SCXL004DN Differential pressure sensor (0 to 4in H20)

This is super expensive on DigiKey ($85), but it is being sold on electronic goldmine for cheap! $8.95!!)http://www.goldmine-elec-products.com/prodinfo.asp?number=G17180I was thinking of using this for speed measurement instead of the MPXV5004DP, whose pressure range is 0 to 15.8in H20 . The pressure range of the SCXL004DN is much better suited to the dynamic range of differential pressure for measuring speed thru a pitot tube. What do you guys think? This is a very high quality part being sold for a fraction of it's real cost ...

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