A new type of pesticide detection system is designed

aiming at deficiencies of traditional pesticide detecting methods which need large analytical instruments and complicated operation. The basic principle is the color change when colorimetric sensor array occurs cross response to the tested sample. The lower computer of the system is PIC16F877 A microcontroller which assists the upper computer to control the temperature and the flow of the detection. The upper computer of the system completes image acquisition and image processing of the colorimetric sensor array to get the result of the detection. The system is used to experimentally detect 3 different pesticides in the concentration of 0. 1mg / L. Experiment results show that the system can correctly distinguish the 3different pesticides.