Shenchanghong PTURB-201A Portable Turbidimeter

Overview

The Shenchanghong PTURB-201A Portable Turbidimeter is an ISO 7027-compliant optical instrument engineered for field-deployable, high-reproducibility turbidity measurement in accordance with nephelometric principles. It employs a stable cold LED light source (850 nm nominal wavelength) and a narrow-band interference optical path to minimize spectral drift and stray-light interference—ensuring compliance with standard turbidity measurement protocols used in drinking water, pharmaceutical process water, and beverage quality control. The device operates on the 90° scattered light detection principle, calibrated against formazin standards traceable to NIST SRM 2102, and delivers quantitative results in nephelometric turbidity units (NTU) across its full 0–400 NTU range. Its compact, ruggedized housing (IP65-rated ABS polymer) enables reliable operation in humid, dusty, or mobile laboratory environments—including water treatment plants, QC labs, and field sampling sites where AC power is unavailable.

Key Features

• ISO 7027–compliant nephelometric measurement architecture with 850 nm LED excitation and 90° scatter detection
• Fixed 5 cm optical path length using precision-machined quartz cuvettes (included), eliminating path-length variability errors
• Rechargeable lithium-ion battery providing >180 days of standby life and ≥12 hours of continuous operation per charge
• High-stability optical train featuring temperature-compensated LED driver and thermally isolated detector assembly
• IP65-rated enclosure with corrosion-resistant ABS housing, enabling use in outdoor, industrial, or wet-location environments
• Onboard data management: stores up to 199 sample readings and 20 user-defined calibration curves with timestamping
• USB 2.0 interface supporting raw data export (CSV format) and firmware updates via PC-based utility software
• Automatic zero-point validation and drift compensation algorithm active during idle periods to maintain baseline integrity

Sample Compatibility & Compliance

The PTURB-201A is validated for aqueous samples meeting ASTM D6508, ISO 7027-1:2016, and USP turbidity requirements. It accepts standard 5 cm path-length square cuvettes (supplied), compatible with low-turbidity purified water (e.g., WFI, PW), municipal distribution samples, filtered process streams, and clarified beverages. The instrument meets GLP documentation requirements through built-in audit trail logging (power-on events, calibration actions, measurement timestamps) and supports 21 CFR Part 11–compliant data integrity workflows when paired with validated PC software. All optical components are certified free of leachable organics per USP , ensuring no interference in pharmaceutical-grade water testing.

Software & Data Management

Data acquisition and reporting are managed via Shenchanghong’s proprietary TurbiSoft v3.x desktop application (Windows 10/11 compatible), distributed on included optical media. The software enables batch calibration curve generation (linear, quadratic, or multi-point non-linear), statistical analysis (mean, SD, CV%), report export (PDF, Excel), and electronic signature capture for regulated environments. USB connectivity permits real-time streaming mode for continuous monitoring applications and automatic backup of all stored measurements. Instrument firmware supports over-the-air updates and includes configurable auto-shutdown, password-protected settings, and encrypted local storage to prevent unauthorized parameter modification.

Applications

• Drinking water quality verification at intake, filtration, and distribution points (per WHO Guidelines and EPA Method 180.1)
• In-process monitoring of purified water (PW) and water for injection (WFI) in pharmaceutical manufacturing (aligned with EU GMP Annex 1 and FDA Aseptic Guidance)
• Final product clarity assessment in breweries, wineries, and soft drink facilities (per ASBC Beer-4 and AOAC 971.22)
• Environmental field screening of surface water, wastewater effluent, and stormwater runoff
• Hospital central sterile supply departments (CSSD) validating rinse water clarity for medical device reprocessing
• Epidemiological surveillance by public health laboratories conducting routine potable water safety audits

FAQ

Is the PTURB-201A compliant with ISO 7027 for formal regulatory reporting?

Yes—the optical design, detector alignment, and calibration protocol fully satisfy ISO 7027-1:2016 requirements for ratio nephelometry at 850 nm.
Can the instrument be calibrated using non-formazin standards such as AMCO-AE or StablCal?

Yes; the device supports multi-point calibration with any traceable turbidity standard, provided its certification includes uncertainty statements and NIST-traceable reference values.
Does the USB interface support direct connection to LIMS without third-party software?

No—raw data export requires TurbiSoft v3.x; however, CSV output is structured for seamless ingestion into common LIMS platforms via automated script integration.
What maintenance is required for long-term optical stability?

Annual verification of LED intensity and detector responsivity is recommended; no user-serviceable optical alignment is required due to factory-sealed optical module construction.
Is the 5 cm cuvette path length suitable for low-turbidity applications below 1 NTU?

Yes—combined with 0.1 NTU resolution and sub-0.1 NTU/h thermal drift, the extended path length enhances signal-to-noise ratio for sub-NTU measurements while maintaining linearity per ISO 7027.