Soli-Tech 740 & 3150 Portable SS and Turbidity Analyzer

Overview

The Soli-Tech 740 and 3150 Portable SS and Turbidity Analyzers are engineered for field-deployable, real-time quantification of suspended solids (SS) concentration and turbidity in liquid matrices using nephelometric detection. Based on the standardized principle of light scattering at a 90° angle—aligned with ISO 7027 and EPA Method 180.1—the instruments deliver traceable, interference-resistant measurements across diverse wastewater and process water streams. Unlike absorbance-based systems, the scattered-light optical architecture minimizes errors induced by color, particle absorption, or background chromaticity, ensuring high reproducibility in colored effluents (e.g., pulp mill discharges, food processing runoff) and highly variable sludge suspensions. The analyzers operate without reagents or consumables, supporting continuous in-situ monitoring or grab-sample verification in compliance with GLP and routine environmental reporting requirements.

Key Features

• Ruggedized portable design with IP65-rated housing and integrated safety lanyard—engineered for industrial field use in wet, dusty, or vibration-prone environments.
• Dual-parameter capability: simultaneous or independent measurement of turbidity (NTU/FTU) and suspended solids concentration (mg/L, g/L, %SS) using a single optical probe.
• High-contrast 5-digit graphic LCD display with wide thermal stability (−20 °C to +60 °C), maintaining legibility under direct sunlight or low-ambient conditions.
• Soli-Tech optical probe (IP68 rated) featuring calibrated scatter optics, temperature-compensated signal processing, and 5-meter armored cable with metric markings for depth-resolved profiling.
• Rechargeable internal battery system with universal AC adapter (90–264 VAC, 47–63 Hz), enabling >12 hours of continuous operation per charge—ideal for extended site surveys or unpowered locations.
• Intuitive menu-driven interface with multilingual support (English, Spanish, French, German), requiring no software installation or external configuration tools.

Sample Compatibility & Compliance

The Soli-Tech 740/3150 is validated for use in municipal and industrial wastewater, activated sludge basins, primary/secondary clarifiers, anaerobic digesters, and process streams from pulp & paper, food & beverage, mining, and quarry operations. It meets the optical performance criteria specified in ISO 7027 (turbidity) and supports surrogate correlation protocols for SS quantification as referenced in ASTM D3977 and US EPA Guidance for Wastewater Monitoring (EPA 821-R-00-002). Probe calibration is traceable to NIST-traceable formazin standards, and instrument firmware supports audit-ready calibration logging per FDA 21 CFR Part 11 requirements when paired with optional data export modules. No sample filtration, dilution, or digestion is required for routine field measurement—reducing operator error and analytical turnaround time.

Software & Data Management

While the core unit operates autonomously, optional USB or Bluetooth data export enables transfer of timestamped measurement logs (including date/time, range setting, unit selection, and temperature compensation status) to standard spreadsheet or LIMS platforms. Firmware supports user-defined calibration curves for site-specific SS-turbidity correlations—critical where particle size distribution or refractive index deviates from standard formazin. All calibration events, probe diagnostics, and battery health metrics are stored locally with automatic timestamping. The system does not require cloud connectivity or proprietary software, ensuring full data sovereignty and compatibility with air-gapped facility networks common in regulated utilities and pharmaceutical manufacturing sites.

Applications

• MLSS (Mixed Liquor Suspended Solids) monitoring in activated sludge systems—supporting real-time biomass control and aeration optimization.
• Sludge blanket level tracking in secondary clarifiers to prevent washout and optimize sludge wasting schedules.
• Coagulant/flocculant dosing control via rapid turbidity feedback during clarification processes.
• Effluent compliance verification against discharge permits (e.g., NPDES limits for TSS or turbidity).
• Process troubleshooting in food & beverage plants—e.g., detecting yeast cell concentration in fermentation broth or starch carryover in brewing effluent.
• Field screening of lake sediments, construction runoff, and quarry dewatering streams for sediment load assessment.

FAQ

Does this analyzer require daily calibration?
No—field calibration is recommended before each deployment series using certified formazin standards; drift correction is typically <±2% over 72 hours under stable thermal conditions.
Can the probe be submerged continuously?
Yes—the IP68-rated Soli-Tech probe is rated for indefinite submersion up to 10 meters depth; cable strain relief and epoxy-sealed optics ensure long-term reliability in abrasive slurry environments.
Is temperature compensation automatic?
Yes—integrated Pt1000 sensor in the probe head provides real-time temperature compensation for both turbidity and SS readings, referenced to ISO 7027 Annex B.
What maintenance is required?
Routine cleaning of the optical window with lint-free cloth and deionized water; annual verification of probe alignment and zero offset using dark-cap calibration accessory.
Are replacement probes and cables available separately?
Yes—Soli-Tech offers field-replaceable probe assemblies, 5-m and 10-m cable kits, and ruggedized transport cases compliant with IATA and UN 38.3 shipping standards.