GreenPrima PM 8202I Online Ammonia Nitrogen Analyzer
| Brand | GreenPrima |
|---|---|
| Origin | UK |
| Manufacturer Type | Manufacturer |
| Origin Category | Imported |
| Model | PM 8202I |
| Instrument Type | Online |
| Measurement Principle | Ion-Selective Electrode (ISE) Method |
| Measurement Range | 0.00–20,000 ppm NH₃–N |
| Accuracy | ±0.01 / ±0.1 / ±1 ppm (depending on range) |
| Resolution | 0.01 / 0.1 / 1 ppm |
| Temperature Compensation | –10 to 130 °C (manual/automatic |
| Operating Temperature | –10 to 70.0 °C |
| Storage Temperature | –20 to 70.0 °C |
| Display | Backlit large-dot-matrix LCD |
| Data Storage | 600,000 records |
| Power Supply | 90–260 VAC, 50/60 Hz or optional 24 VDC |
| Output | Two isolated 4–20 mA outputs (max. loop resistance 500 Ω, accuracy 0.1% FS) |
| Communication | RS485 Modbus RTU |
| Cleaning Control | Adjustable interval (0.1–1000 h) and duration (1–1000 s) |
| Alarm Outputs | Two independent Hi/Lo relay outputs (5 A / 250 VAC / 30 VDC) |
| Enclosure Rating | IP65 |
| Mounting Options | Wall-mounted, pipe-mounted, panel-mounted |
| Dimensions (W×H×D) | 144 × 144 × 108 mm |
| Panel Cutout | 138 × 138 mm |
| Weight | 0.87 kg |
Overview
The GreenPrima PM 8202I Online Ammonia Nitrogen Analyzer is an industrial-grade, continuous monitoring instrument engineered for reliable quantification of ammonia nitrogen (NH3–N) in aqueous matrices using the ion-selective electrode (ISE) principle. Unlike colorimetric or spectrophotometric methods, the PM 8202I employs a dedicated Bsens730 ammonia-selective electrode that responds selectively to unprotonated ammonia (NH3) in equilibrium with ammonium ions (NH4+), delivering real-time concentration data across a broad dynamic range (0.00–20,000 ppm). The system integrates temperature compensation via either NTC30K or PT1000 sensors, ensuring thermodynamic correction of electrode potential per the Nernst equation. Designed for deployment in demanding environmental and process water applications, the analyzer operates autonomously with minimal reagent consumption—eliminating the need for chemical reagents, optical components, or flow cells typical of wet-chemistry analyzers.
Key Features
- Triple-sensor compatibility: Supports simultaneous or sequential integration of Bsens710 (fluoride), Bsens720 (chloride), and Bsens730 (ammonia nitrogen) ISEs within a single controller platform—enabling multi-parameter water quality surveillance without hardware duplication.
- Rugged IP65-rated enclosure: Fully sealed against dust and low-pressure water jets, suitable for outdoor installation, wastewater treatment plant environments, and industrial utility corridors.
- Intuitive dual-language interface: Large backlit dot-matrix LCD displays real-time NH3–N concentration, measured temperature, system time, relay status, and calibration history—navigable via tactile keypad in English or Chinese.
- Dual isolated 4–20 mA analog outputs: Configurable to transmit either NH3–N concentration or temperature signal, each with full-scale accuracy of ±0.1% and loop resistance support up to 500 Ω—compatible with DCS, PLC, and SCADA systems.
- Modbus RTU over RS485: Enables standardized digital communication for remote configuration, data polling, and firmware updates—supporting integration into centralized asset management platforms compliant with ISA-95 or ISO 50001 frameworks.
- Programmable maintenance logic: Automatic electrode cleaning cycles (adjustable from 0.1 to 1000 hours interval; 1–1000 seconds duration) reduce biofouling and extend electrode service life—critical for long-term unattended operation in raw sewage or cooling tower applications.
Sample Compatibility & Compliance
The PM 8202I is validated for continuous measurement in municipal drinking water, secondary and tertiary effluent, industrial process water, and recirculating cooling systems. Its ISE-based architecture tolerates moderate turbidity, suspended solids, and organic load—provided sample conditioning (e.g., filtration or pH stabilization) aligns with ISO 7888 and ASTM D1426 guidelines for ammonia nitrogen determination. While not a certified reference method per EPA Method 350.1, the analyzer meets performance criteria outlined in ISO 5667-3 for routine monitoring and trend analysis. All electrical interfaces conform to IEC 61000-6-2 (immunity) and IEC 61000-6-4 (emissions); relay outputs comply with IEC 61810-1 for safety-rated switching.
Software & Data Management
Data logging capacity supports 600,000 timestamped records—including NH3–N value, temperature, calibration timestamps, alarm events, and cleaning actuation logs. Internal non-volatile memory retains data during power loss. Export is facilitated via Modbus register mapping or optional USB-to-serial adapter (not included). The system supports audit-trail functionality through password-protected access levels (operator, technician, administrator), satisfying foundational requirements for GLP-aligned operational procedures. Though not natively 21 CFR Part 11 compliant, its deterministic event logging and user-access controls provide traceability suitable for internal QA/QC documentation and regulatory pre-audits.
Applications
- Real-time effluent compliance monitoring at wastewater treatment plants—particularly for discharge consent limits under EU Urban Wastewater Treatment Directive (91/271/EEC) or US Clean Water Act NPDES permits.
- Feedwater quality assurance in power generation facilities, where elevated ammonia can accelerate copper alloy corrosion in condensate systems.
- Process control in aquaculture recirculating aquaculture systems (RAS), where sub-ppm NH3–N thresholds directly impact fish health and biofilter stability.
- Monitoring of reclaimed water distribution networks to verify residual disinfectant stability and prevent nitrification-induced taste/odor events.
- Industrial pretreatment verification for electroplating, semiconductor, and pharmaceutical manufacturing sites subject to local water authority ammonia discharge caps.
FAQ
What electrode types are supported by the PM 8202I controller?
The PM 8202I controller is designed exclusively for GreenPrima’s Bsens-series ion-selective electrodes: Bsens710 (fluoride), Bsens720 (chloride), and Bsens730 (ammonia nitrogen). Cross-brand or third-party ISEs are not electrically or chemically compatible.
Is automatic pH compensation included?
No. The PM 8202I does not include integrated pH sensing. Accurate ammonia nitrogen measurement requires external pH monitoring and manual input or feed-forward correction when pH deviates significantly from 7.0–9.0—the optimal range for NH3/NH4+ equilibrium.
How often must the Bsens730 electrode be calibrated?
Calibration frequency depends on matrix fouling potential and required uncertainty. For clean drinking water, biweekly two-point calibration (e.g., 1 ppm and 100 ppm standards) is typical; for raw wastewater, daily calibration or auto-calibration with integrated standard reservoirs (optional accessory) is recommended.
Can the analyzer operate on 24 VDC only?
Yes. The PM 8202I accepts either 90–260 VAC (50/60 Hz) or 24 VDC as primary power input—making it suitable for solar-powered remote stations or explosion-proof zones requiring intrinsically safe auxiliary supply.
Does the system support MODBUS TCP?
No. Communication is limited to MODBUS RTU over RS485 physical layer. Ethernet or wireless connectivity requires an external protocol converter or gateway device configured as a MODBUS master/slave bridge.
