Overview

Ammonia nitrogen refers to the nitrogen present in water in the form of free ammonia (NH₃) and ammonium ions (NH₄⁺). It commonly originates from the decomposition of nitrogen-containing organic matter in domestic sewage, agricultural runoff with nitrogen fertilizers, and emissions from industries such as fertilizer and cement production. Additionally, ammonia-containing exhaust gases from vehicles can dissolve in water, further contributing to ammonia nitrogen contamination.

Impact on Human Health

Ammonia nitrogen in water can be oxidized into nitrite under specific environmental conditions. Long-term ingestion of nitrite-contaminated water may lead to the formation of nitrosamines—potent carcinogens that pose serious health risks. Continuous exposure increases the risk of chronic diseases related to liver and gastrointestinal function.

Impact on Aquatic Ecosystems

Free ammonia (NH₃) is significantly more toxic to aquatic organisms than ammonium salts. Its toxicity intensifies with increased water temperature and pH levels. Ammonia nitrogen causes both acute and chronic effects on fish and other aquatic species.

Chronic exposure leads to reduced feeding, stunted growth, tissue damage, and impaired oxygen transport. In contrast, acute ammonia poisoning may result in abnormal swimming behavior, loss of equilibrium, convulsions, and eventual death of aquatic life.

Daruifuno’s Online Ammonia Nitrogen Monitoring Solution

To support safe and efficient water quality management, Daruifuno has developed advanced online monitoring tools:

• Ammonia Nitrogen (NH₄-N) Digital Sensor NH351
• Ammonia Nitrogen (NH₄-N) Digital Controller DUC2-NH4

Key Features:

• Based on the ion-selective electrode method
• Real-time online monitoring without the need for reagents or risk of secondary pollution
• Automatic compensation for potassium ions (optional), pH, and temperature
• Simple drop-in installation, no additional sampling device required
• Fast, accurate response without delay
• Equipped with a self-cleaning brush to prevent microbial fouling, reducing maintenance needs
• RS-485 output with MODBUS protocol compatibility

These robust features make Daruifuno’s ammonia nitrogen analyzers ideal for wastewater treatment plants, aquaculture systems, and industrial discharge monitoring. The NH351 sensor, combined with the DUC2-NH4 controller, delivers long-term stable performance and real-time data insights.

About Daruifuno

Daruifuno specializes in the R&D, manufacturing, and sales of online water quality monitoring instruments. Our core product lines include pH ORP analyzers, turbidity sensors, conductivity meters, dissolved oxygen sensors, COD analyzers, and ammonia nitrogen analyzers. For reliable, accurate, and intelligent water quality solutions, Daruifuno is your trusted partner.

Contact us today to learn more about our ammonia nitrogen sensors and how they can improve your water monitoring systems.