Shenchanghong PTURB-302 Portable Turbidimeter
| Brand | Shenchanghong |
|---|---|
| Origin | Guangdong, China |
| Manufacturer Type | Direct Manufacturer |
| Country of Origin | China |
| Model | PTURB-302 |
| Product Type | Portable |
| Measurement Range | 0–1000 NTU |
| Resolution | 0.1 NTU |
| Operating Temperature | 5–40 °C |
| Accuracy | ≤ ±2 % |
| Housing Rating | IP65 |
| Power Management | Up to 6 months standby (typical) |
| Data Storage | 20 calibration curves + 500 measurement records |
| Optical System | Narrow-band interference filter with cold LED light source |
| Construction | Molded ABS housing |
Overview
The Shenchanghong PTURB-302 Portable Turbidimeter is an ISO 7027-compliant optical instrument engineered for field-deployable, high-reproducibility turbidity measurements in water quality monitoring applications. It operates on the principle of nephelometric detection—measuring the intensity of light scattered at 90° by suspended particles in a liquid sample—ensuring alignment with international standard methodologies for drinking water, wastewater effluent, and environmental surface water analysis. Designed for rugged portability without compromising metrological integrity, the PTURB-302 integrates a stable cold LED light source and a narrow-band interference optical path to minimize spectral drift and photometric noise. Its compact form factor (185 × 85 × 45 mm), lightweight construction (<400 g), and IP65-rated molded ABS enclosure enable reliable operation in humid, dusty, or intermittently wet environments—including municipal distribution networks, aquaculture facilities, and remote watershed sampling sites.
Key Features
- ISO 7027-compliant nephelometric optical design with 90° scatter detection geometry
- Cold LED light source (850 nm nominal wavelength) offering >50,000-hour service life and minimal thermal drift
- Narrow-band interference filter system ensuring consistent spectral bandwidth (<20 nm FWHM) and immunity to ambient light interference
- High-stability optical train with precision-aligned quartz cuvette holder and integrated reference photodiode for real-time signal normalization
- Low-power 16-bit microcontroller architecture enabling up to 6 months of standby time on two AA alkaline batteries
- IP65-rated molded ABS housing resistant to corrosion, impact, and ingress of dust/water—validated per IEC 60529
- Onboard data retention with non-volatile memory supporting 20 user-defined calibration curves and 500 timestamped measurement records
- Automatic data backup during power loss via capacitor-assisted memory write protection
Sample Compatibility & Compliance
The PTURB-302 accepts standard 25-mm round glass or disposable plastic cuvettes (10-mm path length), compatible with common laboratory and field sampling protocols. It supports direct measurement of raw water, clarified effluent, filtered process streams, and treated potable water without dilution across its full 0–1000 NTU range. The instrument meets the optical performance criteria specified in ASTM D6508 (Standard Test Method for Determination of Turbidity in Water), EPA Method 180.1, and Chinese national standard HJ 1075-2019. Its calibration traceability aligns with NIST-traceable formazin standards (or equivalent polymer-based calibrants), and routine verification follows GLP-compliant procedures including daily zero and span checks using certified reference suspensions.
Software & Data Management
Data export is supported via USB-C interface to Windows-compatible desktop software (included), enabling batch download, curve fitting, statistical summary (mean, SD, CV%), and PDF report generation compliant with ISO/IEC 17025 documentation requirements. All stored measurements include embedded metadata: date/time stamp, operator ID (user-configurable), calibration ID, and ambient temperature reading. Audit trail functionality logs all critical events—including calibration updates, firmware revisions, and zero-point adjustments—with immutable timestamps. While not FDA 21 CFR Part 11-certified out-of-the-box, the firmware architecture supports configurable user authentication and electronic signature workflows when deployed within validated QA/QC environments.
Applications
- Field verification of drinking water compliance per WHO Guidelines for Drinking-water Quality (turbidity < 1 NTU at point-of-use)
- Real-time monitoring of coagulation/flocculation efficiency in water treatment plants
- Effluent quality assessment prior to discharge under local environmental permits
- Process control in membrane filtration systems and UV disinfection validation
- Research-grade turbidity profiling in limnological and hydrological studies
- Education and training labs requiring portable, robust instrumentation with pedagogical clarity
FAQ
What calibration standards are recommended for routine verification?
Formazin suspension (100 NTU and 400 NTU) or primary-grade StablCal® standards are recommended; secondary calibration using manufacturer-provided check standards is acceptable for daily operational verification.
Can the PTURB-302 measure samples with air bubbles or foam?
No—air bubbles and surface foam cause erroneous scatter signals; samples must be degassed and allowed to settle for ≥30 seconds prior to measurement to ensure representative particle suspension.
Is the instrument suitable for seawater or high-salinity brines?
Yes, provided the cuvette is thoroughly rinsed with deionized water after each use to prevent salt crystallization on optical surfaces; no internal corrosion risk due to sealed optical chamber and ABS housing.
How often should the optical window be cleaned?
After every 10 measurements or immediately following any visibly contaminated sample; use only lens-grade tissue and isopropyl alcohol to avoid micro-scratching.
Does the device support external power supply during extended lab use?
Yes—USB-C port enables continuous operation via 5 V DC power bank or wall adapter, with automatic battery bypass and charging circuitry (battery charging not supported).
