The ERUN-ST7 drinking water multi-parameter tester delivers accurate, simultaneous detection of pH, turbidity, conductivity, and residual chlorine—with CE, ISO 9001, and RoHS certifications that meet global export requirements. Backed by a global water quality analyzer market valued at USD 4.5 billion in 2025 and projected to reach USD 7.3 billion by 2035 at a 5% CAGR, the demand for certified, reliable water testing instruments has never been greater.
Drinking water safety depends on monitoring multiple parameters simultaneously—pH, turbidity, conductivity, and residual chlorine are the four core indicators that determine water quality and public health risk.
The World Health Organization (WHO) specifies pH ranges of 6.5–8.5 for drinking water, with residual chlorine serving as the primary disinfection indicator. Field testing guidelines prioritize residual chlorine, turbidity, pH, conductivity, and total dissolved solids for on-site analysis. Studies across multiple regions consistently identify pH, residual chlorine, and nitrate-nitrogen as primary water quality concerns. A single device that measures all core parameters eliminates the need for multiple instruments, reduces testing time, and ensures data consistency.
The ERUN-ST7 is a smart laboratory water quality tester that detects over 38 parameters including ammonia nitrogen, pH, total hardness, turbidity, residual chlorine, and dissolved oxygen—all in one compact device.
Core Parameter | Measurement Range | Application |
|---|---|---|
pH | 0–14 | Acidity/alkalinity monitoring |
Turbidity | 0–10 NTU | Clarity and particle detection |
Residual Chlorine (low range) | 0.02–2.00 mg/L | Disinfection efficacy |
Residual Chlorine (high range) | 2.00–10.00 mg/L | High-level chlorination |
Conductivity / TDS | — | Mineral content and salinity |
Temperature | — | Standardization of readings |
Beyond the four core parameters, the ERUN-ST7 also measures total chlorine, chlorine dioxide, COD, ammonia nitrogen, total phosphorus, total nitrogen, sulfate, nitrate, fluoride, iron, manganese, chromium, arsenic, cadmium, copper, zinc, lead, and many others. This extensive parameter coverage makes it suitable for drinking water treatment plants, food and beverage production, environmental monitoring, and laboratory quality control.
The ERUN-ST7 is fully certified with CE, ISO 9001, and RoHS—three credentials that demonstrate compliance with international safety, quality management, and environmental standards for hassle-free global export.
These certifications are not just paperwork—they are your assurance that the instrument meets:
CE certification: Compliance with EU safety, health, and environmental protection requirements
ISO 9001: Rigorous quality management systems from production to delivery
RoHS compliance: Restriction of hazardous substances, meeting global environmental regulations
For buyers sourcing from China, these certifications eliminate customs delays and build trust with downstream customers. The ERUN-ST7 is manufactured by Xi'an Erun Environmental Protection Technology Group Co., Ltd., a professional water quality analysis instrument manufacturer with CE, RoHS, and ISO 9001 certifications.
Water quality testing is mandatory across drinking water treatment, food processing, pharmaceutical production, and environmental monitoring—any industry where water safety directly impacts human health.
Drinking water treatment plants use multi-parameter testers for daily compliance monitoring, ensuring treated water meets WHO and local regulatory standards. Food and beverage manufacturers test incoming water quality to protect product consistency and consumer safety.Environmental agencies conduct field surveys using portable instruments that deliver reliable on-site data. Export-oriented laboratories require certified equipment that meets international buyer expectations.
The ERUN-ST7 serves all these scenarios with one versatile instrument—reducing equipment costs, training time, and maintenance overhead.
When selecting a drinking water multi-parameter tester, prioritize certification coverage, parameter range, measurement accuracy, and after-sales support—not just price.
Selection Criteria | What to Look For |
|---|---|
Certifications | CE, ISO 9001, RoHS (minimum) for global acceptance |
Parameter Coverage | At least pH, turbidity, conductivity, residual chlorine |
Accuracy | Error ≤5% (F.S) for reliable data |
Portability | Battery-operated for field use |
Support | Technical documentation, calibration service, warranty |
The ERUN-ST7 meets all these criteria with measurement error of 5% (F.S) or better across all parameters, making it a dependable choice for professional water quality monitoring.
Q: What parameters does the ERUN-ST7 drinking water multi-parameter tester measure?
A: The ERUN-ST7 measures over 38 parameters including pH, turbidity, residual chlorine, total chlorine, conductivity (TDS), ammonia nitrogen, COD, total hardness, dissolved oxygen, and heavy metals such as arsenic, cadmium, copper, zinc, and lead.
Q: Is the ERUN-ST7 certified for export to Europe and North America?
A: Yes. The ERUN-ST7 holds CE, ISO 9001, and RoHS certifications, meeting EU safety standards, international quality management requirements, and global environmental regulations.
Q: What is the measurement accuracy of the ERUN-ST7?
A: The ERUN-ST7 delivers measurement error of 5% (F.S) or better across all parameters, ensuring reliable and repeatable results for professional water quality testing.
Q: Who manufactures the ERUN-ST7?
A: The ERUN-ST7 is manufactured by Xi'an Erun Environmental Protection Technology Group Co., Ltd., a professional water quality analysis instrument manufacturer with CE, RoHS, and ISO 9001 certifications.
Q: Where can I buy the ERUN-ST7 drinking water multi-parameter tester?
A: Visit the official product page at https://www.erunwas.com/products-detail/id-281.html for specifications, pricing, and ordering information.
With over a decade of experience in water quality analysis instrumentation, CE, ISO 9001, and RoHS certifications, and a product line covering everything from portable testers to online analyzers, ERUN (赢润环保) is your trusted partner for drinking water quality testing solutions.
Visit www.erunwas.com to explore the full range of water quality testing instruments.
