GreenPrima Aqualysis 800 Online Water Hardness Analyzer

Overview

The GreenPrima Aqualysis 800 is a fully automated, online water hardness analyzer engineered for continuous or interval-based monitoring of calcium and magnesium ion concentration—expressed as CaCO₃ equivalence—in industrial and regulated water streams. It operates on the principle of endpoint colorimetric titration, where a standardized chelating reagent (typically EDTA-based) is precisely dosed into a conditioned water sample; the stoichiometric reaction is monitored via high-stability photometric detection at a defined wavelength. The instrument determines total hardness by measuring the volume of titrant required to reach a sharp color transition, calibrated against NIST-traceable standards. Designed for unattended operation in demanding environments—including boiler feedwater systems, pharmaceutical purified water loops, cooling towers, and municipal softening plants—the Aqualysis 800 delivers metrologically sound results with minimal operator intervention and no requirement for lab-grade analytical expertise.

Key Features

• Automated titration cycle with integrated reagent dosing, sample conditioning, photometric endpoint detection, and waste handling—all within a single compact enclosure (400 × 300 × 180 mm, 4 kg)
• Programmable measurement intervals from 1 to 360 minutes, or triggered externally via digital input (IN1/IN2) or flow pulse signal
• Dual digital inputs for process synchronization and four programmable relay outputs (250 V AC / 4 A) for alarm signaling, pump control, or valve actuation
• High-resolution color LCD display supporting multiple hardness units: °dH (German degrees), °f (French degrees), ppm CaCO₃, and mmol/L
• Low reagent consumption and extended maintenance intervals—typical service cycle exceeds 6 months under standard operating conditions
• Robust IP65-rated housing suitable for installation in utility corridors, pump rooms, and outdoor enclosures with ambient temperatures from 10°C to 40°C
• Comprehensive onboard diagnostics including reagent level monitoring, photometer stability checks, tubing occlusion detection, and error logging with timestamped event history

Sample Compatibility & Compliance

The Aqualysis 800 is validated for use with clarified, non-turbid water samples meeting specified physicochemical constraints: pH 4–10, Fe < 3 ppm, Cu < 0.2 ppm, Al < 0.1 ppm, Mn < 0.2 ppm. Sample temperature must remain between 5°C and 40°C, and inlet pressure should be maintained at 1–2 bar (maximum 5 bar). Its measurement methodology aligns with established titrimetric principles referenced in ISO 6059 (Water quality — Determination of hardness — Titrimetric method) and ASTM D1126-22 (Standard Test Method for Hardness in Water). While not inherently 21 CFR Part 11 compliant, the device supports audit-ready data integrity when integrated with validated SCADA or LIMS platforms that implement electronic signature, change control, and secure user access protocols per GMP/GLP requirements.

Software & Data Management

Data acquisition and configuration are managed via the front-panel interface or remotely through Modbus RTU over RS485. All measurements, calibration events, fault logs, and system status parameters are stored internally with time/date stamps and retained for up to 30 days (circular buffer). Analog output (4–20 mA, max. 750 Ω load) provides real-time hardness values to DCS or PLC systems. Optional integration with GreenPrima’s MCS-series multi-channel selector enables seamless expansion to 2–8 independent sampling points without additional analyzers—ideal for centralized softener monitoring or multi-loop pharmaceutical water distribution networks. Firmware updates are performed via USB port using signed binary packages to ensure version traceability.

Applications

• Real-time hardness control in steam boiler feedwater systems to prevent scale formation and extend heat exchanger service life
• Verification of ion exchange resin breakthrough in water softening skids serving food & beverage, semiconductor, or biopharmaceutical facilities
• Continuous surveillance of recirculating cooling water to optimize antiscalant dosing and minimize blowdown frequency
• Final quality assurance of WFI (Water for Injection) and Purified Water (PW) in USP and EU Annex 1-compliant clean utilities
• Regulatory compliance monitoring for surface water abstraction points and wastewater discharge permits requiring hardness reporting

FAQ

What measurement principle does the Aqualysis 800 employ?
It uses automated colorimetric titration with EDTA-based reagents and photometric endpoint detection, following classical volumetric analysis principles.
Can the instrument operate unattended for extended periods?
Yes—designed for continuous 24/7 operation with automatic self-diagnostics, low reagent consumption, and configurable maintenance alerts.
Is remote configuration and data retrieval supported?
Yes, via RS485 Modbus RTU interface; no proprietary software or cloud dependency is required.
What are the key water quality limitations for reliable operation?
Samples must be free of suspended solids, with pH 4–10 and metal ion interferences below specified thresholds (e.g., Fe < 3 ppm, Cu < 0.2 ppm).
How is calibration performed?
Automatic two-point calibration using factory-prepared standard solutions; user-accessible calibration routines include slope verification and zero adjustment.