BMP390 gauge/relative pressure range

[Nate13046]

Hi all, 

I have read on the datasheet that the relative accuracy is +/- 0.03hPa and is between 700-1300hPa, I am just wondering if this is the range it can operate with that accuracy, or if is this the sensor operating limits when using relative pressure. because I am wanting to use this sensor for comparing the pressure between two points and the difference in pressure is only around 1hPa   

Cheers, Nathan 

[FAE_CA1]

Hi,

Thanks for your inquiry.

According to BMP390 datasheet the typical relative accuracy is +/-0.03hPa or +/-3Pa or +/-25cm under the range of 700 ~ 1100hPa and 25C ~ 40C per 10kPa or 100hPa. This means that in the range of 700 ~ 1100hPa and 25C ~ 40C if the environment pressure changes from 1030hPa to 930hPa with 100hPa delta by altitude going up for example, BMP390 will show pressure change of 100hPa +/- 0.03hPa. If the pressure change between two points in your application is only 1hPa in the range of 700 ~ 1100hPa and 25C ~ 40C, then BMP390 will show pressure change of these two points 1hPa +/- 0.03hPa.

Thanks.