| http://www.w3.org/ns/prov#value | - The catalytic sensor 12 can be dry, i.e., at ambient humidity levels; or it may be imbibed with high-boiling, low vapor pressure inert solvent, i.e., a polyether, such as polyethylene oxide or polyethylene glycol, or, it may be encapsulated and contain water, salt, acid, alkali, etc.
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