Comment by Angus Peart on June 2, 2009 at 10:16pm

Nice! Looks like the price will be around $10.

Now we need Freescale to release a smaller packaged differential (ported) pressure sensor. The MPXV variants are quite large...

Comment by Angus Peart on June 3, 2009 at 3:38am

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.

Comment by James Cohen on June 3, 2009 at 4:18am

Am I right in saying 10hPa is ~200 feet?

Moderator Comment by Sgt Ric on June 3, 2009 at 7:02am

If thats correct, it's of little use here.

Comment by Jason Larocque on June 3, 2009 at 7:28am

If on a standard day, P(@0m)=101,3 kPa and , T(@0m)=15'C :

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 !!!

Moderator Comment by Sgt Ric on June 3, 2009 at 9:01am

Or in a hole your plane just made!

Comment by Jason Larocque on June 3, 2009 at 9:27am

lol !

Do you know any other altimeter device usable in UAVs, other than using the GPS ?

Comment by KokomoJoe on June 3, 2009 at 9:49am

Also this thing has low resolution 10 bits. Although if the thing was repeatable it still could be used for relative measurements.

Comment by Jack Crossfire on June 3, 2009 at 10:20am

Dean could make it sense the rise in the etching on a quarter.

Moderator Comment by Sgt Ric on June 3, 2009 at 10:37am

Yah, that;s a thought... I wonder what his take on this is?

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