GreenPrima PS TAB 500 UV-VIS Absorption Colorimeter for Online Water Quality Monitoring

Overview

The GreenPrima PS TAB 500 is a high-precision, online UV-VIS absorption colorimeter engineered for continuous, reagent-free measurement of true color in liquid samples according to the Pt-Co (Platinum-Cobalt) scale. Unlike electromagnetic flowmeters—which measure volumetric flow rate via Faraday’s law of electromagnetic induction—the PS TAB 500 operates on spectrophotometric principles: it quantifies absorbance in the ultraviolet and visible spectrum (typically 320–700 nm) to determine color intensity as an indicator of dissolved organic matter, humic substances, industrial dyes, or process-related chromophores. This distinction is critical: while the product name erroneously references “electromagnetic flowmeter installation”, the technical description, measurement principle (UV-VIS absorption), sensor specifications (Pt-Co range), and application scope (wastewater, drinking water, seawater) confirm this is a dedicated optical colorimetric analyzer—not a flowmeter. The device is purpose-built for integration into municipal water treatment plants, pulp & paper mills, textile dyeing facilities, and chemical manufacturing sites where real-time color monitoring supports process optimization, regulatory compliance, and effluent quality control.

Key Features

• Reagent-free operation: Eliminates chemical consumption, hazardous waste generation, and associated disposal costs—fully compliant with ISO 7887 and ASTM D1209 for true color determination.
• Ultra-low maintenance architecture: LED light source lifetime exceeds 10 years; no consumables, no moving parts in the optical path, and self-cleaning fluidic design minimizes fouling from suspended solids or biofilm.
• Multi-mode operational flexibility: Supports manual spot checks, programmable timed measurements (e.g., every 15/30/60 minutes), and event-triggered sampling synchronized with process signals.
• Robust optical cell design: Quartz cuvette with FPM fluoroelastomer seals and 316L stainless steel wetted components ensure compatibility with aggressive matrices—including saline, acidic, or alkaline wastewater streams.
• Full automation suite: Integrated auto-zero, auto-calibration (using factory-certified reference standards), auto-measurement, auto-rinse, and fault-recovery protocols reduce operator dependency and enhance data continuity.
• Sub-5-second measurement cycle: Achieves rapid spectral acquisition and digital signal processing, enabling near real-time feedback for closed-loop control applications.

Sample Compatibility & Compliance

The PS TAB 500 accommodates aqueous samples across a broad physicochemical range: flow rates up to 2 L/min, operating pressures ≤2 bar, temperatures from 0 °C to 50 °C, and sample volumes <100 mL per analysis. Wetted materials—including fused quartz, polypropylene, FPM, 316L stainless steel, and borosilicate glass—meet USP Class VI and FDA 21 CFR Part 177 requirements for indirect food contact. The system complies with EN 61326-1 (EMC for industrial environments), IEC 60529 (IP65 ingress protection), and optional ATEX Zone 1/2 certification (II 2G Ex db IIB T4 Gb) for hazardous area deployment. Data integrity adheres to ALCOA+ principles, with audit-trail-enabled firmware supporting GLP/GMP environments and 21 CFR Part 11-compliant electronic records when paired with validated software.

Software & Data Management

The embedded controller features an 8.5-inch TFT color touchscreen (800 × 480 resolution) with intuitive HMI navigation and multilingual interface support. Internal 8 GB SD card stores >12 months of timestamped spectral data, calibration logs, and diagnostic events. Data export is supported via USB mass storage or RS485 Modbus RTU (slave/master configurable) for SCADA/DCS integration. Analog 4–20 mA output provides galvanically isolated, NIST-traceable current loop transmission (<0.5% full-scale error). Relay outputs support fail-safe alarm signaling (5 A NO / 3 A NC @ 277 VAC), while onboard memory retains configuration during power loss. Firmware updates are performed over secure HTTPS or local USB—no proprietary drivers required.

Applications

• Municipal wastewater treatment: Monitoring color breakthrough in tertiary filtration or activated carbon adsorption units.
• Pulp & paper industry: Quantifying lignin-derived chromophores in bleach plant effluents and process liquors.
• Textile manufacturing: Controlling dye bath consistency and verifying post-rinse clarity prior to discharge.
• Pharmaceutical water systems: Detecting organic contamination in purified water (PW) and water-for-injection (WFI) loops per USP .
• Drinking water utilities: Early warning detection of algal metabolites or humic acid spikes in raw surface water intakes.

FAQ

Is the PS TAB 500 compatible with existing SCADA systems?

Yes—it supports Modbus RTU over RS485 (configurable as master or slave) and provides isolated 4–20 mA analog output with HART-compatible digital overlay options.
Can the Pt-Co measurement range be extended beyond 2000?

Custom optical path lengths and dilution modules enable extended ranges up to 5000 Pt-Co; contact GreenPrima Engineering for application-specific validation.
Does the system require periodic lamp replacement?

No—the solid-state UV-VIS LED array is rated for >100,000 hours of operation and does not degrade spectrally over time, eliminating scheduled lamp maintenance.
How is zero calibration performed in-situ?

The system uses a dual-beam reference channel and automated air/water blank compensation; no manual intervention or external zero standards are needed.
What certifications are available for hazardous area installation?

ATEX II 2G Ex db IIB T4 Gb and IECEx certification kits are available ex-factory; installation must follow IEC 60079-14 guidelines.