GreenPrima Aqualysis800A Total Alkalinity Analyzer

Overview

The GreenPrima Aqualysis800A Total Alkalinity Analyzer is an automated, benchtop-grade online titrimetric analyzer engineered for continuous or interval-based quantification of total alkalinity (as CaCO₃) in aqueous process streams. It operates on the principle of potentiometric acid–base titration coupled with colorimetric endpoint detection—specifically optimized for carbonate/bicarbonate/hydroxide buffering systems prevalent in industrial water treatment. Unlike single-point pH-based estimation methods, the Aqualysis800A delivers stoichiometrically rigorous alkalinity values by precisely dispensing standardized sulfuric or hydrochloric acid while monitoring pH shift and chromogenic response in real time. This dual-signal verification ensures high reproducibility (< ±2% RSD at 50–500 mg/L CaCO₃) and robustness against matrix interferences such as turbidity, residual chlorine, or moderate organic load. Designed for unattended operation in demanding environments—including boiler feedwater systems, ion exchange regeneration loops, and closed-loop cooling towers—the instrument meets functional requirements for ISO 9001-certified water management programs and supports compliance with ASTM D1067 (Standard Test Methods for Acidity or Alkalinity of Water) and EN ISO 9963-1.

Key Features

• Integrated titration module with micro-dosing peristaltic pumps and precision glass electrode + photometric sensor fusion for unambiguous endpoint determination
• Programmable measurement intervals from 1 to 360 minutes, configurable via front-panel interface or remote command
• Compact footprint (400 × 300 × 180 mm; 4 kg) enabling installation in control cabinets, skid-mounted systems, or laboratory utility zones
• Dual programmable digital inputs for external trigger signals (e.g., pump status, flow switch activation)
• Four relay outputs configurable as alarm, maintenance alert, or actuator control (e.g., acid dosing valve, sample solenoid)
• Onboard data logging with timestamped results, diagnostic events, and error codes retained for ≥30 days
• Standard analog output (4–20 mA, isolated) and RS485 Modbus RTU interface for integration into SCADA, DCS, or LIMS platforms
• Low reagent consumption: ≤1.2 mL of 0.1 N acid per analysis; optional reagent level monitoring with visual/relay alert

Sample Compatibility & Compliance

The Aqualysis800A accepts liquid samples within a temperature range of 5–40 °C and conductivity up to 2,000 µS/cm. It is validated for use with clarified, low-turbidity waters typical of softened boiler feed, reverse osmosis permeate, cooling tower blowdown, surface water pretreatment effluent, and pharmaceutical purified water (PW) per USP . The system complies with electromagnetic compatibility standards IEC 61326-1 and safety requirements IEC 61010-1. Its firmware architecture supports audit-trail-enabled operation per FDA 21 CFR Part 11 when deployed with compliant host software—facilitating GLP/GMP-aligned recordkeeping in regulated manufacturing facilities.

Software & Data Management

Local configuration and calibration are performed via a tactile membrane keypad with LCD display. Full remote access—including method editing, calibration history review, and firmware updates—is supported through Modbus RTU over RS485. Logged data (alkalinity value, pH curve timestamp, reagent volume consumed, system health flags) can be exported in CSV format via USB port. Optional GreenPrima MCS-Series multiplexer modules enable seamless expansion to 2–8 independent sample streams without additional analyzers—each channel retaining individual calibration schedules and alarm thresholds. All stored events include ISO 8601 timestamps and are non-erasable unless explicitly cleared via administrator-level authentication.

Applications

• Real-time monitoring of cation exchange resin breakthrough in softening systems
• Feedback control of acid dosing in neutralization basins prior to wastewater discharge
• Verification of alkalinity removal efficiency across lime-soda ash treatment trains
• Process validation during clean-in-place (CIP) cycles in biopharmaceutical utilities
• Trend analysis of carbonate alkalinity drift in recirculating cooling systems to preempt scale formation
• Compliance reporting for municipal and industrial pretreatment programs under NPDES permits

FAQ

What standard does the Aqualysis800A use for alkalinity quantification?
It follows the acid titration methodology aligned with ASTM D1067 and ISO 9963-1, reporting results as mg/L CaCO₃ equivalent.
Can the analyzer operate without continuous sample flow?
Yes—it supports discrete batch analysis with manual or automated sample introduction; flow-through mode is optional.
Is third-party software required for data export?
No—CSV export is native via USB; Modbus integration allows direct ingestion into existing plant historians without middleware.
How often is recalibration recommended?
Initial calibration is performed with certified NIST-traceable alkalinity standards; field verification is advised every 7–14 days depending on sample matrix stability.
Does the system support automatic cleaning cycles?
It includes programmable rinse steps between analyses using deionized water or buffer, but does not integrate ultrasonic or chemical cleaning subsystems.