Leici WZB-176E Portable Turbidimeter
| Brand | Leici |
|---|---|
| Origin | Shanghai, China |
| Manufacturer Type | Direct Manufacturer |
| Regional Origin | Domestic (China) |
| Model | WZB-176E |
| Product Type | Portable |
| Measurement Range | (0.00–9.99) NTU, (10.00–99.9) NTU, (100.0–999) NTU, (1000–2000) NTU |
| Resolution | 0.01 NTU / 0.1 NTU / 1 NTU |
| Operating Temperature | 5–35 °C |
| Accuracy | ±6% |
| Repeatability | ≤0.5% |
| Zero Drift | ±0.5% FS/30 min |
| Stability | ±0.5% FS/30 min |
| Calibration Points | Up to 6 points (2, 20, 200, 500, 1000, 2000 NTU) |
| Data Storage Capacity | 2000 records |
| Display | 4.3-inch color TFT touchscreen |
| Protection Rating | IP65 |
| Power Supply | Rechargeable Li-ion battery |
| Dimensions & Weight | 90 × 250 × 90 mm, approx. 0.8 kg |
Overview
The Leici WZB-176E Portable Turbidimeter is an engineered optical measurement instrument designed for field-deployable and laboratory-grade turbidity assessment in water quality monitoring applications. It operates on the principle of nephelometric detection—measuring the intensity of scattered light at 90° relative to the incident beam—as specified in U.S. EPA Method 180.1 and China’s HJ 1075–2019 standard for turbidity determination. Compliant with ISO 7027 for instrumental design and photometric response, the device integrates a tungsten-halogen light source emitting across 400–600 nm, optimized for broad-spectrum compatibility with natural and treated water matrices. Its dual-mode optical architecture supports both nephelometric (90° scatter) and scatter-transmission hybrid measurements, enabling reliable quantification across low- to high-turbidity ranges—from clear surface waters to highly suspended industrial effluents—without manual optical path adjustment.
Key Features
- 4.3-inch high-resolution color TFT touchscreen interface with intuitive icon-driven navigation and real-time graphical feedback
- Dual optical measurement modes: selectable nephelometric (NTU) and scatter-transmission (FNU/EBC) configurations per ISO 7027 and DIN EN ISO 7027-1
- Auto-ranging capability across four dynamic measurement spans: 0.00–9.99 NTU, 10.00–99.9 NTU, 100.0–999 NTU, and 1000–2000 NTU
- Multi-unit support: direct switching between NTU (nephelometric turbidity units), FNU (formazin nephelometric units), and EBC (European Brewery Convention units)
- Comprehensive calibration suite: zero-point correction plus up to six-point calibration using certified formazin or equivalent standards (2, 20, 200, 500, 1000, 2000 NTU)
- IP65-rated enclosure ensuring dust-tightness and protection against low-pressure water jets—suitable for outdoor deployment in humid or rain-prone environments
- Integrated GLP-compliant data management: timestamped storage of 2000 measurement records with operator ID tagging, audit trail metadata, and export-ready formatting
Sample Compatibility & Compliance
The WZB-176E accommodates standard 25-mm round glass cuvettes (supplied) and is compatible with ASTM D6508, ISO 7027-1:2016, US EPA 180.1, and HJ 1075–2019 protocols. Its optical path geometry and detector sensitivity are validated for aqueous samples containing suspended particulates ranging from colloidal clays to algal blooms and wastewater solids. The instrument meets regulatory requirements for environmental monitoring, drinking water verification, and wastewater discharge compliance. Built-in zero-drift compensation (<±0.5% FS/30 min) and thermal stability control ensure consistent performance across ambient temperatures from 5 °C to 35 °C—critical for uncontrolled field conditions.
Software & Data Management
Data acquisition and reporting adhere to Good Laboratory Practice (GLP) principles. Each stored record includes date/time stamp, measurement mode, calibration status, operator ID (configurable), and raw signal values. Data export is supported via Micro-USB connection using Leici’s dedicated PC communication software (Windows-compatible), enabling CSV or PDF report generation. RS-232 serial output permits direct integration with legacy lab printers for hardcopy documentation. All firmware updates, calibration logs, and system diagnostics are traceable and retain full revision history—supporting FDA 21 CFR Part 11 readiness when paired with controlled user access protocols.
Applications
- Field-based potable water quality screening by municipal utilities and environmental agencies
- Process monitoring in drinking water treatment plants (coagulation, sedimentation, filtration stages)
- Wastewater influent/effluent compliance testing per national discharge limits
- Educational laboratory instruction in environmental science and analytical chemistry curricula
- Industrial cooling water and boiler feedwater clarity verification
- Research on sediment transport dynamics, reservoir eutrophication, and stormwater runoff characterization
FAQ
What turbidity standards are supported for calibration?
The WZB-176E supports single-point or multi-point calibration using NIST-traceable formazin standards or equivalent polymer suspensions at 2, 20, 200, 500, 1000, and 2000 NTU.
Does the instrument comply with international regulatory standards?
Yes—it conforms to US EPA Method 180.1, ISO 7027-1:2016, and China’s HJ 1075–2019, with optical design validated per ISO/IEC 17025 metrological requirements.
Can measurement data be exported for LIMS integration?
Yes—CSV-formatted datasets with full metadata (timestamps, calibration IDs, operator codes) are exportable via USB; optional API integration available through Leici’s certified software development kit.
What is the battery life under typical field use?
The rechargeable Li-ion battery provides up to 12 hours of continuous operation at 25 °C; battery level and charging status are displayed in real time on the touchscreen interface.
Is the device suitable for marine or high-salinity water analysis?
While not corrosion-rated for prolonged seawater immersion, the IP65 housing and sealed optical chamber permit short-term use in brackish or estuarine environments when rinsed post-use with deionized water.
