BMP Datasheet accuracy

[user2]

Hello,

I have a question about the "Relative pressure accuracy" value in BMP280 and BMP581 datasheets.  The value is given in +- Pascal.

Can someone give some information on the percentage of measurement values that fall within that range? Is it like a 3-, 4- or 5-sigma range?

Thank you in advance!

[BSTRobin]

Hi user2,

The indicator for measuring relative accuracy is not a percentage, its unit is Pa.
Relative accuracy means the maximum error when you travel from one height to the other height.

[user2]

Hi,

thank you for the answer. 

Is there any information about the statistical variance / standard deviation of the measurement? In real measurements no value comes even close to being +- 6 Pa off, usually it's like +- 1-2 Pa, so the sensor seems much more reliable most of the time.

I was looking for a statistical information like "68 % (1 sigma) of measurements have an error of +- 2 Pa or less" or "95 % of values (2 sigma) have an error of +- 4 Pa or less" because the maximum error of 6 Pa is way bigger than the average error I see in measurements.

Thank you in advance!