Phages are hard-to-detect bacteria viruses, crucial for understanding microbial ecosystems. We aim to characterise phage presence and abundance by developing a portable, low-cost, open-source instrument for microfluidic droplet ddPCR based on a UC2 light sheet microscope. This tool will democratise access to phage quantification, advancing research in diagnostics, ecology, and phage therapy, transforming our understanding of viral infections.