The Agasthya 2021 series Online Ammonia-nitrogen/ Total nitrogen Analyzer BI 1320 is measuring NH4-N/TN in evaluating water quality, protecting ecosystems, and ensuring compliance with environmental standards. It provides crucial information for effective water management and pollution control measures. Ammonium Ion sensor is solid membrane ion selective electrodes, used to test ammonium ions in water, which can be fast, simple, and accurate.