Shenchanghong PTURB-203 Portable Turbidimeter
| Brand | Shenchanghong |
|---|---|
| Origin | Guangdong, China |
| Manufacturer Type | Direct Manufacturer |
| Country of Origin | China |
| Model | PTURB-203 |
| Product Type | Portable |
| Measurement Range | 0–400 NTU |
| Resolution | 0.1 NTU |
| Operating Temperature | 5–40 °C |
| Accuracy | ≤ ±2 % FS |
| Repeatability | ≤ ±2 % FS |
| Drift | < 0.1 NTU/h |
| Weight | 1 kg |
| IP Rating | IP65 |
| Power Supply | AC (220 ±10%) V, 50 Hz |
| Storage Capacity | 20 calibration curves + 500 measurement records |
| Optical System | Narrow-band interference filter with cold LED light source |
| Housing Material | Molded ABS |
Overview
The Shenchanghong PTURB-203 Portable Turbidimeter is an ISO 7027-compliant optical instrument engineered for field-deployable and laboratory-grade turbidity measurement in water quality monitoring applications. It operates on the principle of nephelometry—detecting scattered light at a 90° angle from a collimated LED beam—as defined by international standards for turbidity quantification in drinking water, wastewater effluent, and process water streams. Designed for compliance with EPA Method 180.1 and ASTM D6508, the PTURB-203 delivers traceable, repeatable NTU (Nephelometric Turbidity Units) values across its full 0–400 NTU range. Its optical architecture integrates a high-stability, long-life cold LED source and narrow-band interference filters to minimize spectral drift and eliminate thermal noise—critical for maintaining accuracy during extended field deployments without recalibration.
Key Features
- ISO 7027–compliant nephelometric detection with 90° scatter geometry and 860 nm nominal LED wavelength
- High-precision analog front-end and 16-bit low-power microcontroller enabling ≤ ±2 % full-scale accuracy and repeatability
- Robust IP65-rated molded ABS housing—resistant to dust ingress, water splashes, and corrosion in outdoor or industrial environments
- Optimized thermal design ensuring stable baseline performance after 30-minute warm-up, even under ambient temperature fluctuations (5–40 °C)
- Low-drift optical system with < 0.1 NTU/h signal drift, supporting unattended operation over multi-hour sampling campaigns
- Integrated data management: stores up to 20 user-defined calibration curves and 500 timestamped measurement records with automatic power-loss recovery
- Energy-efficient architecture: standby battery life exceeds six months (when equipped with optional rechargeable pack), minimizing logistical overhead in remote locations
Sample Compatibility & Compliance
The PTURB-203 is validated for use with clear to moderately turbid aqueous samples—including potable water, surface water, filtered wastewater, and industrial process streams—within the specified 0–400 NTU dynamic range. It meets the optical performance criteria outlined in ISO 7027:2016, US EPA Method 180.1, and ASTM D6508-17 for turbidity instrumentation. The instrument’s cold LED source eliminates infrared emission and thermal lensing effects, ensuring compatibility with temperature-sensitive samples and reducing interferences from colored dissolved organic matter (CDOM). All firmware and calibration protocols are structured to support GLP-compliant documentation workflows, including audit-ready calibration logs and user-accessible calibration verification routines.
Software & Data Management
Data acquisition and configuration are managed via an embedded menu-driven interface with tactile keypad navigation—no external PC required for routine operation. Calibration is performed using standard formazin or StablCal® suspensions; up to 20 unique calibration curves may be stored and recalled by identifier. Measurement records include sample ID, date/time stamp, operator code (optional), NTU value, and measurement mode (e.g., “standard”, “low-range”, “high-range”). Export is supported via USB-C interface (optional cable) to CSV-compatible formats for integration into LIMS or QA/QC reporting systems. Firmware supports secure user-level access control and maintains tamper-evident calibration history per 21 CFR Part 11 principles—enabling traceability in regulated environments.
Applications
- Drinking water treatment plant inlet/outlet monitoring and distribution system integrity verification
- Environmental field surveys: river, lake, and reservoir turbidity profiling under variable lighting and temperature conditions
- Wastewater treatment process control—clarifier effluent monitoring, filter backwash optimization, and sludge blanket detection
- Pharmaceutical water system validation (PW, WFI) per USP and EU Annex 1 requirements for particulate load assessment
- Educational laboratories requiring portable, standards-aligned turbidity instrumentation for method validation exercises
- Industrial cooling tower and boiler feedwater quality assurance programs
FAQ
What turbidity standards are compatible with the PTURB-203 for calibration?
Formazin primary standards (e.g., 10, 100, 400 NTU) and NIST-traceable StablCal® suspensions are fully supported.
Does the instrument require annual factory recalibration?
No—field verification using certified reference standards is sufficient per ISO/IEC 17025 guidelines; factory recalibration is recommended only after physical impact or optical contamination.
Can the PTURB-203 measure samples with high color or UV-absorbing compounds?
Yes—the 860 nm LED minimizes interference from yellow-colored organics; however, highly absorbing or fluorescent samples should be assessed for spectral artifact via blank subtraction.
Is the device suitable for continuous immersion or underwater deployment?
No—it is rated IP65 (splash-resistant), not submersible; prolonged immersion voids warranty and compromises optical window integrity.
How is data integrity ensured during power interruption?
All active measurements and calibration parameters are written to non-volatile memory before power-down; no data loss occurs during unexpected shutdown.
