The Ammonium Sensor operates based on the ion-selective electrode method for measuring ammonia nitrogen levels. Its principle involves converting ammonia nitrogen ions into ammonium ions. The sensor takes advantage of the fact that ammonium ions can generate hydroxide ions in alkaline solutions. By measuring the concentration of hydroxide ions in the solution, the concentration of ammonia nitrogen can be calculated.

Environmental Protection:

The presence of ammonia nitrogen in water bodies can have significant ecological impacts. High levels of ammonia can be toxic to aquatic life, especially fish and invertebrates. By measuring ammonia nitrogen concentrations, regulatory bodies and environmental scientists can assess the health of aquatic ecosystems and take necessary actions to mitigate pollution. Regular monitoring helps in setting water quality standards and implementing strategies to reduce harmful discharges.

Nutrient Management:

Ammonia nitrogen is a critical nutrient for plant growth, but excessive amounts can lead to eutrophication, a process that causes harmful algal blooms in water bodies. These blooms can deplete oxygen in the water, leading to dead zones where aquatic life cannot survive. Measuring ammonia nitrogen levels allows for better management of fertilizers in agriculture and helps in maintaining a balance in nutrient levels in both agricultural fields and natural water systems.

Wastewater Treatment:

In wastewater treatment facilities, monitoring ammonia nitrogen is vital for optimizing treatment processes. Ammonia is typically found in high concentrations in sewage and industrial effluents. Measuring NH3-N levels helps engineers and operators manage biological treatment processes, such as nitrification and denitrification, ensuring that ammonia is removed effectively before the wastewater is discharged into the environment. This is crucial for meeting regulatory discharge limits and protecting public health.

Indicator of System Performance:

In both natural and engineered systems, the concentration of ammonia nitrogen can serve as an indicator of biological activity and system performance. For instance, in aquaculture, monitoring ammonia levels helps operators maintain a healthy environment for fish. In natural systems, fluctuations in ammonia levels can indicate changes in organic matter decomposition or shifts in microbial populations, offering insights into ecosystem dynamics.

Public Health and Safety:

High levels of ammonia nitrogen in drinking water can pose health risks to humans, particularly for vulnerable populations like pregnant women and infants. Monitoring ammonia levels ensures that water treatment facilities can take appropriate measures to remove contaminants, thus safeguarding public health and ensuring safe drinking water supplies.

Ammonia Nitrogen refers to the nitrogen present in water in the forms of free ammonia (NH3) and ammonium ions (NH4+). Generally, animal-based organic matter contains a higher nitrogen content compared to plant-based organic matter. Nitrogenous compounds in human and animal waste are often unstable and can easily decompose into ammonia. Ammonia nitrogen acts as a nutrient in aquatic environments, potentially leading to a phenomenon known as eutrophication, which causes excessive growth of algae. It is also a major oxygen-depleting pollutant in water bodies, posing a toxic threat to fish and certain aquatic organisms. Regarding human health, ammonia nitrogen can convert into nitrites under specific conditions. Long-term consumption of water with nitrites can result in these compounds combining with proteins to form nitrosamines, which are potent carcinogens and can be extremely detrimental to human health.

From April 21th to 23rd, 2025, IE Expo China 2025 concluded successfully at the Shanghai New International Expo Centre. As a highly anticipated communication platform in the industry, the exhibition attracted exhibitors, experts, scholars, and industry elites from around the world to gather in Shanghai. Through various forms such as cutting - edge technology displays and high - end forum sharing, it created a professional and forward - looking audio - visual feast for the industry.

Suzhou Yosemite Technology Co., Ltd. ("YOSEMITECH"), which has been deeply involved in the water quality monitoring field for over 11 years, always adheres to the mission of "Water Monitoring Made Simple". YOSEMITECH showcased its self - developed water quality monitoring sensors and instruments at the exhibition. As a manufacturer of water quality monitoring sensors, we had in - depth exchanges with domestic and foreign partners and industry peers during the exhibition. It fully demonstrated its profound expertise in areas such as water quality sensor research and development and intelligent monitoring system integration, and continuously empowered global water quality monitoring scenarios with innovative technologies to promote the efficient and intelligent development of the industry.

Y560-A Self-cleaning Ammonia Sensor Calibration

Required equipments and raw materials
Required equipments: three 1000mL beakers, one set of gloves.
Raw materials: 10mg/L ammonium ion electrode standard solution, 100mg/L ammonium ion electrode standard solution and deionized water.

Calibration steps
There are two methods of user calibration for the ammonium ion electrode of the ammonia nitrogen sensor: 1-point calibration and 2-points calibration.
1-point calibration was done in 10mg/L standard solution, 2-points calibration was done in 10mg/L standard solution and 100mg/L standard solution.

1-point calibration step (change the K value)

Step 1: put an appropriate amount of 10mg/L ammonium ion electrode standard solution into a 250mL beaker, add an ionic regulator solution in the corresponding proportion (2% of the total amount of solution).
Step 2: connect the cable to the sensor, remove the sensor protective cover, remove the protective sleeves of the ammonium ion electrode, pH electrode and reference electrode, and then install the sensor protective cover. Put it into the  beaker containing 10mg/L ammonium ion electrode standard solution, and insert the RS485 to USB connector connected to the sensor cable into the computer.
Step 3: open the SmartPC software on the computer, then click “Calibrate”, and click “Get” under the “Manual Calibration” interface to get the initial K and B values of the sensor. Under the “Automatic Calibration” interface, change the “Single/First Point Calibration Value” to 10, click “1 points” to do one-point calibration, wait for the values in the pop-up window to stabilize, and click “OK” to complete the calibration. Click “Get” to check whether the K value is written correctly.
Step 4: click “Start” under the “NH4-N” interface to get the real-time measurement of the pH、NH4+、NH4-N and temperature, check that the NH4+ is close to 10mg/L to verify that the one-point calibration is successful.

