GreenPrima PM 8200I Online Water Hardness Analyzer
| Brand | GreenPrima |
|---|---|
| Origin | United Kingdom |
| Manufacturer Type | Original Equipment Manufacturer (OEM) |
| Product Category | Imported Instrument |
| Model | PM 8200I |
| Price Range | USD 1,400 – 7,000 (FOB UK) |
| Measurement Range | 0.00–20,000 ppm CaCO₃ equivalent |
| Resolution | 0.01 / 0.1 / 1 ppm |
| Accuracy | ±0.01 / ±0.1 / ±1 ppm (depending on range) |
| Temperature Compensation | -10 to 130 °C (NTC10K or PT1000 sensor input, manual/automatic) |
| Operating Temperature | 0 to 70.0 °C |
| Storage Temperature | -20 to 70.0 °C |
| Display | Backlit graphic LCD (128 × 64 pixels) |
| Data Storage | 600,000 records with timestamped retrieval |
| Power Supply | 90–260 VAC, 50/60 Hz or optional 24 VDC |
| Enclosure Rating | IP65 |
| Communication | RS485, MODBUS RTU protocol |
| Analog Outputs | Two isolated 4–20 mA outputs (max. loop resistance 500 Ω, accuracy ±0.1% FS) |
| Relay Output | One multifunction programmable relay (cleaning trigger, fault alarm, periodic alert) |
| Cleaning Control | Adjustable interval (0.1–1000 h) and duration (1–1000 s) |
| Mounting Options | Wall-mount, pole-mount, panel-mount |
| Dimensions | 144 × 144 × 106 mm |
| Panel Cutout | 138 × 138 mm |
| Weight | 0.86 kg |
| Compatible Electrode | GreenPrima Bsens740 hardness sensor (range: 0–40,000 mg/L as CaCO₃, resolution: 0.01 mg/L, accuracy: ±3% FS, PPS body, max. pressure: 3.5 bar, NTC10K temp. sensor integrated, 5 m cable, PG13.5 thread) |
Overview
The GreenPrima PM 8200I Online Water Hardness Analyzer is an industrial-grade, continuous-monitoring instrument engineered for precise, long-term measurement of calcium and magnesium ion concentration—expressed as calcium carbonate (CaCO₃) equivalents—in process water streams. It operates on the principle of potentiometric titration via a selective ion-sensitive electrode (ISE) coupled with real-time temperature compensation, enabling stable, drift-resistant readings across dynamic thermal and chemical environments. Designed specifically for mission-critical applications where scaling, corrosion, or regulatory compliance are primary concerns—including pharmaceutical purified water systems (PW), boiler feedwater, semiconductor rinse water, electroplating baths, and HVAC condenser loops—the PM 8200I delivers trace-level resolution and high reproducibility without reagent consumption or moving mechanical parts.
Key Features
- IP65-rated, fully sealed enclosure with reinforced PPS and stainless-steel hardware, certified for operation in humid, dusty, or chemically aggressive industrial zones
- Dual isolated 4–20 mA analog outputs compliant with IEC 61000-6-2/4 electromagnetic immunity standards, supporting integration into DCS, SCADA, or PLC-based control architectures
- RS485 serial interface with native MODBUS RTU protocol implementation—fully interoperable with industry-standard HMI platforms and data historians (e.g., Ignition, Siemens Desigo, Rockwell FactoryTalk)
- Configurable multifunction relay with programmable logic: supports automated electrode cleaning cycles, out-of-specification alarms, and system fault signaling per user-defined thresholds
- Onboard non-volatile memory storing up to 600,000 timestamped measurement records (hardness value, temperature, date/time, status flags), accessible via serial query or local display navigation
- Graphical backlit LCD with adjustable contrast and auto-dimming (3-minute timeout), supporting intuitive dual-language (English/Chinese) menu navigation without reliance on external documentation
- Flexible mounting options—panel-cut, wall-fixed, or pipe-clamp—enabling rapid deployment in constrained or vibration-prone locations common in utility corridors and cleanroom utility tunnels
Sample Compatibility & Compliance
The PM 8200I is validated for use with low-conductivity (≥5 µS/cm), non-oily, non-suspended aqueous matrices typical of high-purity water systems. When paired with the Bsens740 hardness sensor (PPS-bodied, NTC10K-integrated, 5 m shielded cable), it maintains metrological integrity across pH 5.5–9.5 and pressures up to 3.5 bar. The analyzer meets EN 61326-1:2013 (EMC for industrial environments) and conforms to ISO 5725-2:1994 for repeatability and intermediate precision. While not intrinsically safe, its design aligns with GMP Annex 11 data integrity expectations: all parameter changes, calibration events, and alarm triggers generate immutable audit logs with operator ID and timestamp. Optional 24 VDC power configuration supports integration into explosion-protected zone perimeters when used with appropriate barriers.
Software & Data Management
No proprietary PC software is required for basic commissioning; configuration is performed entirely via front-panel navigation or MODBUS register writes. For centralized monitoring, GreenPrima provides a free, lightweight Windows-based terminal tool supporting live data streaming, historical export (CSV), and batch calibration report generation. All communication adheres strictly to MODBUS function codes 03 (read holding registers) and 06/16 (write single/multiple registers). Data records include full metadata: measured hardness (ppm CaCO₃), compensated temperature (°C), sensor status (OK/ERROR/CLEANING), and system uptime. The device supports FDA 21 CFR Part 11-compliant workflows when deployed behind validated IT infrastructure—audit trails are retained indefinitely in non-volatile memory and exportable for GLP/GMP review.
Applications
- Pharmaceutical water systems: Continuous verification of PW, WFI, and steam condensate hardness to meet USP , EP 2.2.42, and JP 17 requirements
- Power generation: Feedwater hardness surveillance upstream of reverse osmosis and ion exchange units to prevent scale formation in high-pressure boilers
- Electronics manufacturing: Monitoring ultrapure rinse water (UPW) hardness in wafer fabrication lines to avoid particulate generation and surface defects
- Food & beverage processing: Ensuring consistent hardness levels in CIP rinse water and final product contact water per BRCGS and SQF Code Edition 9
- Centralized HVAC plants: Preventing limescale accumulation in cooling towers and heat exchangers through predictive maintenance based on trend analysis of 600k-point datasets
FAQ
Does the PM 8200I require chemical reagents or titrant solutions?
No. It employs a solid-state ion-selective electrode (Bsens740) and performs direct potentiometric measurement—eliminating reagent costs, waste disposal, and calibration drift associated with wet-chemistry methods.
Can the device operate in high-humidity outdoor enclosures?
Yes. Its IP65-rated housing, conformal-coated PCBs, and sealed membrane keypad ensure reliable performance at 95% RH non-condensing—validated per IEC 60068-2-30 testing protocols.
Is temperature compensation automatic or manual?
Both modes are supported. The system accepts NTC10K or PT1000 inputs and allows selection between automatic real-time compensation and fixed-point offset correction for legacy calibration traceability.
How is electrode cleaning triggered and verified?
Cleaning cycles are initiated by the programmable relay output, which energizes external solenoid valves or air-blast actuators. The analyzer logs each cleaning event—including start time, duration, and post-clean stability check—and flags incomplete recovery in the status register.
What validation documentation is supplied with the instrument?
Each unit ships with a Factory Calibration Certificate (traceable to NPL UK standards), Declaration of Conformity (CE), RoHS/REACH compliance statement, and full electrical safety test report (EN 61010-1).
