Due to their high representation and importance in industry, differential pressure transducers must show accurate readings and be moderate according to the strictest requirements and methods to meet applications standards. Also differential pressure transducers are used in almost all branches of the process industry. They are used to measure the flow of various fluids and to measure the level of liquids in tanks of various purpose and operating pressures. In this paper, it was necessary to design a measuring line for calibration of differential transducers of all types. The calibration line consists of two standardized pressure gauges, a pressurized nitrogen tank, a conecting pipe, a coarse and fine regulator, a vlaves and a reading display device. This paper describes a moderate differential pressure transducer manufactured by Endress&Hauser. The transducer is intended for use in the pressure range from 0 to 70 bar and the applied pressure difference up to a maximum value of 16 bar for safety reasons. The measurement was performed under controlled conditions in the Laboratory for Process Measurements (LPM) of the Faculty of Mechanical Engineering and Naval Architecture in order to prove the accuracy of the readings according to two methods. The first measurement was performed according to the standard B method described in guideline DKD R6-1 and the pressure was applied only on one side of the transducer. Only the deadweight piston gauge was included in the first measurement as a standard with known weights to see what readings we have. The second measurement was performed based on the pressure difference applied by the deadweight piston gauge as the first standard and Druck DPI-615 as the second standard for the purpose of checking the readings on the transducer. After the measurements were performed and the results were printed the calculation of certain values was approached and in order to prove the accuracy of the instrument. In order to facilitate the presentation of the calculated measurement uncertainties, a graphical presentation of the results was used, on the basis of which a conclusion was made.