Platform scale installed on a car trailer, intended for weighing livestock, one at a time, on-field or in various livestock breeding places. These platform scales are robust and precise weighing systems, intended for weighing in heavy work environments: humidity and dirtiness. Scales are equipped with a solid platform, its surface made of painted steel reinforcement and with a highly accurate digital weight indicator, with a function of digitally filtering the animal's movements in order to achieve the fastest results. The load (weight) measurement is done with the use of 4 load cells which send the weight measured to the indicator via a 3 m long shielded cable (standard length). The weighing system has The weighing system has a function for compensating the tilting of the trailer, as well as a function for compensating the gravitational gradient depending on the working area. These platform scales are made in conformity with OIML R76 and EN45501 regulations regarding non-automatic weighing devices.