The ERUN-SZ-3085S online water hardness analyzer delivers laboratory-grade total hardness monitoring for boiler feedwater and water softening systems, with CE, ISO 9001, and RoHS certifications – ensuring compliance, reliability, and operational efficiency.
Water hardness is one of the most critical parameters in industrial water treatment. Scale formation from calcium and magnesium in boiler feedwater reduces heat transfer efficiency, increases fuel costs, and leads to equipment failures. For water softening systems, hardness breakthrough indicates exhausted resin and signals the need for regeneration.
The ERUN-SZ-3085S online hardness analyzer solves this challenge with automated titration colorimetry – the industry's most reliable method for total hardness measurement.
The ERUN-SZ-3085S is a fully automated online hardness analyzer that employs titration colorimetry to deliver ±5% accuracy across a 0.20–500 ppm CaCO₃ measurement range, with CE, ISO 9001, and RoHS certifications.
Titration colorimetry is the preferred method for industrial hardness monitoring due to its precision and stability. Unlike conductivity-based sensors that measure total dissolved ions indirectly, titration colorimetry directly quantifies calcium and magnesium concentrations through a reagent-based color change reaction. This method provides superior specificity and repeatability – the ERUN-SZ-3085S achieves ±5% repeatability of the selected reagent's upper limit.
With CE certification (electromagnetic compatibility per EN 61000 series), ISO 9001 quality management, and RoHS compliance, this analyzer meets the rigorous standards required for export to EU markets and industrial facilities worldwide.
The ERUN-SZ-3085S offers a measurement range of 0.20–500 ppm CaCO₃ with seven interchangeable reagent types, an analysis time of approximately 3 minutes, and flexible continuous or interval measurement modes.
Specification | Detail |
|---|---|
Measurement Principle | Titration Colorimetry |
Range | 0.20–500 ppm CaCO₃ (7 reagent types) |
Accuracy | ±5% of selected reagent upper limit |
Repeatability | ±5% of selected reagent upper limit |
Analysis Time | ~3 minutes |
Measurement Mode | Continuous / Interval (5–30 min) / External trigger |
Water Consumption | 1–2 L per analysis |
Output | 0/4–20 mA, 750Ω max; 2-channel relay |
Power Supply | 24 VDC, 25 W (220 VAC adapter optional) |
Protection Rating | IP54 |
Dimensions | 250 × 360 × 110 mm; ~2.5 kg |
Key features include: automatic measurement and cleaning, backlit graphic LCD with bilingual menu, external signal input for start/stop control, optional RS485 Modbus communication, and optional SD card data storage for historical data and fault logs.
The seven reagent types allow users to match the analyzer to their specific hardness range requirements – from ultra-low 0.2–2.00 ppm (ERUN-TH4201) up to 50.0–500 ppm (ERUN-TH4207).
The ERUN-SZ-3085S is specifically designed for continuous hardness monitoring in water softening systems, boiler feedwater, boiler water, circulating water, and process water applications.
In water softening applications, the analyzer monitors treated water hardness to detect resin exhaustion and trigger regeneration cycles. Softened water should typically contain less than 1 gpg (17.1 mg/L) hardness – the ERUN-SZ-3085S's low-range reagent options (0.2–2.00 ppm and 0.5–5.00 ppm) provide the sensitivity needed to verify softening performance.
Scale formation in boilers is directly linked to feedwater hardness. By providing continuous, real-time hardness data, the ERUN-SZ-3085S enables operators to maintain water chemistry within recommended limits, preventing scale buildup, reducing fuel costs, and extending equipment service life. The analyzer's 4–20 mA output and relay alarms allow integration with plant DCS or SCADA systems for automated control responses.
For process water, cooling water, and reclaimed water applications, the analyzer provides reliable hardness data to support quality control and regulatory compliance.
The ERUN-SZ-3085S holds CE certification (electromagnetic compatibility), ISO 9001 certification (quality management), and RoHS compliance (restriction of hazardous substances) – the three credentials most demanded by international industrial buyers.
CE certification confirms the analyzer meets EU safety, health, and environmental protection requirements, including electromagnetic compatibility standards (EN 61000 series) essential for reliable operation in industrial environments with complex electromagnetic interference.
ISO 9001 certification demonstrates our commitment to consistent quality management throughout design, production, and service. RoHS compliance ensures the analyzer is free from restricted hazardous substances, meeting environmental regulations in the EU and other markets.
Additionally, the analyzer's titration colorimetry method aligns with established international standards for hardness determination, including GB/T 6909 and the newly issued GB/T 45131-2025 for boiler water and cooling water analysis methods.
Installing the ERUN-SZ-3085S online hardness analyzer reduces manual testing labor, prevents scale-related downtime, and enables data-driven water treatment decisions.
Traditional hardness testing requires manual sample collection, reagent addition, and visual interpretation – a time-consuming process subject to human error. The ERUN-SZ-3085S automates the entire analysis cycle, from sampling to measurement to cleaning, freeing operators for other tasks.
Scale deposits as thin as 1/32 inch can increase fuel consumption by 2%. Continuous monitoring catches hardness breakthrough early, allowing timely intervention before scale accumulates.
With optional SD card data storage and RS485 Modbus communication, the analyzer provides historical trend data and remote access capability – enabling predictive maintenance and process optimization.
Q: What is the measurement range of the ERUN-SZ-3085S?
A: The analyzer measures 0.20–500 ppm CaCO₃, with seven reagent types allowing users to select the optimal range for their application.
Q: What certifications does this analyzer hold?
A: CE certification (electromagnetic compatibility), ISO 9001, and RoHS compliance.
Q: What is the analysis time?
A: Approximately 3 minutes, depending on water hardness and set rinse time.
Q: Can this analyzer integrate with my existing control system?
A: Yes. It provides 0/4–20 mA analog output, 2-channel relay output, and optional RS485 Modbus communication.
Q: What are the water sample requirements?
A: Colorless, free of suspended particles and bubbles; pH 4–10.5; iron <3 ppm, copper <0.2 ppm, aluminum <0.1 ppm, manganese <0.2 ppm.
Q: How often does the analyzer need maintenance?
A: Minimal maintenance required – automatic cleaning and self-diagnostics reduce manual intervention.
The ERUN-SZ-3085S online water hardness analyzer combines CE, ISO 9001, and RoHS certifications with titration colorimetry precision – delivering reliable, continuous hardness monitoring for boiler water and softening systems. Contact us to discuss your specific application requirements.
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ERUN – Xi'an Erun Environmental Technology Group Co., Ltd. – Your trusted partner in industrial water quality monitoring solutions.
