Aripta, T.P., Suciyati, S.W., Supriyanto, A. and Junaidi, J. 2022. Prototype Measuring Levels of Dissolved Ammonia Based on TSL2561 Sensor Calibrated Thermo Scientific Genesys 30 Visible Spectrophotometer. Journal of Energy, Material, and Instrumentation Technology. 3, 3 (Aug. 2022), 89–98. DOI:https://doi.org/10.23960/jemit.v3i3.110.