The portable multi parameter water quality tester is an instrument used for rapid on-site detection of water quality, which can provide measurement results of multiple water quality indicators without the need for complex laboratory equipment. The routine testing items include but are not limited to the physical and chemical properties of water, pollutant content, and water quality safety. The following are the routine testing contents of a portable multi parameter water quality tester:
1. pH value
Meaning: pH value represents the concentration of hydrogen ions in water, which affects the solubility of dissolved gases in water, the toxicity of metal ions, and the growth of organisms in water.
Measurement principle: Measure the concentration of hydrogen ions in water through electrodes and convert it to pH value.
Applicable scenarios: rivers, lakes, industrial wastewater, drinking water, etc.
2. Dissolved oxygen (DO)
Meaning: Dissolved oxygen is the solubility of oxygen in water, which directly affects the growth and survival of aquatic organisms. Low dissolved oxygen content can lead to eutrophication or hypoxia of water bodies, affecting aquatic ecosystems.
Measurement principle: Common methods include polarography and fluorescence, which obtain the dissolved oxygen value by measuring the concentration of oxygen in water.
Applicable scenarios: reservoirs, rivers, aquaculture areas, etc.
3. Conductivity (EC)
Meaning: Conductivity is an indicator of ion concentration in water, reflecting the total dissolved solids (TDS) content of the water. High conductivity indicates that water contains a large amount of dissolved substances, which may be a sign of pollution.
Measurement principle: The conductivity of water is measured by a conductivity sensor, and the conductivity is proportional to the ion concentration in the water.
Applicable scenarios: tap water, industrial wastewater, rivers, etc.
4. Total Dissolved Solids (TDS)
Meaning: TDS represents the total amount of dissolved solid substances in water, including inorganic salts, organic compounds, etc. Excessive TDS can affect the taste of water and may have adverse effects on aquatic organisms.
Measurement principle: By measuring the relationship between conductivity and TDS, the dissolved solid content in water can be indirectly calculated.
Applicable scenarios: drinking water, surface water, wastewater, etc.
5. Turbidity
Meaning: Turbidity refers to the degree to which suspended matter in water scatters light. High turbidity may be caused by algae, bacteria, or other pollutants, affecting the cleanliness of water and water treatment efficiency.
Measurement principle: Determine turbidity by measuring the intensity of scattered light in the water sample.
Applicable scenarios: drinking water, rivers, lakes, etc.
6. Ammonia nitrogen (NH ∝ - N)
Meaning: Ammonia nitrogen is one of the main forms of nitrogen in water. Excessive concentration of ammonia nitrogen is toxic to aquatic organisms and may lead to eutrophication of water bodies.
Measurement principle: Use colorimetric method or ion selective electrode method to measure the concentration of ammonia nitrogen in water.
Applicable scenarios: industrial wastewater, urban sewage, aquaculture water areas, etc.
7. Chemical Oxygen Demand (COD)
Meaning: Chemical oxygen demand represents the content of organic pollutants in water bodies and is an important indicator of the degree of water pollution. The higher the COD value, the more severe the organic pollution in the water.
Measurement principle: Organic matter in water is oxidized by a strong oxidant under acidic conditions, and COD is calculated by measuring the amount of oxidant consumed.
Applicable scenarios: industrial wastewater, domestic sewage, surface water, etc.
8. Chloride (Cl ⁻)
Meaning: Chloride is one of the common soluble salts in water, usually derived from pollution from saltwater, wastewater, or fertilizers. High concentrations of chloride may lead to a decrease in water quality.
Measurement principle: Use ion selective electrode method or colorimetric method to determine the concentration of chloride ions in water.
Applicable scenarios: seawater, urban sewage, agricultural water sources, etc.
9. Phosphate (PO ₄³ ⁻)
Meaning: Phosphorus is one of the main causes of eutrophication in water bodies, and excessive phosphate concentration may lead to the proliferation of algae in water bodies, resulting in algal blooms.
Measurement principle: The concentration of phosphate in water is often determined by colorimetric or chemical methods.
Applicable scenarios: agricultural drainage, lakes, rivers, etc.
10. Nitrate (NO ∝⁻)
Meaning: Nitrates usually come from agricultural fertilization and sewage discharge. Excessive nitrate not only pollutes water bodies, but may also cause the phenomenon of "blue baby syndrome", affecting aquatic organisms and human health.
Measurement principle: Colorimetric method and ion selective electrode method are common measurement methods.
Applicable scenarios: agricultural areas, urban sewage, groundwater, etc.
11. Residual chlorine (FreeChlorine)
Meaning: Residual chlorine is unreacted free chlorine in water, usually used for water disinfection. Its low concentration may indicate insufficient disinfection, while its high concentration may be harmful to the human body.
Measurement principle: Use colorimetric or electrode methods to detect residual chlorine concentration in water.
Applicable scenarios: drinking water, swimming pool water, sewage treatment plants, etc.
Application scenarios of portable multi parameter water quality tester:
Environmental monitoring: Regularly monitor water bodies such as rivers, lakes, wetlands, etc. to grasp the water quality status.
Drinking water monitoring: Ensure that the water quality of tap water, well water, bottled water and other water sources meets national standards.
Industrial wastewater monitoring: Monitor industrial wastewater discharge to ensure that wastewater treatment meets discharge standards.
Agricultural irrigation water monitoring: Monitor harmful substances in farmland irrigation water to ensure the growth environment of crops.
Aquaculture monitoring: Monitor the dissolved oxygen, ammonia nitrogen, pH value and other indicators of aquaculture water to ensure the healthy growth of aquatic products.
Advantages:
Portability: Compact and lightweight, suitable for on-site use.
Real time detection: It can quickly provide test results and detect water quality problems in a timely manner.
Multi parameter measurement: capable of measuring multiple water quality indicators simultaneously, saving time and cost.
Easy operation: Generally, results can be obtained by simply inserting the tester and performing simple operations, which is suitable for non professionals to use.
In summary, portable multi parameter water quality testers provide an efficient and convenient tool for water quality monitoring, widely used in various fields of water quality testing.