Offered have been the methods of conversion and improvement of accuracy of the capacitance and inductive transmitter measuring chains, pritected by the Authorized Certificates. The measuring chains of the capacitance and inductive transmitters, possessing the wide functional abilities and high metrological characteristics have been developed, they are protected by the Autorized Certificates. The measuring chains of the instruments and transmitters have been introduced. The introduction of the obtained results will allow to widen the functional abilities and metrological characteristics of measuring chains and the transmittersAvailable from VNTIC / VNTIC - Scientific & Technical Information Centre of RussiaSIGLERURussian Federatio