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HDC1080: PTFE membrane

Part Number: HDC1080

My customer currently use sensor from - HTU21DF from TE connectivity  (former Sensirion / Measurement specialists).
I want offer pin2pin replacement from TI - HDC1080.
But no only one obstacle there - HTU21DF have PTFE membrane http://www.te.com/usa-en/product-CAT-HSC0004.html?q=HTU21DF. I can't found nothing similar from TI. All our solution hasn't any protection membrane.
Does TI plan to release a new version with PTFE membrane? Or how we can protect our sensors?