FIELD: measurement technology. SUBSTANCE: invention is related to measurement of humidity of natural gas by method determining temperature of dew point of moisture content ( 
). Proposed device makes it feasible to diminish content of vapors of higher hydrocarbons till temperature of dew point of higher hydrocarbons becomes equal to temperature of dew point of moisture content. It is achieved by installation of condensation filter ahead of hygrometer which presents metal plate cooled by means of thermoelectric unit to temperature of upper limit of value of temperature of dew point of moisture content, i. e to value 
+ΔT, where ΔT is measurement error of 
. Carrying out consistent measurements of temperature of dew point of moisture content and making temperature that should be set on condensation plate more accurate one strives for considerable decrease of measurement error of temperature of dew point of moisture content. EFFECT: decreased measurement error. 2 dwg
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