Product Overview
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.
Measurable Indicators of the Drinking Water Quality Tester
This multi-parameter water quality analyzer simultaneously measures pH, turbidity, conductivity, residual chlorine, total chlorine, and dozens more critical drinking water indicators. The ERUN-ST7 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.
Three Core Export Certifications
CE, ISO 9001, and RoHS certifications are mandatory for exporting drinking water testing equipment to regulated markets.
CE marking: Comply with EU safety, health and EMC standards
ISO 9001 certification: Standardized full-process quality management system
RoHS compliance: Free of hazardous substances including lead, cadmium and mercury
According to industry procurement standards, these three certifications are essential for government agencies, laboratories, and water utilities when sourcing water quality instrumentation. ERUN's products are manufactured in ISO 9001:2015 certified facilities with rigorous process controls.
Significance of Multi-Parameter Detection for Drinking Water Safety
Drinking water quality cannot be assured by monitoring a single parameter—comprehensive multi-parameter testing is the industry standard.
pH: Reflect water acidity and alkalinity
Turbidity: Quantify suspended particles that easily breed pathogenic bacteria
Conductivity: Indicate total dissolved solids content
Residual chlorine: Verify disinfection effect
The ERUN-ST7 tests all four core indicators simultaneously, plus ammonia nitrogen, total hardness, total alkalinity, colority, dissolved oxygen, TDS, and heavy metals including arsenic, cadmium, copper, zinc, and lead. This fully conforms to global drinking water standards and supports regulatory report submission for municipal water plants and public health authorities.
Target Users & Application Scenarios
Core User Groups
Water utilities, government environmental monitoring stations, university research laboratories, and industrial quality control labs are the primary users of this benchtop multi-parameter tester.
Key Application Scenarios
Municipal drinking water plants: Daily routine water quality compliance monitoring
Government environmental stations: Regional surface & 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.
Full Technical Specifications
Source: ERUN-ST7 product specifications
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% (F.S) |
Ammonia Nitrogen (high) |
5.00–25.00 mg/L |
3% (F.S) |
COD (low range) |
5–200 mg/L |
5% |
COD (high range) |
200–2000 mg/L |
5% |
Total Hardness |
— |
5% |
Sulfate |
5–200 mg/L |
5% |
Fluoride |
0.05–2.0 mg/L |
5% (F.S) |
Nitrate (nitrogen) |
0.02–10.0 mg/L |
0.1 or 5% |
Advantages vs. Single-Parameter Testing Instruments
A multi-parameter water quality analyzer reduces costs, saves lab space, and unifies testing standards compared to maintaining separate single-parameter instruments.
Traditional labs need independent devices for colorimetric chemical testing and electrode physical testing. ERUN-ST7 integrates both detection technologies into one bench unit, realizing synchronous measurement of physical indexes and chemical pollutants and lowering daily operation & maintenance difficulty.
Built-in 250+ factory pre-calibration curves
Support 3,500+ editable user custom curves, adaptable to diverse water samples
100,000 groups data storage with timestamp & operator ID, convenient for audit and compliance filing
Why Choose ERUN as Your Water Testing Equipment Supplier
ERUN Environmental Protection Technology Group Co., Ltd. has focused on water quality monitoring instruments since 2009, with CE, ISO 9001, and RoHS certifications that open global export markets.
Headquartered in Xi’an, China, ERUN owns professional R&D teams, standardized production workshops and strict ISO 9001:2015 quality control system. All water analyzers pass RoHS inspection, adopting harmless raw materials to cut pollution in production, usage and scrapping links.
Our products are widely supplied to municipal water treatment, industrial quality control, aquaculture, environmental monitoring and other sectors worldwide.
Product Closing Introduction
ERUN-ST7 Multi-Parameter Drinking Water Tester — CE, ISO 9001 & RoHS certified. Lab-grade accuracy for pH, turbidity, conductivity, residual chlorine and 90+ more parameters. Export-ready.
Learn more about ERUN-ST7 →
