LeiCi DZS-708TP Multi-Parameter Water Quality Analyzer

Overview

The LeiCi DZS-708TP Multi-Parameter Water Quality Analyzer is a benchtop laboratory instrument engineered for high-reproducibility, multi-parameter analysis of aqueous samples in environmental monitoring, municipal water treatment, food & beverage QA/QC, and academic research laboratories. It integrates three independent electrochemical measurement modules—pH/pX, conductivity, and polarographic dissolved oxygen—within a single robust architecture. The system operates on fundamental potentiometric (pH, ion-selective electrodes), conductimetric (two-electrode or four-electrode cell), and amperometric (Clark-type polarographic sensor) principles, enabling trace-level ion quantification, wide-range conductivity profiling (from ultrapure water to brines), and temperature- and pressure-compensated DO determination. Designed for regulatory compliance workflows, the DZS-708TP supports full data integrity per Good Laboratory Practice (GLP) and Good Manufacturing Practice (GMP) requirements, including user-level access control, electronic signatures, audit-trail logging, and secure data export.

Key Features

• 7-inch high-resolution color TFT touchscreen with intuitive icon-driven interface; supports English and Chinese language selection
• Triple integrated measurement units: pH/pX module (0.001-class accuracy), conductivity module (0.5-class accuracy), and polarographic DO module with <45 s response time at 20 °C
• Comprehensive electrode diagnostics: real-time impedance monitoring, slope evaluation, asymmetry potential assessment, and calibration status flagging
• Intelligent endpoint detection: auto-read, timed-read, interval-read, and manual-read modes with configurable stability criteria
• Multi-mode temperature compensation: linear/non-linear conductivity compensation, seawater/default salinity models, and user-defined reference temperatures (5.0–25.0 °C)
• Advanced atmospheric pressure compensation for DO: selectable units (kPa, mbar, Torr, atm) with manual or barometric sensor input
• IP54-rated enclosure for dust resistance and limited water splashing protection during routine lab use
• Three-tier user permission system with password-protected administrator, supervisor, and operator roles; full GMP operation log retention

Sample Compatibility & Compliance

The DZS-708TP accommodates standard laboratory sample formats—including beakers, Erlenmeyer flasks, and custom cuvettes—via its universal electrode holder and optional automatic sampler integration. It accepts all common pH, ion-selective, conductivity (cell constant 0.01–10 cm⁻¹), and polarographic DO electrodes compliant with DIN 19263 and ASTM D888. Calibration is supported across six internationally recognized buffer sets (NIST, GB, DIN, USA, MERK, JIS) plus user-defined standards. The instrument meets key metrological and regulatory benchmarks: pH accuracy ±0.002 pH, conductivity error ±0.5% FS, DO accuracy ±0.10 mg/L (≤20 mg/L), and temperature uncertainty ±0.3 °C (0–60 °C). Data storage (1,000+ datasets) includes timestamps, operator IDs, electrode serial numbers, calibration history, and environmental metadata—fully traceable per ISO/IEC 17025 and FDA 21 CFR Part 11 expectations when paired with validated LIMS or cloud platforms.

Software & Data Management

Data handling follows ALCOA+ principles (Attributable, Legible, Contemporaneous, Original, Accurate, Complete, Consistent, Enduring, Available). Measurement results are stored internally with full context: method name, electrode ID, calibration coefficients, ambient conditions, and user credentials. Export options include USB flash drive (CSV, PDF), RS-232 printer output (configurable templates), and PC connectivity via dedicated Windows software supporting spectral curve visualization, statistical summaries (mean, SD, RSD), and trend analysis. U盘-based method import/export enables standardized protocol deployment across instrument fleets. Network-ready RJ45 and Wi-Fi interfaces allow secure HTTPS-based upload to private cloud repositories or enterprise LIMS—enabling remote validation, centralized audit review, and automated report generation without local workstation dependency.

Applications

• Environmental labs: Surface water, groundwater, wastewater, and effluent monitoring per EPA Method 150.1 (conductivity), 365.2 (pH), and 360.2 (DO)
• Food & beverage: White sugar ash content (GB/T 10498), HFCS ash analysis, and process water quality verification
• Pharmaceutical water systems: Purified water (PW) and water for injection (WFI) conductivity testing per USP , EP 2.2.38
• Academic research: Ion speciation studies (Na⁺, K⁺, NH₄⁺, F⁻, Cl⁻), salinity-dependent metabolic rate assays, and corrosion inhibitor efficacy screening
• Calibration facility support: Reference electrode verification, conductivity standard validation, and DO sensor performance qualification

FAQ

Does the DZS-708TP support ASTM D1125-compliant conductivity measurements?
Yes—the instrument implements automatic temperature compensation using both linear and non-linear algorithms aligned with ASTM D1125 Annex A1, and supports cell constants from 0.01 to 10 cm⁻¹.

Can it perform GRAN plot titrations for weak acid analysis?
Yes—pH/pX module includes GRAN method implementation for precise equivalence point determination in potentiometric titrations.

Is the polarographic DO probe compatible with membrane replacement and electrolyte refilling?
Yes—standard Clark-type DO sensors used with this analyzer feature field-serviceable membranes and refillable KCl electrolyte compartments.

What level of cybersecurity does the Wi-Fi interface provide?
The embedded Wi-Fi module supports WPA2-Enterprise authentication and TLS 1.2 encrypted data transmission to prevent unauthorized network access or data interception.

How is firmware update performed, and is rollback capability available?
Firmware upgrades are conducted via USB stick using signed binary packages; versioned backups are retained automatically, allowing verified rollback to prior stable releases if required.