No, the ATMOS 14 sensor chip/board is not removable. The Teflon and Screen could be replaced. Contact METER for information. Long-term drift is stated in the manual. The ATMOS 14 shouldn’t need to be checked for drift until two years of field use. There are instructions in the manual about checking relative humidity drift. The cost to recalibrate ATMOS 14 sensors at METER is about $100-$120.
How do I assemble the anemometer mast?
The anemometer mast is suitable to mount METER’s above-ground sensors: ATMOS 41, ATMOS 22, ATMOS 14, PAR, PYR, IRT, SRS, PHYTOS 31, ECRN-100, ECRN-50, and ECT. For assembly, read: "Anemometer Mast Assembly Instructions."