It's a difference of 1.8 kPa (0.26 PSI) for 150 m (492 ft)...
With that device, without all the other errors (V reading from the sensor, calibration problems...), you'll know if you're on ground, at 200 ft or to high !!!
Actually, once you look at the specs it's not very accurate at all, being rated at +-1kPa (10hPa). Other sensors in the same price range are rated at around +-1hPa (accuracy).
Which is a shame, it's in a nice package. Still, maybe it will come out at an even cheaper price than expected.
Comments
Do you know any other altimeter device usable in UAVs, other than using the GPS ?
P(@150m) = P(@0m) [ 1 - 0.00650 * Altitude / T(@0m) ] ^ 5.26 = 99.51 kPa
It's a difference of 1.8 kPa (0.26 PSI) for 150 m (492 ft)...
With that device, without all the other errors (V reading from the sensor, calibration problems...), you'll know if you're on ground, at 200 ft or to high !!!
Which is a shame, it's in a nice package. Still, maybe it will come out at an even cheaper price than expected.
Now we need Freescale to release a smaller packaged differential (ported) pressure sensor. The MPXV variants are quite large...
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