The PGXD series of power gen LVDTs have 2 Viton double shaft seals between the core rod and the LVDT housing. The housing is sealed into the connections block condulet, which also uses a silicone rubber gasket inside its cover. The conduit boss for the connections cable on the condulet has a female 3/4-14 NPT thread with a 1/2-14 NPT male-female thread adapter inserted into it. If the conduit or fitting for the connections cable, including the conduit adapter if utilized, is installed with a water-tight sealant, then these LVDT sealings will prevent ingress of water into the bore of the LVDT or into the connections condulet. However, if the cable fitting is not waterproof, or has not been installed into the condulet with a sealant, then the conduit threads by themselves likely won't seal against falling or splashed rain water.
Can a PGHD or PGSD LVDT withstand being inundated with rain water?