Psychrometric wet elements as a basis for precise physico-chemical measurements

Under a ppropriate condi ti ons, psychrometric wet ele me nts of s imple design can be hi ghl y reproduc ibl e in behav ior. A temperature de pression of 10 K ca n be reproduc ibl e from e le ment to el e me nt within i mK. Th e prope rti es of a we t ele me nt can be determined very acc urately by direct compari sons with oth e r wet e le ments in a common a irstream . Compariso ns with one specia ll y de velope d type s how the effects of practical wat er-re ta ining cove rings. Compari sons with a not her type, which s imulates th e fully calc ul a bl e n at-pla te system, the n give the beha vior in a bs olut e te rms.