Despite the prevalence of ortho-and pyrophosphate in biochemistry, operationally simple and versatile high-throughput methodologies for their quantification are lacking. We herein introduce PUB, a module for phosphate detection by continuous UV-spectroscopic monitoring of 5-bromouridine phosphorolysis. The PUB module employs cheaply available, bench-stable reagents and can be employed for continuous and discontinuous reaction monitoring in biochemical assays to detect (pyro-)phosphate concentrations spanning almost four orders of magnitude, as demonstrated with representative use-cases.