Leveraging our proprietary lock-in amplifier core technology combined with microfluidics, we have developed a miniaturized, low-cost weak signal workstation. As a core module for rapid antimicrobial susceptibility testing, this device overcomes the drawbacks of traditional testing equipment, which are bulky and expensive, achieving a highly integrated design that significantly reduces manufacturing and usage costs to only 10% of comparable overseas products. It efficiently performs drug resistance and antimicrobial susceptibility testing, delivering accurate results in just 3-5 hours. Adapted for rapid clinical anti-infection diagnosis and treatment scenarios, it provides a cost-effective technical solution for the large-scale deployment of susceptibility testing equipment and precision clinical medication.