Abstract: Measurement of cladding material of tinplate with a 8098 microprocessor as inrelligent component has been developed.This instrument is constructed by using STD bus master and is operted on chinese character menu heet on CRT and peron-mechine conversation.Potential transition is measured by eletrolytic ionization method.Thickness of ladding mterial of tinplate is calculated by using the date of electrolytic curent and time.