[Dry goods] These sensors are commonly used in water quality detection! Look here!

2022-08-12 14:50


Water quality monitoring is an indispensable link to ensure water safety and water pollution control, and water quality detection parameters provide technical guarantee for water safety and water pollution control. At present, the water quality mainly monitors five conventional water quality parameters, such as pH value, dissolved oxygen, conductivity, turbidity and temperature, as well as monitoring factors that have a greater impact on the natural environment, such as ORP, ammonia nitrogen, residual chlorine, COD, BOD, heavy metals, nitrite nitrate index, total phosphorus and chlorophyll.

In the Outline of Ecological Environment Monitoring Plan (2020-2035), it is proposed that China will achieve the development goal of water environment monitoring in the next 15 years. The outline clarifies the importance of water environment quality monitoring, and further proposes that water quality monitoring will gradually shift to water ecological monitoring, establish a unified surface water environment monitoring network, deepen the monitoring system integrating automatic monitoring and manual monitoring, promote water pollution traceability monitoring, and expand watershed water ecological monitoring. These policy orientations put forward higher requirements for the whole water quality monitoring industry.



PH sensor

The pH water quality sensor is used to detect the hydrogen ion concentration in the tested object and convert it into the corresponding available output signal. The H+in the solution to be measured generates a voltage signal by acting with the electrode of the sensor, and the voltage is proportional to the concentration of H+. The corresponding pH value of the solution can be obtained by measuring the voltage signal.

It is often used for pH measurement in wastewater and sewage, electroplating wastewater, high temperature, fermentation, high pressure and other occasions.


ORP sensor

ORP shows how a single molecule can effectively oxidize another molecule. It is usually used to determine the effectiveness of chemical disinfectors. Its main component is chlorine. ORP sensor can indicate the chlorine concentration that can effectively kill bacteria and prevent microbial growth. It is a measurement indicator of the redox capacity of aqueous solution, and its unit is mv.

ORP is a function of temperature, pressure and solution, so it is easy to be affected by these different variables. At a certain temperature and pressure, the composition of solution has a great impact on ORP, in which pH value has a more obvious impact.

ORP sensors are usually used together with PH sensors, and are widely used in water treatment, environmental protection, chemical, petrochemical, food, pharmaceutical, chip manufacturing and other fields where PH/ORP needs to be measured.


dissolved oxygen

The dissolved oxygen sensor is a sensing device used to measure the dissolved amount of oxygen in water. The oxygen molecule in the solution to be measured passes through the selective film of the sensor, and the corresponding reduction or oxidation reaction takes place on the cathode and anode inside the sensor. At the same time, the current signal is generated. The current is proportional to the concentration of dissolved oxygen. The concentration of dissolved oxygen can be determined by the current.

Dissolved oxygen is usually expressed as one millionth of concentration or mg/l. It can also be expressed as percentage saturation, where saturation is the maximum amount of oxygen that can theoretically be dissolved in water at a given height and temperature.

Dissolved oxygen sensors are widely used in environmental monitoring, aquaculture, sewage treatment, industrial production and other scenarios.


Residual chlorine ozone sensor

Residual chlorine refers to the chlorine remaining in the water after chlorination and contact for a certain period of time. After some reactions with microorganisms and bacteria are removed, the chlorine remaining in the water becomes total residual chlorine, also known as total chlorine, which includes comprehensive residual chlorine and free residual chlorine. The residual chlorine in tap water commonly refers to free residual chlorine.

Residual chlorine, as an effective means of sterilization, is still used by more than 80% of water plants in the world, but more than a certain amount of chlorine will cause a lot of harm to human body. The residual chlorine sensor uses the principle of electrochemical polarography for direct measurement and can display the measurement results in real time.

Residual chlorine sensor is often used in water plant residual chlorine content detection, secondary water supply residual chlorine content monitoring, natatorium water environment monitoring, medical and health and other environments.


Turbidity sensor

Turbidity of water is an important standard to measure whether the water quality is good or not. China is a country with scarce water resources and serious water pollution. Every year, a large amount of untreated sewage is discharged into lakes and rivers. Facing the increasingly severe water environment situation, it is urgent to vigorously improve the level of water quality detection and popularize the strength of water quality monitoring.

Turbidity sensors are widely used in environmental monitoring, secondary water supply, sewage treatment, industrial production and other scenarios.

Noble Technology is a scientific and technological enterprise integrating design, research and development, production, sales and service, focusing on independent research and development of intelligent water quality analyzer, Internet of Things technology and cloud services. The products include PH/ORP, conductivity, dissolved oxygen, residual chlorine, ozone, ion concentration, turbidity, salinity, sludge concentration, COD, ammonia nitrogen and other water quality analyzers, water quality digital sensors, DTU, and Noble Cloud. The company integrates Noble artificial intelligence, big data and cloud technology to build an intelligent Internet of Things platform, provides customers with a multi parameter water quality monitoring system, and helps the development of smart cities, smart agriculture and the industry.