Cotton farming is a popular agribusiness in Pakistan. About 70% of total pesticides used in the country is sprayed onto cotton crop. Studies indicate that nearly 50% of pesticide sprayed on different crops is lost to untargeted areas, which not only adds to the cost of production but also degrades the surrounding soil, water and air environment. A major reason for such a pesticide loss is use of inefficient spraying machines, which are unable to maintain specified nozzle pressure nozzle discharge, nozzle height that affects spray pattern, droplet size, spray uniformity, etc. The proposed study was therefore conducted using self-leveling boom sprayer. This sprayer can level its boom for a specified nozzle height automatically during spray. Nozzles discharge, spray pattern, spray angle, etc. were measured in the laboratory as well as in the field for pressure setting of 250, 300 and 350 kPA, respectively. The results indicated that the performance of self leveling boom sprayer was better at 350 kPA as compared to other two pressure values.