GreenPrima Prosan8200 Online Turbidimeter for Water Treatment Plants

Overview

The GreenPrima Prosan8200 is an online turbidimeter engineered for continuous, real-time monitoring of turbidity in municipal drinking water treatment processes and industrial water loops. It operates on the 90° light scattering principle—compliant with EPA Method 180.1 and ISO 7027—ensuring traceable, standardized measurement performance across regulatory and quality assurance frameworks. Unlike benchtop or portable units, the Prosan8200 integrates directly into pressurized water streams via a flow-through cell, eliminating sample handling errors and enabling true process-integrated analytics. Its optical architecture features a stable 850 nm infrared LED source with a nominal 7-year service life, minimizing drift and recalibration frequency. The instrument is designed for deployment at critical control points—including pre-filtration, post-filtration, sedimentation effluent, and finished water distribution—where rapid detection of particulate anomalies (e.g., filter breakthrough, coagulant dosing shifts, or biofilm sloughing) is essential for maintaining regulatory compliance and operational resilience.

Key Features

• Flow-through measurement cell with integrated pressure regulation (factory-set to 15 psi), compatible with line pressures up to 200 psi
• High-resolution detection down to 0.0001 NTU, with auto-ranging capability across 0–1000 NTU to preserve signal fidelity at both low- and high-turbidity extremes
• Dual environmental protection: desiccant cartridge and internal fan system actively suppress condensation and moisture ingress within the optical chamber
• Self-diagnostic desiccant monitoring—automated alert triggers when humidity threshold exceeds specification, ensuring long-term optical stability
• Modular mechanical and electronic architecture enables field-replaceable components (e.g., light source, detector module, power supply) without full unit replacement
• Backlit multi-line LCD interface supports local configuration, real-time data viewing, and diagnostic status display without external software
• IP66-rated enclosure certified for outdoor wall-mount installation in humid, temperature-variable environments (1–50 °C operating range)

Sample Compatibility & Compliance

The Prosan8200 is validated for use with potable water, clarified surface water, filtered groundwater, and low-conductivity industrial process waters (e.g., pharmaceutical purified water, beverage rinse water, power plant condensate). It excludes applications involving highly colored, strongly absorbing, or highly viscous samples where Mie scattering assumptions may degrade accuracy. Regulatory alignment includes full conformance with U.S. EPA Method 180.1 for drinking water analysis and ISO 7027:2016 for instrument performance criteria—including spectral bandwidth, detector geometry, and calibration traceability to formazin or equivalent primary standards. The device supports GLP/GMP-aligned operation through configurable audit trails (via MODBUS logging), user-access-level controls, and non-volatile memory retention of calibration history and alarm events.

Software & Data Management

While fully functional as a standalone analyzer, the Prosan8200 supports integration into centralized SCADA and DCS platforms via isolated 4–20 mA analog output or RS-485 serial interface compliant with MODBUS RTU protocol. All digital communications are electrically isolated to prevent ground-loop interference in electrically noisy plant environments. Configuration, calibration, and diagnostics can be performed locally via the front-panel interface or remotely using GreenPrima’s optional PC-based configuration utility (v3.2+), which logs timestamped calibration coefficients, sensor health metrics, and alarm activation records. Data export is supported in CSV format for import into LIMS or statistical process control (SPC) systems. Firmware updates are delivered via secure USB flash drive, preserving integrity under FDA 21 CFR Part 11 requirements for electronic records and signatures when deployed in regulated manufacturing settings.

Applications

• Municipal water treatment: Continuous monitoring of raw intake, coagulation/flocculation basins, sedimentation effluent, dual-media filter influent/effluent, and clearwell/chlorination point
• Distribution system surveillance: Detection of transient turbidity spikes indicating main breaks, valve operations, or hydrant flushing impacts
• Pharmaceutical water systems: USP purified water and water-for-injection (WFI) loop monitoring per EMA/FDA guidance
• F&B production: Rinse water validation, CIP return stream assessment, and final product water quality assurance
• Power generation: Condensate polishing loop turbidity trending to detect resin bed exhaustion or ion exchange leakage
• Industrial cooling towers: Early warning of suspended solids accumulation preceding microbiological fouling or heat exchanger scaling

FAQ

Does the Prosan8200 require periodic lamp replacement?
No—the 850 nm LED light source is rated for 7 years of continuous operation under typical ambient conditions; no scheduled lamp replacement is required during normal service life.
Can the instrument operate under variable line pressure?
Yes—the built-in pressure regulator maintains constant 15 psi flow-cell pressure across input pressures from 1 to 200 psi, ensuring consistent optical path geometry and measurement repeatability.
Is calibration traceable to NIST or other national standards?
Yes—calibration is performed using formazin-equivalent standards traceable to NIST SRM 2102 or equivalent ISO-certified reference materials; certificate of calibration is provided with each unit.
How is moisture management handled in high-humidity installations?
The unit incorporates both a replaceable desiccant cartridge and an active internal fan that circulates dry air across optical surfaces, preventing condensation-induced signal noise or lens fogging.
What alarm logic options are available?
Two independent relay outputs support programmable high/low thresholds with hysteresis, time-delayed triggering, and latching/non-latching modes—configurable via local interface or MODBUS register write.