A Method, in particular a computer implemented method, of monitoring a condition of at least one object (O J) comprised in a piping system for transporting at least one product, wherein: said piping system comprises a pipe transporting said product(s), each object (O J) comprises at least one surface exposed to said product(s) flowing through said pipe, due to said exposure of said surface(s) to said product(s) each object (O J) is susceptible to an impairment caused by at least one of: accretion, abrasion and/or corrosion, and said piping system is operable in a first mode, wherein said pipe is filled with a first medium, said method comprising the steps of: 1) continuously or repeatedly measuring a resonance frequency (f(t)) over time (t) of an oscillatory element of a vibratory device installed on said pipe, wherein: the vibratory device is foreseen on the piping system in addition to the object(s) (O J), said oscillatory element extends into said pipe and exhibits a susceptibility to an impairment caused by accretion, abrasion and/or corrosion corresponding to the respective susceptibilities of said object(s) (O J), said vibratory device comprises a transducer causing said oscillatory element to oscillate at said resonance frequency and a measurement unit measuring said resonance frequency (f(t)), and said resonance frequency (f(t)) is reduced by accretion and increased by corrosion and by abrasion of said oscillatory element, and 2) providing said measured frequencies (f(t)) and the corresponding measurement times (t) to a calculating unit, and by means of said calculating unit: based on said measured frequencies (f(t)) and said corresponding measurement times (t) determining at least one first time interval, during which said piping system was operated in said first mode and said oscillatory element was immersed in said first medium based on a previously determined or learned model for said determination of said first time intervals, and monitoring said condition of said object(s) (O J) based on said measured frequencies (f M1 (t)) measured during said first time interval(s) and determining and providing at least one monitoring result. 1) continuously or repeatedly measuring a resonance frequency (f(t)) over time (t) of an oscillatory element of a vibratory device installed on said pipe, wherein: the vibratory device is foreseen on the piping system in addition to the object(s) (O J), said oscillatory element extends into said pipe and exhibits a susceptibility to an impairment caused by accretion, abrasion and/or corrosion corresponding to the respective susceptibilities of said object(s) (O J), said vibratory device comprises a transducer causing said oscillatory element to oscillate at said resonance frequency and a measurement unit measuring said resonance frequency (f(t)), and said resonance frequency (f(t)) is reduced by accretion and increased by corrosion and by abrasion of said oscillatory element, and the vibratory device is foreseen on the piping system in addition to the object(s) (O J), said oscillatory element extends into said pipe and exhibits a susceptibility to an impairment caused by accretion, abrasion and/or corrosion corresponding to the respective susceptibilities of said object(s) (O J), said vibratory device comprises a transducer causing said oscillatory element to oscillate at said resonance frequency and a measurement unit measuring said resonance frequency (f(t)), and said resonance frequency (f(t)) is reduced by accretion and increased by corrosion and by abrasion of said oscillatory element, and 2) providing said measured frequencies (f(t)) and the corresponding measurement times (t) to a calculating unit, and by means of said calculating unit: based on said measured frequencies (f(t)) and said corresponding measurement times (t) determining at least one first time interval, during which said piping system was operated in said first mode and said oscillatory element was immersed in said first medium based on a previously determined or learned model for said determination of said first time intervals, and monitoring said condition of said object(s) (O J) based on said measured frequencies (f M1 (t)) measured during said first time interval(s) and determining and providing at least one monitoring result. based on said measured frequencies (f(t)) and said corresponding measurement times (t) determining at least one first time interval, during which said piping system was operated in said first mode and said oscillatory element was immersed in said first medium based on a previously determined or learned model for said determination of said first time intervals, and monitoring said condition of said object(s) (O J) based on said measured frequencies (f M1 (t)) measured during said first time interval(s) and determining and providing at least one monitoring result.