LoHAN LH-E200 Multi-Parameter Portable Water Quality Analyzer

Overview

The LoHAN LH-E200 is a field-deployable, multi-parameter portable water quality analyzer engineered for high-reliability in-situ monitoring across diverse aquatic environments. It operates on standardized electrochemical, optical, and spectrophotometric measurement principles: pH and ORP via glass/reference electrode potentiometry; conductivity, TDS, and salinity via four-electrode AC conductivity cell; dissolved oxygen via Clark-type polarographic or optical luminescence sensing (depending on configured probe); turbidity per ISO 7027 using 860 nm near-infrared LED and 90° scatter detection; chlorophyll-a and phycocyanin via dual-wavelength fluorescence excitation/emission (470/685 nm and 590/650 nm respectively); suspended solids via infrared absorption at 850 nm; and COD and ammonia-nitrogen via preloaded, EPA-compliant colorimetric reagent kits with integrated reflectance photometry (610 nm and 420 nm). The system integrates real-time sensor fusion and digital signal processing to deliver stable, temperature-compensated readings under variable ambient conditions.

Key Features

• Compact handheld form factor with ergonomic grip and 5.0-inch capacitive touchscreen (800 × 480 resolution), optimized for glove-compatible operation in field conditions.
• Three configurable measurement modes: Real-time continuous readout, timer-triggered single-point acquisition, and programmable interval logging (1–3600 seconds).
• Full-digital smart electrode interface with auto-ID recognition — each probe carries embedded EEPROM storing calibration history, serial number, and sensor-specific compensation coefficients.
• Automatic temperature compensation (ATC) applied per parameter using integrated NTC thermistor (±0.1 °C accuracy) and algorithmic correction per ASTM D1129 and ISO 10523 standards.
• Modular probe architecture: supports single-probe operation or multi-probe docking (2–4 sensors simultaneously mounted on unified carrier), enabling concurrent measurement of up to four parameters without cross-interference.
• Robust ingress protection: IP67-rated main unit housing (dust-tight, withstands immersion up to 1 m for 30 min); IP68-rated probes (submersible to 10 m continuously).
• Power management: Rechargeable 7000 mAh Li-ion battery (typical field runtime ≥16 h at 1-min logging interval); USB-C charging and dual-mode operation (battery or external 5 V DC supply); programmable sleep mode with wake-on-button or scheduled wake-up.
• Integrated mechanical design: Removable silicone wrist strap and fold-out polycarbonate desktop stand for hands-free benchtop use or angled viewing in sunlight.

Sample Compatibility & Compliance

The LH-E200 is validated for direct immersion or grab-sample analysis in freshwater, estuarine, wastewater effluent, aquaculture ponds, and industrial process streams. It complies with methodological requirements referenced in APHA Standard Methods 2017 (23rd ed.), EPA Method 180.1 (turbidity), EPA Method 4500-OC B (COD), EPA Method 4500-NH₃ F (ammonia), and ISO 5815-1:2016 (DO). All firmware and data handling routines adhere to GLP principles, including electronic signature support, audit trail logging (user action, timestamp, parameter change), and secure data integrity per IEC 62443-3-3 cybersecurity framework for field instruments. Calibration verification reports meet ISO/IEC 17025 documentation expectations for accredited laboratories.

Software & Data Management

Onboard storage retains ≥10,000 entries per parameter (timestamped, GPS-tagged if optional GNSS module installed), with hierarchical filtering by date range, site ID, operator ID, or measurement status (calibrated/uncalibrated). Data export options include USB mass-storage mode (CSV/Excel-compatible), Bluetooth 5.0 wireless transmission to iOS/Android companion app (LoHAN FieldLink™), and optional thermal Bluetooth printer support (no cloud dependency). Firmware updates are delivered via signed .bin packages with SHA-256 verification. The instrument supports CSV-based import of custom calibration curves and user-defined site libraries.

Applications

• Surface water surveillance programs (rivers, lakes, reservoirs) per national water quality assessment protocols.
• Wastewater treatment plant (WWTP) influent/effluent monitoring and process control feedback loops.
• Aquaculture health management: real-time tracking of DO, NH₃-N, and phytoplankton biomass (chlorophyll-a/phycocyanin) to prevent hypoxia or algal toxicity events.
• Food & beverage facility rinse water and boiler feedwater QC compliance checks.
• Pharmaceutical manufacturing: purified water (PW) and water-for-injection (WFI) pre-screening per USP and EP 2.2.42.
• Academic and environmental research: longitudinal field studies requiring ruggedized, low-maintenance instrumentation with traceable metrology.

FAQ

Does the LH-E200 support regulatory-compliant data reporting for environmental agencies?

Yes — all measurements include embedded metadata (operator ID, location, calibration status, sensor serial), and exported files retain full audit trail records required for EPA NPDES or EU WFD reporting frameworks.
Can calibration be performed in the field without a lab setup?

Yes — the instrument supports one-point and two-point field calibration for pH, ORP, conductivity, DO, and turbidity using NIST-traceable standard solutions; COD and NH₃-N calibrations use pre-vialled reagents with factory-established curves.
Is firmware upgrade capability available post-purchase?

Yes — firmware updates are distributed via LoHAN’s secure customer portal and installed locally via USB-C; version history and release notes are publicly archived.
What is the operating temperature range for both instrument and probes?

Instrument: −10 °C to 50 °C; Probes: −5 °C to 45 °C (standard); optional cryo-rated DO and pH probes extend lower limit to −20 °C.
Are there service and calibration certification options available internationally?

Yes — LoHAN maintains authorized service centers in Germany, Singapore, and Brazil offering ISO/IEC 17025-accredited calibration, repair, and technical training aligned with local metrological requirements.