For industrial water quality monitoring, the ERUN‑C3B online chloride ion sensor delivers accurate real‑time chloride measurement across a 1.8~35500ppm range with full CE, ISO 9001 and RoHS certifications—making it a trusted choice for global water treatment applications.
Chloride monitoring is essential for drinking water safety, wastewater treatment compliance, boiler water corrosion control, and aquaculture health management. With the global chloride ion meter market projected to grow at 4.4% CAGR through 2035, choosing the right sensor matters more than ever.
A high‑performance online chloride ion sensor must deliver wide measurement range, high accuracy, stable real‑time output, and international certification for global deployment.
The ERUN‑C3B online chloride ion sensor measures chloride concentrations from 1.8 to 35,500 ppm with 0.001 ppm resolution and ±5% FS accuracy. This wide range covers everything from ultrapure water traces to highly concentrated industrial wastewater. The sensor uses a solid‑state membrane ion‑selective electrode (ISE) technology, which provides faster response and lower maintenance compared to liquid membrane alternatives.
CE, ISO 9001 and RoHS certifications are non‑negotiable for international water quality equipment—they prove product safety, quality management, and environmental compliance for global markets.
ERUN‑C3B holds CE certification (EU safety standards), ISO 9001 (quality management system), and RoHS compliance (restriction of hazardous substances). These certifications ensure your chloride ion analyzer meets regulatory requirements across North America, Europe, and Asia. Many international buyers now require all three certifications as minimum entry criteria.
Parameter | Specification |
Measurement Range | 1.8~35,500 ppm |
Resolution | 0.001 ppm |
Accuracy | ±5% FS |
pH Range | 2~12 pH |
Temperature Range | 0~50.0°C |
Temperature Compensation | Automatic |
Sensor Type | Solid‑state membrane ISE |
Repeatability | ±3% |
Pressure | 0~1 bar |
Housing Material | ABS |
Cable Length | 5m (standard) |
Process Connection | M39×1.5 |
Installation | Flow‑through |
Output | 4~20 mA three‑wire system |
Communication | RS485 |
Power Supply | DC 9~30V |
IP Rating | IP68 |
Certifications | CE, ISO 9001, RoHS |
[Source: ERUN‑C3B product specifications]
The IP68 waterproof rating allows submersion in harsh environments, while the RS485 communication supports Modbus integration with existing SCADA systems.
Online chloride ion sensors are most critical in drinking water treatment, wastewater management, boiler water corrosion prevention, and aquaculture—where chloride levels directly impact safety, equipment life, and regulatory compliance.
Drinking Water: Chloride monitoring ensures compliance with WHO and EPA drinking water standards. High chloride indicates potential contamination or inadequate treatment.
Wastewater Treatment: Chloride levels affect discharge permits and treatment efficiency. Real‑time monitoring enables immediate corrective action.
Boiler Water: Chloride causes pitting corrosion in boilers and pipelines. Continuous monitoring prevents costly equipment failure.
Aquaculture: Chloride imbalances stress aquatic life. The sensor's 0.001 ppm resolution detects minute changes before they become critical.
Pharmaceutical & Biological Industries: Ultra‑pure water requires strict chloride control.
Automatic temperature compensation (ATC) eliminates measurement errors caused by temperature fluctuations—ensuring accurate chloride readings regardless of water temperature changes.
The ERUN‑C3B features built‑in automatic temperature compensation across 0~50.0°C. Without ATC, chloride ISE readings can drift significantly with temperature changes. This built‑in compensation means you get reliable data whether monitoring cold source water or warm industrial discharge.
Q: What is the difference between a chloride ion sensor and a chlorine sensor?
A: Chloride ion sensors measure dissolved chloride ions (Cl⁻) in water, while chlorine sensors measure free or total chlorine (disinfectant residual). They serve different purposes—chloride for corrosion/contamination monitoring, chlorine for disinfection control.
Q: Can this sensor be used for seawater monitoring?
A: Yes. The 1.8\35,500 ppm range covers seawater chloride levels (\19,000 ppm). The solid‑state membrane design handles high ionic strength environments.
Q: What maintenance does the sensor require?
A: Solid‑state ISE sensors require minimal maintenance—periodic cleaning and occasional calibration. The rugged ABS housing and IP68 rating reduce fouling and damage risks.
Q: How long is the sensor cable? Can it be extended?
A: Standard cable length is 5 meters. Extension may be possible depending on signal integrity requirements—consult technical support for specific needs.
Q: What output options are available?
A: Both 4~20 mA analog (three‑wire) and RS485 digital (Modbus) outputs are supported, allowing integration with most PLCs, data loggers, and SCADA systems.
Q: Is the sensor compatible with third‑party analyzers?
A: Yes. The standard 4~20 mA and RS485 outputs enable compatibility with most industrial water quality analyzers and control systems.
ERUN Group—your trusted partner for CE‑certified online water quality sensors, delivering precision and reliability to water treatment professionals worldwide.
