A method for contact filling at least one article with a pourable product, comprising the steps of: i) arranging a mouth of said article in contact with a filling body, which defines a first fluidic line for said pourable product; ii) filling said article, by creating a fluidic connection between said first fluidic line and said article; and iii) measuring a level reached by said pourable product inside said article, during said step ii); said step iii) comprising the step iv) of measuring a first physical quantity (V1, V2) associated to the empty volume of said article; said step iv) being carried out during step ii); said step iv) comprising the step v) of measuring a second physical quantity (p1, p2) associated to the pressure inside said empty volume; said step iv) comprising the step vi) of measuring a third physical quantity (p2-p1) associated to the temporal variation of the pressure inside said empty volume; characterized in that said step vi) comprises the step vii) of measuring a fourth physical quantity (Δt) associated to time interval necessary to obtain a given increase (p2-p1) in the pressure inside said empty volume, during said step ii); said method further comprising the steps of: viii) allowing the escape of an aeriform contained inside said article along a second fluidic line (24, 25), during said step ii); and ix) measuring said third quantity (p1, p2) along said second fluidic line (24, 25); said step vi) comprising the step x) of cyclically interrupting the flow of said aeriform along said second fluid line (24, 25). i) arranging a mouth of said article in contact with a filling body, which defines a first fluidic line for said pourable product; ii) filling said article, by creating a fluidic connection between said first fluidic line and said article; and iii) measuring a level reached by said pourable product inside said article, during said step ii); said step iii) comprising the step iv) of measuring a first physical quantity (V1, V2) associated to the empty volume of said article; said step iv) being carried out during step ii); said step iv) comprising the step v) of measuring a second physical quantity (p1, p2) associated to the pressure inside said empty volume; said step iv) comprising the step vi) of measuring a third physical quantity (p2-p1) associated to the temporal variation of the pressure inside said empty volume; characterized in that said step vi) comprises the step vii) of measuring a fourth physical quantity (Δt) associated to time interval necessary to obtain a given increase (p2-p1) in the pressure inside said empty volume, during said step ii); said method further comprising the steps of: viii) allowing the escape of an aeriform contained inside said article along a second fluidic line (24, 25), during said step ii); and ix) measuring said third quantity (p1, p2) along said second fluidic line (24, 25); said step vi) comprising the step x) of cyclically interrupting the flow of said aeriform along said second fluid line (24, 25). viii) allowing the escape of an aeriform contained inside said article along a second fluidic line (24, 25), during said step ii); and ix) measuring said third quantity (p1, p2) along said second fluidic line (24, 25); said step vi) comprising the step x) of cyclically interrupting the flow of said aeriform along said second fluid line (24, 25).