WTW Turb 750IR Portable Turbidimeter

Overview

The WTW Turb 750IR is a high-precision portable turbidimeter engineered for compliance with DIN EN ISO 7027-1 using infrared (IR) LED illumination at 860 nm. It employs the 90° scattered light detection principle—optimized for interference-free measurement in colored, suspended, or highly turbid samples encountered in drinking water, wastewater, food & beverage (e.g., wine, beer), pharmaceutical, aquaculture, and industrial process monitoring. Unlike white-light instruments, the IR optical path minimizes spectral interference from sample coloration and reduces sensitivity to particle composition variability—ensuring metrological robustness across diverse matrices. Its rugged, IP67-rated housing, integrated graphical display (160 × 104 pixels), and intuitive foil keyboard support field-deployable operation under GLP/GMP-aligned workflows.

Key Features

• Infrared LED light source (860 nm) compliant with DIN EN ISO 7027-1 for standardized, traceable turbidity quantification
• Intelligent Reproducibility and Plausibility Check (IRPC) algorithm enabling real-time assessment of measurement stability and outlier rejection
• Three-point calibration kit included—pre-calibrated AMCO® Clear polymer microsphere standards (0.02, 10.0, and 1000 FNU)—certified for long-term stability (<0.5% drift/year) and traceability to formazin reference materials
• Flexible calibration options: default 3-point, user-defined 2–5 point, or rapid 1-point calibration with configurable interval alerts and digital protocol storage
• GLP-compliant data architecture: each measurement stores associated calibration ID, AQA status flag, sample ID (alphanumeric input), operator name, timestamp, and environmental metadata
• Onboard memory for 2500 full datasets—including calibration protocols, AQA logs, and IRPC diagnostics—accessible via USB or RS232 interface
• No silicone oil required: optimized optical window design eliminates need for refractive index matching on vial surfaces

Sample Compatibility & Compliance

The Turb 750IR accepts standard 28 mm borosilicate glass vials (min. 15 mL volume) with PTFE-coated rubber seals and phenolic caps—compatible with routine laboratory and field sampling protocols. It meets regulatory requirements for potable water testing per EPA Method 180.1 (via Turb 750TT variant) and EU Directive 98/83/EC. Instrument firmware and data handling fully support FDA 21 CFR Part 11 compliance when used with Turb Data PC software (audit trail, electronic signatures, role-based access control). All calibration standards are certified to ISO/IEC 17025-accredited reference laboratories, and instrument performance validation aligns with ASTM D6508 and ISO 7027-1 verification procedures.

Software & Data Management

Turb Data PC software (included on CD-ROM) enables secure, audit-ready data export in CSV format for direct import into Excel, LIMS, or statistical analysis platforms. It provides instrument identification via unique serial number, user login authentication, and structured metadata tagging (e.g., location, batch ID, analyst). Data filtering functions allow post-acquisition exclusion of outliers based on IRPC confidence thresholds. The software generates printable calibration reports with uncertainty budgets, supports scheduled firmware updates via USB, and maintains immutable records of all configuration changes—fulfilling GLP documentation requirements for regulated environments.

Applications

• Drinking water quality assurance per WHO and national regulatory frameworks (e.g., U.S. EPA, German TrinkwV)
• Wastewater effluent monitoring prior to discharge, including activated sludge and tertiary filtration validation
• Clarity control in beverage production (beer haze, wine filtration endpoints, juice stabilization)
• Pharmaceutical clean-in-place (CIP) rinse water verification and sterile process water qualification
• Aquaculture pond turbidity profiling for suspended solids management and feed efficiency optimization
• Industrial cooling water and boiler feedwater turbidity surveillance to prevent fouling and corrosion

FAQ

What optical standard does the Turb 750IR follow?

It complies with DIN EN ISO 7027-1 using an 860 nm infrared LED and 90° scattered light detection geometry.
Can it measure both FNU and NTU units?

Yes—the instrument displays results in FNU by default (per ISO 7027-1); NTU interpretation is supported for comparative reporting where required.
Is calibration traceable to national standards?

All AMCO® Clear standards are certified by accredited laboratories with traceability to NIST SRM 2102 and BAM RM 025.
How is data integrity ensured during transfer?

Turb Data software implements SHA-256 hash validation for exported files and enforces write-once archival mode for raw datasets.
What maintenance is required beyond calibration?

Routine cleaning of the optical window and vial holder with lint-free cloth; no lamp replacement needed—IR LED lifetime exceeds 100,000 hours.