GreenPrima B sens660 Online Residual Chlorine Analyzer
| Brand | GreenPrima |
|---|---|
| Origin | Switzerland |
| Manufacturer | GreenPrima AG |
| Type | Online Analyzer |
| Measurement Principle | Amperometric Electrochemical Sensor (Constant Potential Method) |
| Measuring Parameter | Free Residual Chlorine |
| Range | 0–2.000 ppm / 0–20.00 ppm |
| Accuracy | ≤ ±2% of Full Scale |
| Repeatability | ±0.001 ppm / ±0.01 ppm |
| Resolution | 0.001 ppm / 0.01 ppm |
| Detection Limit | 0.001 ppm / 0.01 ppm |
| Temperature Compensation | –10 to 130 °C (Automatic or Manual) |
| Operating Temperature | 0–70.0 °C |
| Storage Temperature | –20 to 70 °C |
| Display | Backlit Graphic LCD (Chinese & English) |
| Data Storage | 600,000 records |
| Power Supply | 90–260 VAC, 50/60 Hz or 24 VDC optional |
| Analog Outputs | Dual 4–20 mA (Residual Chlorine & Temperature), Max. Loop Resistance 500 Ω, Accuracy 0.1% FS |
| Cleaning Output | Adjustable Interval (0.1–1000 h) and Duration (1–1000 s) |
| Enclosure Rating | IP65 |
| Controller Dimensions | 144 × 144 × 106 mm |
| Electrode Dimensions | Ø12 × 120 mm |
| Mounting | Wall-, Panel-, or Pole-Mounted Controller |
Overview
The GreenPrima B sens660 Online Residual Chlorine Analyzer is a high-stability, maintenance-free amperometric sensor system engineered for continuous, real-time monitoring of free residual chlorine in potable water distribution systems. It operates on the constant-potential (amperometric) electrochemical principle: a precisely controlled voltage is applied between a gold-ring working electrode and a stable reference electrode; hypochlorous acid (HOCl) and hypochlorite ion (OCl⁻) undergo selective reduction at the gold surface, generating a current linearly proportional to their concentration. This method eliminates dependence on reagents, optical path length, or colorimetric interferences—making it inherently robust for turbid, low-conductivity, or organically laden water matrices typical of municipal supply networks, hospital loops, and swimming pool recirculation systems.
Key Features
- Gold-ring amperometric sensor (B sens660) optimized for sub-ppm detection sensitivity and long-term zero stability—no membrane replacement or internal electrolyte refilling required.
- Integrated flow cell (BAF615) ensures laminar, constant-velocity sample delivery, minimizing boundary layer effects and enhancing measurement reproducibility.
- Self-contained controller with dual 4–20 mA analog outputs (residual chlorine + temperature), RS485 Modbus RTU interface, and programmable cleaning cycle control.
- Auto-compensated temperature measurement (–10 to 130 °C range) with configurable compensation algorithm aligned with EPA Method 334.0 and ISO 7393-2 hydrodynamic response profiles.
- IP65-rated enclosure with modular mounting options (panel, wall, pole) and PG13.5 thread compatibility for rapid field installation into existing bypass lines or inline manifolds.
- Onboard data logging (600,000 timestamped records) with UTC synchronization support, enabling traceable trend analysis compliant with GLP and drinking water utility reporting frameworks.
Sample Compatibility & Compliance
The B sens660 is validated for use in potable water streams with pH 4.0–8.5, conductivity ≥50 µS/cm, and suspended solids < 50 mg/L. It meets performance criteria specified in EN 15279:2012 (electrochemical sensors for disinfectant monitoring) and supports regulatory adherence to WHO Guidelines for Drinking-water Quality (4th ed.), US EPA 40 CFR Part 141.54, and EU Council Directive 98/83/EC. Its reagent-free operation eliminates hazardous chemical handling, aligning with OSHA HAZCOM and CLP classification requirements. The system architecture supports audit-ready data integrity per FDA 21 CFR Part 11 when paired with validated SCADA or LIMS integration.
Software & Data Management
The embedded firmware supports configuration via local keypad or remote Modbus RTU commands. All calibration events, cleaning cycles, and alarm states are logged with operator ID (if enabled), timestamp, and raw sensor output. Exportable CSV files include calibrated concentration, mV signal, temperature, and diagnostic flags (e.g., low-flow alert, electrode aging index). Optional PC-based configuration utility (GreenPrima ConfigTool v3.x) enables batch parameter deployment across multi-sensor networks and generates PDF-formatted calibration certificates traceable to NIST-traceable chlorine standards.
Applications
- Municipal drinking water treatment plants: post-disinfection point-of-contact monitoring and chlorination feedback control.
- Distribution network pressure zones: early detection of chlorine decay or nitrification hotspots.
- Healthcare facilities: continuous surveillance of sterile water for irrigation (SWI) and dialysis feedwater per AAMI/ISO 13959:2014.
- Commercial swimming pools & spas: automated dosing control integrated with ORP and pH analyzers.
- Food & beverage production: rinse water validation in HACCP-critical zones where chlorine residuals must be verified hourly.
FAQ
Does the B sens660 require daily calibration?
No. Field calibration is recommended every 7–30 days depending on water matrix stability; factory calibration remains valid for up to 12 months under normal operating conditions.
Can it measure combined chlorine (chloramines)?
No. The B sens660 is optimized exclusively for free residual chlorine (HOCl/OCl⁻); combined chlorine requires separate DPD-based photometric analysis per Standard Methods 4500-Cl G.
Is temperature compensation automatic or manual?
Both modes are supported. Automatic compensation uses an integrated Pt1000 RTD; manual mode accepts user-input temperature for legacy installations lacking probe integration.
What flow rate is required in the BAF615 flow cell?
Optimal laminar flow is achieved at 0.3–1.5 L/min; the cell includes built-in flow restriction to maintain consistent velocity across variable mainline pressures.
How is sensor fouling mitigated?
The system executes periodic electrochemical cleaning pulses during scheduled intervals, oxidizing organic deposits from the gold surface without mechanical wipers or chemical agents.
