05-18-2022 04:52 PM
Hi,
I am using two BMP390 sensors (adafruit breakout board) to measure relative altitude (vertical distance between the two sensors).
I have setup both sensors to the values recommended in the data sheet for highest resolution and low noise:
With this settings, I take forced measurements every second from both sensors at floor level of the same room.
The pressure difference is close to zero (some calibration may be required) but I am also observing tha the difference fluctuates in a range 5Pa wide.
Is that what I should expect given the accuracy specs of the sensor?
If that is the case, how can this sensor track the water level of a washing machine with mm precission? As the Bosh video (84) Water level detection in washing machines enabled by BMP390 - YouTube seems to suggest
thanks
Solved! Go to Solution.
07-02-2022 10:11 AM
Hi Robin,
I understand that +/-25cm (not meters) is the accuracy of air pressure equivalent altitude. And that is precisely what I was trying to measure but as I described in my previous post, I am getting a much larger range over a 5 minutes period (around 70cm).
How can the sensor be used as an altimeter in a drone then?
Regarding your description of the water level measurement, it suggests that the sensor is measuring hydrostatic pressure. Can this sensor be mounted underwater?
08-10-2022 10:32 AM
Hi BorisVian,
Normally, the test needs to be tested in a standard Lab environment. What is your test environment like?
09-08-2022 07:41 AM
Since there was no feedback for a long time, we close this topic first. You could update feedback in the future if you have.