LoHua LH-JE113 Multi-Parameter Water Quality Analyzer

Overview

The LoHua LH-JE113 Multi-Parameter Water Quality Analyzer is a benchtop laboratory instrument engineered for precise, repeatable quantification of key water quality parameters in compliance with standard analytical methods. It employs dual detection modalities—spectrophotometric colorimetry for parameters such as COD, ammonia nitrogen, total phosphorus, and nitrate, and electrochemical sensing for pH, conductivity, dissolved oxygen (DO), and oxidation-reduction potential (ORP). Designed for trace-level accuracy and inter-laboratory reproducibility, the system integrates optical path stabilization, temperature-compensated electrode interfaces, and calibrated reagent delivery to minimize operator-dependent variability. Its architecture conforms to fundamental requirements for method validation under ISO/IEC 17025-accredited laboratories and supports routine use in environmental testing workflows aligned with EPA Method 410.4, ISO 6060 (COD), ISO 7888 (conductivity), and APHA Standard Methods 4500-NH₃ F and 4500-P E.

Key Features

• Benchtop modular design optimized for space-constrained lab environments, with integrated sample handling tray and reagent storage compartment
• Pre-programmed method library covering over 30 parameters—including COD (0–1500 mg/L), NH₃-N (0–50 mg/L), TP (0–10 mg/L), NO₃⁻-N (0–20 mg/L), pH (0.00–14.00), EC (0–200 mS/cm), DO (0.0–20.0 mg/L), and ORP (−1999 to +1999 mV)
• Auto-zeroing spectrophotometer with 320–1100 nm wavelength range, ±1 nm photometric accuracy, and dual-beam optical compensation
• Multi-electrode interface supporting interchangeable pH, ORP, conductivity, and Clark-type DO probes with automatic temperature compensation (ATC)
• Onboard calibration verification using NIST-traceable standards; full audit trail for calibration events, including date, operator ID, and deviation logs
• USB and RS-232 connectivity for data export; optional Ethernet module available for LAN integration and remote diagnostics

Sample Compatibility & Compliance

The LH-JE113 accepts liquid samples in standard 10–50 mL volumetric vessels or cuvettes (10 mm pathlength), accommodating raw wastewater, treated effluent, surface water, groundwater, and process water from industrial pretreatment systems. Sample matrices with turbidity ≤ 500 NTU and suspended solids ≤ 100 mg/L are supported without filtration—provided colorimetric interferences (e.g., high chloride in COD digestion) are mitigated per method-specific pretreatment protocols. The analyzer meets CE marking requirements for electromagnetic compatibility (EN 61326-1) and safety (EN 61010-1). Its software architecture supports GLP-compliant operation, including user access levels (admin/operator/auditor), electronic signature capability, and 21 CFR Part 11–ready audit trail generation when deployed with validated LIMS integration.

Software & Data Management

Equipped with LoHua Analytical Suite v3.2 firmware, the LH-JE113 provides intuitive touchscreen navigation, real-time measurement visualization, and automated calculation of derived indices (e.g., BOD₅ estimation from COD/NH₃-N ratios). All measurement data—including raw absorbance values, electrode mV outputs, calibration curves, and QC check results—are timestamped and stored internally (≥ 10,000 records) with optional cloud backup via secure HTTPS API. Export formats include CSV, PDF reports (with embedded QA/QC flags), and XML for seamless ingestion into ELN or LIMS platforms. Firmware updates are delivered via signed firmware packages to ensure integrity and version traceability across instrument fleets.

Applications

• Regulatory monitoring labs performing routine compliance testing against national discharge standards (e.g., China’s GB 8978-1996, EU Urban Wastewater Treatment Directive)
• Municipal wastewater treatment plants conducting influent/effluent characterization and process optimization
• Environmental consulting firms executing site assessment and remediation verification studies
• Research institutions investigating nutrient cycling, eutrophication dynamics, or electrochemical sensor response in complex aqueous media
• Petrochemical and agro-industrial facilities managing pretreatment performance and regulatory reporting for NPDES or discharge permits
• Academic teaching laboratories where method transparency, student-accessible calibration routines, and standardized SOP execution are pedagogically essential

FAQ

Does the LH-JE113 support ASTM or ISO-certified test methods?
Yes—the instrument’s preloaded protocols align with ISO 6060 (COD), ISO 7888 (conductivity), ISO 5815-1 (BOD), and APHA Standard Methods 4500 series for nitrogen and phosphorus species. Method equivalence documentation is provided upon request.
Can the analyzer be validated for GMP/GLP environments?
Yes—when operated with controlled user permissions, full audit logging, and documented calibration/maintenance records, it satisfies core elements of GLP (OECD Principles) and supports IQ/OQ/PQ validation protocols.
Is third-party LIMS integration supported?
Yes—via HL7, ASTM E1384, or custom RESTful API configurations. LoHua provides integration test scripts and mapping documentation for common LIMS vendors.
What maintenance is required for long-term stability?
Quarterly optical path verification, semi-annual electrode recalibration using certified reference materials, and annual firmware update review are recommended per LoHua’s Maintenance Schedule M-2023.
Are reagents supplied by LoHua compatible with international equivalents?
All factory-supplied reagent kits meet ISO 8655-6 purity specifications and are cross-validated against Merck, Hach, and Palintest reference standards for interkit comparability.