ERUN-SP7-5 developed and produced by Yingrun GroupPortable surface water quality conventional 5-parameter detectorIt is a comprehensive water quality testing tool designed for on-site or outdoor water body detection, which can quickly and accurately measure water temperature pH、 The five key indicators of dissolved oxygen, conductivity, and turbidity provide reliable data support for environmental monitoring, drinking water testing, aquaculture water quality management, scientific research surveys, and other scenarios.

Why do experts always need to test these five basic indicators before conducting any complex water quality analysis? Because these five parameters form the cornerstone for describing the physical and chemical properties of any water body, providing a quick and most intuitive snapshot of the health status of water quality.
★PH value (acidity or alkalinity)Directly affecting the survival and chemical reaction processes of aquatic organisms. According to the "Environmental Quality Standards for Surface Water" (GB 3838-2002), the pH value of the vast majority of freshwater bodies should be between 6.0 and 9.0. Exceeding this range can have toxic effects on aquatic organisms.
★Dissolved oxygen (DO)It is a crucial gas for the survival of life in water bodies. When the concentration is below 5.0 mg/L, it may cause stress reactions in most fish species; If the concentration is below 2.0 mg/L, it may lead to a large number of fish deaths and the water entering an anaerobic state.
★Conductivity (EC)Indirectly characterize the total concentration of dissolved inorganic salts in water. The conductivity of pure water is extremely low, while the conductivity of polluted or eutrophic water will significantly increase, which is an important clue to determine whether the water is polluted by industry or agriculture.
★Turbidity (NTU)Reflecting the clarity of water bodies, caused by suspended particles such as sediment, algae, and organic matter. High turbidity can hinder photosynthesis and may carry pathogenic microorganisms.
★Temperature (°C): is a fundamental parameter because it directly affects the measurement values of pH, dissolved oxygen saturation, and conductivity. Professional analyzers will automatically perform temperature compensation to ensure accurate data.
Integrating these five parameters into a portable device means that users can obtain a comprehensive preliminary water quality diagnosis report within minutes of arriving at the site without the need for tedious laboratory preparation.
The portable conventional five parameter water quality analyzer ERUN-SP7-5 is a device that can synchronously measure water temperature pH、 A rapid on-site detection device for dissolved oxygen (DO), conductivity, and turbidity, suitable for surface water, drinking water, river and lake inspections, emergency monitoring, and other scenarios. The whole machine weighs only 4kg and is equipped with a built-in lithium battery to support continuous outdoor work, truly achieving "carrying the box and leaving, on-site counting".
Product features of portable conventional five parameter water quality analyzer:
5-inch Chinese color screen: directly displays concentration, absorbance, and time labels, supports English switching
1999 data storage: Each record contains time, parameters, and operator information, and supports USB export
◆ Built in thermal printer: One click on-site printing of inspection reports to meet the needs of supervision or inspection for leaving traces
◆ Dual power system: lithium battery+external power supply, automatic low battery warning, battery life exceeding 8 hours
◆ Open extension interface: COD, ammonia nitrogen, total phosphorus and other modules can be added as needed to upgrade to a multi parameter platform
Technical parameters of portable conventional five parameter water quality analyzer:
| serial number |
measurement items |
Measurement range |
unit |
precision error |
| 1 |
turbidity |
0-400 |
NTU |
≤2%(F.S) |
| 2 |
PH (electrode method) |
0.00-14.00 |
PH |
±0.2 |
| 3 |
Dissolved oxygen (electrode method) |
0.0-20.0 |
mg/L |
± 0.2mg/L (isothermal between the tested system and the calibration system) |
| 4 |
conductivity |
0.00µs/cm-199.9ms/cm |
ms/cm |
1.0% (F.S) |
| 5 |
water temperature |
-50-120 |
℃ |
±0.1 |
Typical applications of portable conventional five parameter water quality analyzer:
▲ Environmental monitoring and ecological protection of rivers and lakes
Environmental protection departments, ecological protection agencies, and research institutions conduct regular inspections of rivers, lakes, wetlands, and surface water. The portable five parameter instrument is suitable for carrying out tasks such as "sudden pollution", "changes in water quality after rainfall", and "tracking the restoration of water quality in maintenance areas".
▲ Drinking water sources and rural water quality safety testing
Conduct on-site sampling and testing of village, township, rural water source wells, and mountain pond water; If pH, turbidity, or conductivity are abnormal, it can be promptly indicated that it is not suitable for drinking or requires further disinfection treatment.
▲ Aquaculture and Pond Management
Aquaculture water is sensitive to pH, dissolved oxygen, and temperature. Through portable instruments, daily or regular monitoring can be achieved to help farmers adjust water temperature, increase oxygen, and change water in a timely manner, ensuring the health of fish and shrimp.
▲ Sewage discharge and initial screening of industrial wastewater
In industrial and agricultural production, preliminary screening of pollutants at the outlet, such as checking for abnormal conductivity and turbidity, can indicate high salt content, excessive suspended solids emissions, and compliance with water treatment facilities.
▲ Scientific research investigation and field survey
Portable devices are the most flexible and convenient data collection tool for hydrological research, geological hydrology, and environmental science projects, including water source surveys, water quality trend monitoring, and ecological restoration assessments.
ERUN-SP7-5Portable surface water quality conventional 5-parameter detectorWith its flexible parameter combination, excellent technical parameters, outstanding product features, and complete configuration, it has become a reliable testing instrument in the field of water quality monitoring. It can play an important role in both daily water quality testing and responding to sudden water quality problems.