Pollution of the agricultural environment due to the use of chemicals is a serious problem in many countries. Its aim should be to minimize the threat of contamination arising from chemical crop protection. Chemical intervention will only be done properly when it is done with technically efficient equipment. Therefore, it became necessary to introduce certification studies of plant protection equipment. Since 1999 mandatory technical tests of sprayers have been started in Poland. These tests check the serviceability of the sprayer. The legal basis for the system of technical tests of sprayers was the Plant Protection Act.