GreenPrima Prosan 8200 Online Turbidimeter for Municipal Water Treatment

Overview

The GreenPrima Prosan 8200 Online Turbidimeter is an EPA Method 180.1- and ISO 7027-compliant optical instrument engineered for continuous, high-fidelity turbidity monitoring in municipal drinking water treatment facilities. It employs a stable 850 nm near-infrared LED light source and a 90° scattered-light detection geometry—fully aligned with nephelometric principles defined in regulatory standards. Unlike immersion-type sensors, the Prosan 8200 utilizes a flow-through measurement cell where the optical path remains physically isolated from the sample stream, eliminating fouling-related drift and reducing long-term calibration dependency. Its integrated pneumatic de-bubbling system suppresses transient air entrainment without introducing hydraulic delay, while the replaceable desiccant cartridge and internal cooling fan actively manage condensation and humidity—critical for maintaining optical stability in variable ambient conditions typical of pump stations, filter galleries, and clearwell environments.

Key Features

• Optically isolated measurement cell: Prevents direct contact between optical components and process water, minimizing maintenance and extending sensor longevity.
• Adjustable response time (5–500 s): Enables dynamic adaptation to rapid turbidity transients (e.g., during filter backwash recovery) or stable averaging for regulatory compliance reporting.
• Self-contained pressure regulation: Built-in pressure-reducing valve maintains consistent 15 psi sample flow—eliminating external regulators and ensuring laminar, bubble-free flow across the sensing zone.
• Modular architecture: Field-replaceable optical modules, desiccant cartridges, and cleaning kits support GLP-aligned maintenance logs and reduce mean time to repair (MTTR).
• Dual-output capability: Simultaneous isolated 4–20 mA analog output and RS-485 digital interface with MODBUS RTU enable seamless integration into SCADA, DCS, and PLC-based control systems.
• IP66-rated NEMA 4X enclosure: Certified for outdoor wall-mount installation in unconditioned environments, including wet utility corridors and open-air chlorination buildings.

Sample Compatibility & Compliance

The Prosan 8200 is validated for continuous operation with potable water matrices across all critical unit processes: raw intake, coagulation/flocculation effluent, sedimentation basin outflow, rapid sand filter influent and effluent, and finished water distribution headers. It meets U.S. EPA Drinking Water Regulations (40 CFR Part 141) requirements for turbidity monitoring at ≤0.3 NTU for filtered water, with traceable calibration using NIST-traceable formazin or AMCO AEPA standards. The instrument’s firmware supports audit-trail-enabled calibration logging per FDA 21 CFR Part 11 guidelines when paired with compliant data acquisition software. All wetted materials comply with NSF/ANSI Standard 61 for drinking water system components.

Software & Data Management

Local configuration and diagnostics are performed via the built-in multi-line LCD interface with intuitive menu navigation. For centralized oversight, GreenPrima’s optional TurbVision™ software (v3.2+) provides remote parameter adjustment, real-time trend visualization, automated calibration scheduling, and CSV-exportable event logs—including timestamped calibration verification, alarm history, and pressure deviation alerts. Data timestamps are synchronized via NTP-compatible Ethernet connectivity (optional add-on module). Calibration records include operator ID, standard lot number, reference value, measured value, and residual error—supporting ISO/IEC 17025 documentation requirements for accredited laboratories.

Applications

• Municipal water treatment: Real-time monitoring of filter performance, early detection of breakthrough events, and regulatory reporting at filtration effluent and distribution entry points.
• Industrial pretreatment: Monitoring of cooling tower make-up water, boiler feedwater prefiltration, and pharmaceutical purified water (PW) loop integrity verification.
• Food & beverage production: Continuous verification of final rinse water clarity prior to CIP validation and post-sanitation line clearance.
• Power generation: Condensate polishing system surveillance and demineralized water quality assurance in nuclear and fossil-fuel facilities.
• Research & education: Teaching platform for water quality engineering labs requiring traceable, standards-based nephelometric measurement methodology.

FAQ

Does the Prosan 8200 require periodic lamp replacement?

No—the 850 nm LED light source is rated for 7 years of continuous operation under typical municipal duty cycles (24/7), with output stability monitored internally and reported via diagnostic flags.
Can it be calibrated with non-formazin standards such as StablCal® or AMCO AEPA?

Yes—calibration coefficients are user-definable; the instrument accepts certified reference values from any ISO 7027-compliant primary standard, provided traceability documentation is maintained.
Is the 4–20 mA output intrinsically safe for hazardous area installation?

The standard output is non-IS; however, an optional ATEX/IECEx-certified galvanic isolator module (Order Code: PS8200-IS-MA) is available for Zone 2 classified locations.
How frequently should the desiccant cartridge be replaced?

Under normal indoor conditions (RH < 70%), replacement is recommended every 12 months; in high-humidity or outdoor enclosures, inspection every 6 months is advised—visual indicator window shows color change upon saturation.
Does the instrument support automatic zero calibration with deionized water?

Yes—zero calibration mode accepts user-defined DI water verification sequences with configurable pass/fail tolerance thresholds (default: ±0.01 NTU), logged with full metadata for QA review.