Choosing the right differential pressure sensor can significantly impact accuracy, efficiency, and long-term operating costs. This article compares the modern, wireless Ellenex PDT2 with the traditional Dwyer Magnehelic gauge, highlighting key differences in precision, data integration, installation, and scalability. While the Magnehelic remains a reliable mechanical option for simple visual monitoring, the PDT2 stands out with high accuracy, low-power operation, and seamless