2-points calibration step (change the K and B values)

Step 1: put an appropriate amount of 10mg/L ammonium ion electrode standard solution into beaker, add an ionic regulator solution in the corresponding proportion (2% of the total amount of solution). Put an appropriate amount of 100mg/L ammonium ion electrode standard solution into beaker, add an ionic regulator solution in the corresponding proportion (2% of the total amount of solution).
Step 2: connect the cable to the sensor, remove the sensor protective cover, remove the protective sleeves of the ammonium ion electrode, pH electrode and reference electrode, and then install the sensor protective cover. Put it into the  beaker containing 10mg/L ammonium ion electrode standard solution, and insert the RS485 to USB connector connected to the sensor cable into the computer.
Step 3: open the SmartPC software on the computer. Under the “Automatic Calibration” interface, change the “Single/First Point Calibration Value” to 10, change the “Second Point Calibration Value” to 100, click “2 points” to do two-points calibration, wait for the values in the pop-up window to stabilize, and click “OK”. Then clean the sensor with distilled water or deionized water, wipe it dry and put it into the beaker containing 100mg/L ammonium ion electrode standard solution, wait for the values in the pop-up window to stabilize, and click “OK” to complete the calibration. Click “Get” to check whether the K and B values are written correctly.
Step 4: click “Start” under the “NH4-N” interface to get the real-time measurement of the pH、NH4+、NH4-N and temperature, check that the NH4+ is close to 100mg/L, then clean the sensor with distilled water or deionized water, wipe it dry and put it into the beaker containing 10mg/L ammonium ion electrode standard solution, check that the NH4+ is close to 10mg/L to verify that the two-points calibration is successful.

Y561-A NH4-N ammonia sensor calibration

Required equipments and raw materials
Required equipments: three 1000mL beakers, one set of gloves.
Raw materials: 10mg/L ammonium ion electrode standard solution, 100mg/L ammonium ion electrode standard solution and deionized water.

Calibration steps
There are two methods of user calibration for the ammonium ion electrode of the ammonia nitrogen sensor: 1-point calibration and 2-points calibration.
1-point calibration was done in 10mg/L standard solution, 2-points calibration was done in 10mg/L standard solution and 100mg/L standard solution.

1-point calibration step (change the K value)

Step 1: put an appropriate amount of 10mg/L ammonium ion electrode standard solution into a 250mL beaker, add an ionic regulator solution in the corresponding proportion (2% of the total amount of solution).
Step 2: connect the cable to the sensor, remove the sensor protective cover, remove the protective sleeves of the ammonium ion electrode, pH electrode and reference electrode, and then install the sensor protective cover. Put it into the  beaker containing 10mg/L ammonium ion electrode standard solution, and insert the RS485 to USB connector connected to the sensor cable into the computer.
Step 3: open the SmartPC software on the computer, then click “Calibrate”, and click “Get” under the “Manual Calibration” interface to get the initial K and B values of the sensor. Under the “Automatic Calibration” interface, change the “Single/First Point Calibration Value” to 10, click “1 points” to do one-point calibration, wait for the values in the pop-up window to stabilize, and click “OK” to complete the calibration. Click “Get” to check whether the K value is written correctly.
Step 4: click “Start” under the “NH4-N” interface to get the real-time measurement of the pH、NH4+、NH4-N and temperature, check that the NH4+ is close to 10mg/L to verify that the one-point calibration is successful.

2-points calibration step (change the K and B values)

Step 1: put an appropriate amount of 10mg/L ammonium ion electrode standard solution into beaker, add an ionic regulator solution in the corresponding proportion (2% of the total amount of solution). Put an appropriate amount of 100mg/L ammonium ion electrode standard solution into beaker, add an ionic regulator solution in the corresponding proportion (2% of the total amount of solution).
Step 2: connect the cable to the sensor, remove the sensor protective cover, remove the protective sleeves of the ammonium ion electrode, pH electrode and reference electrode, and then install the sensor protective cover. Put it into the  beaker containing 10mg/L ammonium ion electrode standard solution, and insert the RS485 to USB connector connected to the sensor cable into the computer.
Step 3: open the SmartPC software on the computer. Under the “Automatic Calibration” interface, change the “Single/First Point Calibration Value” to 10, change the “Second Point Calibration Value” to 100, click “2 points” to do two-points calibration, wait for the values in the pop-up window to stabilize, and click “OK”. Then clean the sensor with distilled water or deionized water, wipe it dry and put it into the beaker containing 100mg/L ammonium ion electrode standard solution, wait for the values in the pop-up window to stabilize, and click “OK” to complete the calibration. Click “Get” to check whether the K and B values are written correctly.
Step 4: click “Start” under the “NH4-N” interface to get the real-time measurement of the pH、NH4+、NH4-N and temperature, check that the NH4+ is close to 100mg/L, then clean the sensor with distilled water or deionized water, wipe it dry and put it into the beaker containing 10mg/L ammonium ion electrode standard solution, check that the NH4+ is close to 10mg/L to verify that the two-points calibration is successful.