The American ECM air-fuel ratio analysis module AFM1000 is a tool for calibrating and monitoring closed-loop control of electronic and carburetor gasoline engines. It uses a wide range UEGO oxygen sensor directly installed on the engine exhaust pipe, and the installation operation is extremely simple. The AFM1000 kit includes: sensors, connecting cables, control module, installation sleeve, bolts, and instructions. Linearized analog output of 0V to 5V, which can be easily connected to any data acquisition or engine control system. AFM1000 has the characteristics of wide measurement range, high accuracy, fast response, and light weight, making it an effective tool for automotive engine development.