Is the 9013F compatible with Skydrol?
It is not recommended for Skydrol. Nitrile is the standard material used in diaphragm for the 9013F devices. The 9012G has an option to use ethylene propylene, form Q3, for the diaphragm.
Note that 9012G switches are control devices and cannot support inductive loads directly, but require an interposing contactor.