GreenPrima PM 8202C L Residual Chlorine, Chlorine Dioxide and Ozone Analyzer

Overview

The GreenPrima PM 8202C L is an online amperometric residual disinfectant analyzer engineered for continuous, reagent-free monitoring of free chlorine, total chlorine, chlorine dioxide, and ozone in potable water, wastewater, and industrial process streams. It operates on the constant-voltage amperometric principle—applying a fixed polarization potential across a dual-electrode sensing system (Pt/Pt or Au/Au) to selectively detect electroactive species without chemical reagents or membrane-based electrolytes. This design eliminates consumables, reduces maintenance intervals, and ensures long-term signal stability under variable flow and temperature conditions. The integrated BAF615 constant-flow cell maintains laminar, repeatable hydraulic conditions across the sensor surface—critical for achieving high reproducibility in real-world installations where pressure and flow fluctuations are common. Unlike colorimetric or DPD-based analyzers, the PM 8202C L delivers true real-time measurement with no sample conditioning, no reagent dosing pumps, and no optical path fouling concerns—making it suitable for unattended operation in municipal water distribution networks, hospital sterilization loops, and food & beverage production lines.

Key Features

• Triple-analyte capability: Simultaneous or selectable measurement of free chlorine, chlorine dioxide, and ozone using interchangeable sensor configurations (Bsens650 Pt/Pt or Bsens660 Au/Au)
• Reagent-free, membrane-free operation: No DPD tablets, no electrolyte refills, no membrane replacements—reducing total cost of ownership and operator dependency
• Dual platinum or gold electrode architecture: Engineered for high selectivity and minimal cross-sensitivity to common interferents (e.g., nitrite, bromide, hydrogen peroxide)
• BAF615 precision flow cell: Maintains consistent 150–300 mL/min flow rate independent of upstream pressure variation; includes integrated air bubble detection and automatic flow correction logic
• Full-featured local interface: Backlit graphic LCD with intuitive menu navigation, multilingual support (English/Chinese), password-protected configuration access, and real-time trend display
• Robust analog and digital I/O: Two isolated 4–20 mA outputs (configurable for concentration, temperature, or status), RS485 Modbus RTU protocol, two programmable relay outputs with adjustable hysteresis
• Comprehensive diagnostics: Onboard self-test routines, sensor health monitoring, cleaning cycle logging, and alarm event timestamping with cause-code identification
• Flexible mounting: Wall-mount, panel-mount, or direct pipe-thread (½” NPT) installation options; IP65-rated enclosure for indoor or sheltered outdoor deployment

Sample Compatibility & Compliance

The PM 8202C L is validated for use in drinking water (per WHO Guidelines for Drinking-water Quality and EU Directive 98/83/EC), secondary distribution systems, hospital effluent streams (meeting ISO 15883-1 for washer-disinfector validation), and pharmaceutical purified water loops (aligned with USP and EP 2.2.42). Its amperometric method complies with ASTM D6503-20 (Standard Test Method for Determination of Free Chlorine in Water by Amperometric Titration) and supports GLP/GMP data integrity requirements via time-stamped audit logs, user-access controls, and non-volatile memory retention. All firmware and calibration records are stored internally with tamper-evident timestamps and support export via Modbus register polling for integration into SCADA or LIMS platforms.

Software & Data Management

Data handling is managed through an embedded 600,000-point circular buffer with automatic timestamping (RTC-backed), including measurement value, temperature, sensor current, flow status, cleaning events, and alarm triggers. Configuration and calibration parameters are protected by multi-level password authentication (operator, engineer, administrator). Remote access is supported via Modbus RTU over RS485—enabling integration with industry-standard PLCs (Siemens S7, Allen-Bradley ControlLogix) and SCADA systems (Ignition, WinCC, iFIX). Calibration history—including date, operator ID, standard concentration used, and post-calibration verification error—is retained for regulatory review. Firmware updates are performed via USB or Modbus register upload, with CRC-verified integrity checks prior to installation.

Applications

• Municipal drinking water treatment: Continuous monitoring at chlorination contact tanks, clearwells, and distribution system entry points
• Hospital central sterile supply departments (CSSD): Real-time verification of disinfectant residuals in washer-disinfector rinse cycles and endoscope reprocessing water
• Food and beverage processing: Monitoring chlorine levels in CIP rinse water, bottle rinsing circuits, and process cooling towers
• Pharmaceutical water systems: USP Purified Water and Water for Injection (WFI) loop surveillance per Annex 1 and EU GMP Chapter 4 requirements
• Swimming pool and spa management: Automated control of chlorine dosing based on real-time residual feedback
• Industrial cooling water treatment: Corrosion inhibitor dosing synchronization with biocide residual tracking

FAQ

What electrochemical principle does the PM 8202C L employ?
It uses constant-voltage amperometry with dual working electrodes to generate a diffusion-limited current proportional to oxidant concentration.
Can the same sensor measure chlorine, chlorine dioxide, and ozone simultaneously?
No—sensor configuration must be selected per application; Bsens650 (Pt/Pt) is optimized for chlorine, while Bsens660 (Au/Au) provides enhanced sensitivity and selectivity for ClO₂ and O₃.
Is temperature compensation automatic?
Yes—integrated NTC10K or PT1000 input enables full-range automatic compensation from –10 to 130 °C.
How often does the system require maintenance?
Sensor cleaning is programmable (interval: 0.1–1000 h; duration: 1–1000 s); typical field deployments report 6–12 months between manual inspections.
Does the device meet FDA 21 CFR Part 11 requirements?
While the hardware supports audit-trail-capable data logging, full Part 11 compliance depends on system-level implementation—including electronic signature workflows and secure network architecture.