GreenPrima PM8200CL Chlorine Dioxide Online Analyzer
| Brand | GreenPrima |
|---|---|
| Origin | Switzerland |
| Manufacturer Type | Original Equipment Manufacturer (OEM) |
| Product Category | Imported Instrument |
| Model | PM 8200CL |
| Instrument Type | Online Analyzer |
| Measurement Principle | Amperometric Electrochemical Sensor (Constant Voltage Mode) |
| Measured Parameter | Chlorine Dioxide (ClO₂) |
| Range Options | 0–2.000 ppm and 0–20.00 ppm |
| Accuracy | ≤2% of Full Scale (F.S.) |
| Repeatability | ±0.001 ppm / ±0.01 ppm |
| Resolution | 0.001 ppm / 0.01 ppm |
| Detection Limit | 0.001 ppm / 0.01 ppm |
| Operating Temperature | 0–70 °C |
| Storage Temperature | −20–70 °C |
| Temperature Compensation | −10–130 °C (Manual/Automatic |
| Display | Backlit Graphic LCD |
| Languages | Simplified Chinese, Traditional Chinese, English |
| Data Storage Capacity | 600,000 records |
| Power Supply | 90–260 VAC, 50/60 Hz (24 VDC optional) |
| Analog Outputs | Two isolated 4–20 mA channels (ClO₂ and temperature, max. load 500 Ω) |
| Communication | RS485 Modbus RTU (HART optional) |
| Relay Outputs | Three programmable relays (5 A / 250 VAC / 30 VDC), with independent Hi/Lo alarm points and hysteresis |
| Cleaning Control | Adjustable cleaning interval (0.1–1000 h) and duration (1–1000 s) |
| Enclosure Rating | IP65 |
| Mounting Options | Wall-mounted, panel-mounted, or pipe-mounted (controller) |
| Dimensions (W×H×D) | 144 × 144 × 106 mm |
| Cutout Size | 138 × 138 mm |
| Weight | 0.86 kg |
Overview
The GreenPrima PM8200CL Chlorine Dioxide Online Analyzer is an industrial-grade, continuous-monitoring instrument engineered for precise, stable, and interference-resistant measurement of aqueous chlorine dioxide (ClO₂) concentration in real time. Utilizing a constant-voltage amperometric electrochemical sensor principle, the system operates via a dual-platinum working electrode configuration housed within the Bsens650 ClO₂-specific sensor — optimized for selectivity against common oxidants including free chlorine, chloramines, and ozone. The analyzer integrates seamlessly into water treatment process control loops, delivering high reproducibility under variable pH (4–9), temperature, and flow conditions. Its modular architecture comprises three core components: the PM8200CL controller unit, the Bsens650 amperometric ClO₂ sensor, and the BAF615 precision flow-through cell — ensuring consistent hydrodynamic conditions critical for electrochemical stability and calibration integrity.
Key Features
- Dual platinum amperometric sensing element with proprietary membrane chemistry for enhanced ClO₂ specificity and minimized cross-sensitivity to residual chlorine and dissolved ozone
- Integrated flow regulation via BAF615 flow cell, maintaining laminar, pulse-free sample delivery at 100–300 mL/min — essential for minimizing diffusion-layer variability
- Three programmable relay outputs supporting fail-safe interlocks, dosing pump control, and alarm escalation protocols per site-defined logic
- Two fully isolated 4–20 mA analog outputs assignable to ClO₂ concentration and temperature — compliant with IEC 61000-6-2/4 for electromagnetic immunity in industrial environments
- RS485 Modbus RTU communication protocol enabling integration into SCADA, DCS, and PLC-based supervisory systems; HART interface available as factory option for legacy asset management compatibility
- IP65-rated enclosure with corrosion-resistant polycarbonate housing, suitable for installation in humid, chemically aggressive utility rooms or outdoor kiosks
- Multi-language interface (Simplified Chinese, Traditional Chinese, English) with password-protected configuration access — aligned with ISO/IEC 17025 laboratory security requirements
- Onboard data logging of 600,000 timestamped records (ClO₂, temperature, relay status, calibration events) with automatic timestamp synchronization and cyclic overwrite policy
Sample Compatibility & Compliance
The PM8200CL is validated for use in potable water distribution systems, bottled water production lines, food & beverage processing rinse water, pharmaceutical purified water (PW) loops, and municipal swimming pool circulation systems. It meets operational requirements outlined in EPA Method 300.1 (amperometric determination of oxidants), ASTM D1253-22 (standard test method for residual chlorine), and supports compliance with WHO Guidelines for Drinking-water Quality (4th ed., 2017) and EU Directive 98/83/EC. Temperature compensation employs either NTC10K or PT1000 sensors per user selection, enabling traceable correction across the full −10–130 °C range. All firmware and calibration procedures are designed to support GLP/GMP audit readiness, including electronic signature-capable calibration logs and configurable audit trail retention.
Software & Data Management
The embedded firmware provides non-volatile storage of calibration coefficients, sensor diagnostics (e.g., zero drift, slope stability, membrane integrity flags), and event-driven logging (e.g., alarm activation, relay state change, cleaning cycle execution). Data export is supported via USB mass storage mode (FAT32 formatted drive) or Modbus-polling by external historian software. No cloud dependency or vendor-hosted platform is required — all configuration, calibration, and reporting functions reside locally on the device. Audit trail entries include operator ID (if configured), timestamp (RTC-synchronized), action type, and pre-/post-value deltas — satisfying FDA 21 CFR Part 11 requirements when deployed with appropriate procedural controls.
Applications
- Real-time monitoring of ClO₂ dosage in municipal drinking water disinfection stages, particularly where chlorine dioxide replaces chlorine to minimize trihalomethane (THM) formation
- Continuous verification of residual ClO₂ in bottled water filling lines, ensuring microbiological safety without over-dosing that may impact taste or packaging integrity
- Process control of ClO₂ injection in pharmaceutical clean-in-place (CIP) systems and purified water generation units (USP )
- Swimming pool and spa water management, where simultaneous ClO₂ and free chlorine monitoring enables dynamic oxidation potential balancing
- Industrial cooling tower water treatment, supporting predictive maintenance of biofilm control strategies
FAQ
What electrochemical principle does the PM8200CL employ?
It uses constant-voltage amperometry with a dual-platinum working electrode and a silver/silver chloride reference electrode — optimized for selective reduction of ClO₂ at −600 mV vs. Ag/AgCl.
Can the same sensor measure both chlorine dioxide and free chlorine?
No — the Bsens650 sensor is specifically calibrated and membrane-formulated for ClO₂. A separate Bsens640 sensor is required for free chlorine measurement.
Is temperature compensation automatic or manual?
Both modes are supported: automatic compensation using integrated NTC10K or external PT1000, or fixed-point manual offset entry.
How often does the sensor require recalibration?
Typical field recalibration interval is 7–30 days depending on matrix fouling risk; built-in zero-check and span-check routines reduce downtime.
Does the system support validation documentation per ISO/IEC 17025?
Yes — calibration certificates, sensor traceability records, and firmware version logs are exportable and structured to align with accredited laboratory documentation workflows.
