Measurement device, in particular a flow meter, in particular an electromagnetic flow meter, for measuring a property, in particular a flow, of a flowing fluid, comprising - a measurement tube comprising an outer tube, made out of metal, and a liner lining an inside of said outer tube, said liner consisting of a thermally insulating material, in particular a rubber or plastic material, and - measurement means for measuring a property of a fluid flowing through the lined measurement tube during measurement operation, characterized in that, - means are foreseen for measuring a temperature gradient (ΔT) across a measurement tube wall of said measurement tube, when said measurement tube wall is exposed to a temperature difference (ΔT L/A) between an ambient temperature (T A) and a fluid temperature (T L) of said fluid, - said means comprise a first temperature sensor (TS 1) for measuring a first temperature (T 1), prevailing on an inner surface of said liner and a second temperature sensor (TS 2) for measuring a second temperature (T 2) prevailing on an outside surface of said outer tube, - said temperature gradient (ΔT) is determined as a difference between the first temperature (T 1) and the second temperature (T 2), - a temperature sensor (TS A) for measuring an ambient temperature (T A) is foreseen, - detecting means for detecting abrasion of said liner are foreseen, detecting abrasion in case a deviation between said measured temperature gradient (ΔT) and a predetermined reference temperature gradient (ΔT ref (ΔT L/A)) representing a temperature gradient across a measurement tube wall exposed to the same or at least a similar temperature difference (ΔT L/A) of an identical measurement tube comprising an unimpaired liner exceeds a predetermined limit, and - said detecting means are designed to determine said temperature difference (ΔT L/A) between said ambient temperature (T A) and said fluid temperature (T A) to be equal to a difference between the ambient temperature measured by said temperature sensor (TS A) for measuring said ambient temperature (T A) and said first temperature (T 1) measured by said first temperature sensor (TS 1). - a measurement tube comprising an outer tube, made out of metal, and a liner lining an inside of said outer tube, said liner consisting of a thermally insulating material, in particular a rubber or plastic material, and - measurement means for measuring a property of a fluid flowing through the lined measurement tube during measurement operation, - means are foreseen for measuring a temperature gradient (ΔT) across a measurement tube wall of said measurement tube, when said measurement tube wall is exposed to a temperature difference (ΔT L/A) between an ambient temperature (T A) and a fluid temperature (T L) of said fluid, - said means comprise a first temperature sensor (TS 1) for measuring a first temperature (T 1), prevailing on an inner surface of said liner and a second temperature sensor (TS 2) for measuring a second temperature (T 2) prevailing on an outside surface of said outer tube, - said temperature gradient (ΔT) is determined as a difference between the first temperature (T 1) and the second temperature (T 2), - a temperature sensor (TS A) for measuring an ambient temperature (T A) is foreseen, - detecting means for detecting abrasion of said liner are foreseen, detecting abrasion in case a deviation between said measured temperature gradient (ΔT) and a predetermined reference temperature gradient (ΔT ref (ΔT L/A)) representing a temperature gradient across a measurement tube wall exposed to the same or at least a similar temperature difference (ΔT L/A) of an identical measurement tube comprising an unimpaired liner exceeds a predetermined limit, and - said detecting means are designed to determine said temperature difference (ΔT L/A) between said ambient temperature (T A) and said fluid temperature (T A) to be equal to a difference between the ambient temperature measured by said temperature sensor (TS A) for measuring said ambient temperature (T A) and said first temperature (T 1) measured by said first temperature sensor (TS 1).