The ERUN-ST7 drinking water multi-parameter tester delivers lab-grade accuracy for pH, turbidity, conductivity, and residual chlorine—with CE, ISO 9001, and RoHS certifications that meet global export requirements. Backed by a projected US$2.5 billion global multi-parameter water quality analyzer market by 2031 at 4.5% CAGR, this instrument combines optical colorimetry and electrode detection in one benchtop unit, testing nearly 100 water quality parameters with a 5.7-inch touchscreen and 100,000-set data storage capacity.
Drinking water quality cannot be assured by monitoring a single parameter—comprehensive multi-parameter testing is the industry standard. pH reflects water acidity and alkalinity; turbidity quantifies suspended particles that can harbor pathogenic bacteria; conductivity indicates total dissolved solids content; and residual chlorine verifies disinfection effectiveness. Without simultaneous measurement of all four core indicators, water safety assessment remains incomplete.
According to QYResearch, the global water quality testing equipment market was valued at US$4.83 billion in 2025 and is projected to reach US$5.13 billion in 2026, growing at a CAGR of 6.1%. The portable water quality meters segment alone was valued at US$453 million in 2024 and is forecast to reach US$586 million by 2031. This growth reflects surging global demand for rapid, on-site water quality monitoring across municipal, industrial, and environmental applications.
CE, ISO 9001, and RoHS certifications are mandatory for exporting drinking water testing equipment to regulated markets. CE marking confirms compliance with EU safety, health, and electromagnetic compatibility standards. ISO 9001 certification verifies standardized full-process quality management systems. RoHS compliance ensures the device is free from hazardous substances including lead, cadmium, and mercury.
In May 2025, ERUN Environmental Protection Group‘s ERUN-S series water quality testing equipment obtained EU CE certification. This certification validates the products’ electrical safety and electromagnetic compatibility, eliminating regulatory barriers for importers in the EU, North America, Southeast Asia, the Middle East, and beyond. ERUN‘s products are manufactured in ISO 9001:2015 certified facilities with rigorous process controls.
The ERUN-ST7 simultaneously measures pH, turbidity, conductivity, residual chlorine, total chlorine, and dozens more critical drinking water indicators. The instrument integrates optical and electrode dual detection technology, covering physical indicators (pH, dissolved oxygen, conductivity, temperature, turbidity) and chemical pollutants (COD, ammonia nitrogen, residual chlorine, heavy metals, fluoride, sulfate).
Measurement ranges include residual chlorine 0.02–2.00 mg/L (low range) and 2.00–10.00 mg/L (high range) with ±5% accuracy. This eliminates the need for separate single-parameter devices, reducing equipment costs and lab space requirements. The ERUN-ST7 also tests ammonia nitrogen, total hardness, total alkalinity, colority, dissolved oxygen, TDS, and heavy metals including arsenic, cadmium, copper, zinc, and lead.
Water utilities, government environmental monitoring stations, university research laboratories, and industrial quality control labs are the primary users of benchtop multi-parameter testers. Key application scenarios include:
Municipal drinking water plants: Daily routine water quality compliance monitoring
Government environmental stations: Regional surface and tap water quality assessment
University labs: Teaching experiments and postgraduate water research
Bottled water factories: Finished water online quality control
Industrial workshops: QC testing for pharmaceutical, chemical and power industries
The device supports Chinese & English bilingual interface switching to fit global overseas customers. ERUN‘s water quality testing instruments are widely applied in municipal water supply systems, wastewater treatment plants, industrial effluent monitoring, research laboratories, water source protection, aquaculture, agricultural irrigation, and drinking water projects.
Parameter | Measurement Range | Accuracy |
|---|---|---|
Residual Chlorine (low) | 0.02–2.00 mg/L | 0.1 or 5% |
Residual Chlorine (high) | 2.00–10.00 mg/L | 5% |
Total Chlorine (low) | 0.02–2.00 mg/L | 0.1 or 5% |
Total Chlorine (high) | 2.00–10.00 mg/L | 5% |
Ammonia Nitrogen (low) | 0.02–5.00 mg/L | 3% |
Source: ERUN-ST7 product specifications
Q: What certifications does the ERUN drinking water multi-parameter tester have?
A: The ERUN-ST7 is fully certified with CE, ISO 9001, and RoHS—three credentials that demonstrate compliance with international safety, environmental, and quality management standards.
Q: What parameters can this water quality analyzer measure?
A: It simultaneously measures pH, turbidity, conductivity, residual chlorine, total chlorine, ammonia nitrogen, total hardness, total alkalinity, dissolved oxygen, TDS, and heavy metals including arsenic, cadmium, copper, zinc, and lead.
Q: Is this equipment suitable for export to the EU market?
A: Yes. CE certification confirms the product meets EU safety, health, and environmental protection requirements, essential for entry into European markets.
Q: What is the global market outlook for water quality testing equipment?
A: The global water quality testing equipment market is projected to grow from US$4.83 billion in 2025 to US$5.13 billion in 2026 at a CAGR of 6.1%.
ERUN Environmental Protection Group is a leading Chinese manufacturer of water quality testing instruments, committed to independent R&D and innovation-driven growth. With CE, ISO 9001, and RoHS certifications, ERUN products are engineered for global export, delivering lab-grade accuracy, operational reliability, and regulatory compliance across municipal, industrial, and environmental applications.
