors readout). a. We have a flexibility of doing error cancellation (Read the two sensor values and the difference is marked as offset error which will be used to calibrate the reading). Will this bring the effective error less than 10Pa (peak to peak)? b. If above solution gives 10 Pa (peak to Peak) accuracy, how frequent (24hours once / 48 hours once) we need to do a new error calculation? Your clarification will help us to proceed the design. Looking forward to receive your response ASAP.
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