The safety light curtain sensor system is a newly developed high-quality automatic control product using infrared scanning detection technology. The transmitting device and the receiving device are installed on both sides, and the internal digital control is controlled by the single-chip microcomputer, so that the infrared transceiver unit forms an infrared light curtain guarding barrier under the condition of high-speed scanning. When people and objects enter the screen area of the light curtain, the control system rapidly switches The output level signal, so that the load action, when people and objects leave the light curtain alert area, the load will automatically shut down to achieve safety protection purposes.