GreenPrima Prosan8200 Online Turbidimeter

Overview

The GreenPrima Prosan8200 Online Turbidimeter is an industrial-grade, continuous-monitoring turbidity analyzer engineered for high-reliability deployment in municipal drinking water treatment plants and critical process water applications. It operates on the principle of nephelometric measurement—detecting scattered light at 90° relative to an 850 nm near-infrared LED source—as defined by EPA Method 180.1 and ISO 7027:2016. This optical configuration ensures minimal interference from color, absorbance, or particle fluorescence, delivering metrologically traceable turbidity data in Nephelometric Turbidity Units (NTU). Designed for unattended operation in variable-pressure, high-humidity environments, the Prosan8200 integrates a replaceable desiccant-based moisture removal system and active internal airflow management to prevent condensation on optical surfaces—key factors affecting long-term signal stability in online water quality instrumentation.

Key Features

• Integrated moisture control architecture featuring user-replaceable desiccant cartridges and a thermostatically regulated internal fan, eliminating optical path fogging without compromising response dynamics.
• Nephelometric optical design with non-contact measurement geometry: the light source and detector are fully isolated from the sample stream, preventing fouling, biofilm accumulation, or mechanical wear on optical components.
• Modular, field-serviceable construction enabling rapid replacement of sensor modules, electronics boards, and pressure regulation assemblies—minimizing downtime during routine maintenance or calibration.
• Intelligent bubble suppression system that physically separates entrained air from the measurement chamber using laminar flow conditioning, ensuring accurate readings without introducing artificial delay in real-time response.
• Factory-calibrated with NIST-traceable formazin standards; supports two-point (zero and span) calibration in under 5 minutes using reusable, pre-characterized calibration kits—reducing consumable cost over instrument lifetime.
• Configurable response time (5–500 s) and resolution (down to 0.0001 NTU), allowing optimization for fast transient detection (e.g., filter breakthrough events) or high-precision baseline monitoring (e.g., finished water compliance).

Sample Compatibility & Compliance

The Prosan8200 is validated for continuous measurement of potable water, filtered effluent, clarified settling basin outflow, and distribution system water across pressure ranges of 1–200 psi (internally regulated to 15 psi nominal). Its wetted materials—316 stainless steel flow cell, fused silica optical windows, and EPDM seals—are compatible with chlorine, chloramine, and low-dose ozone residuals typical in modern disinfection practices. The instrument meets regulatory requirements for drinking water monitoring per U.S. EPA 40 CFR Part 141 and supports audit-ready data integrity through configurable logging intervals and timestamped event records. While not intrinsically rated for hazardous locations, its IP66 enclosure provides protection against dust ingress and powerful water jets—suitable for indoor control rooms, outdoor kiosks, and wet well enclosures when installed per manufacturer guidelines.

Software & Data Management

Local operation is supported via a backlit, multi-line LCD interface with intuitive menu navigation and real-time graphical trend display. For integration into centralized SCADA or LIMS platforms, the Prosan8200 offers dual communication options: isolated 4–20 mA analog output (HART-enabled upon request) and RS-485 serial interface supporting MODBUS RTU protocol (addressable up to 247 devices on a single bus). Data logging is performed internally with non-volatile memory capable of storing >10,000 timestamped readings (NTU, temperature, pressure, diagnostic flags). All calibration actions, parameter changes, and alarm events generate immutable audit trails compliant with GLP and GMP documentation expectations. Optional firmware updates are delivered via secure USB or Ethernet port (when equipped with optional communication module), maintaining alignment with evolving cybersecurity best practices for operational technology.

Applications

• Municipal water treatment: real-time monitoring of raw intake, coagulation/flocculation basins, sedimentation effluent, rapid sand/activated carbon filter influent and effluent, and clearwell/chlorination contact tank discharge.
• Distribution system surveillance: early detection of main breaks, cross-connections, or sediment resuspension events at critical junctions and booster stations.
• Industrial process water: continuous turbidity assurance in pharmaceutical purified water (PW) loops, beverage production rinse lines, power plant condensate polishing systems, and food processing CIP return streams.
• Regulatory compliance reporting: automated generation of daily maximum, minimum, and average NTU values aligned with EPA SDWA reporting templates and EU Drinking Water Directive Annex I metrics.

FAQ

Does the Prosan8200 require periodic lamp replacement?
No—the 850 nm LED light source is rated for 7 years of continuous operation under normal ambient conditions and does not require scheduled replacement.
Can the instrument operate reliably in high-humidity outdoor enclosures?
Yes—its dual-stage moisture management (desiccant + forced-air circulation) maintains optical path integrity even at 95% RH and ambient temperatures up to 50 °C.
Is the 4–20 mA output intrinsically safe?
The standard output is isolated but not intrinsically safe; however, it may be connected to IS barriers in hazardous area installations per IEC 60079-11 guidelines.
How often must calibration be performed to maintain regulatory compliance?
Per EPA guidance for continuous turbidimeters, verification is recommended daily (zero check) and full two-point calibration every 7 days—or more frequently if process conditions indicate drift (e.g., post-backwash filter events).
What validation documentation is provided with each unit?
Each Prosan8200 ships with a Certificate of Conformance, NIST-traceable factory calibration report, and ISO/IEC 17025-accredited test data for optical performance parameters (stray light, linearity, repeatability).