Leici JPSJ-606T Dissolved Oxygen Meter

Overview

The Leici JPSJ-606T Dissolved Oxygen Meter is a benchtop laboratory instrument engineered for precise, reproducible quantification of dissolved oxygen (DO) concentration in aqueous samples using the Clark-type polarographic sensor principle. This electrochemical method relies on diffusion-controlled reduction of molecular oxygen at a cathode (typically gold or platinum) under a fixed applied potential, generating a current linearly proportional to DO partial pressure—converted to concentration (mg/L or ppm) via temperature-, pressure-, and salinity-compensated algorithms. Designed for routine water quality assessment in environmental monitoring labs, municipal wastewater facilities, aquaculture research, and pharmaceutical process water validation, the JPSJ-606T delivers stable baseline performance across varying matrix conditions while maintaining strict adherence to internationally recognized measurement protocols.

Key Features

• High-resolution color LCD touchscreen interface with intuitive icon-driven navigation and dual-language (English/Chinese) support
• Integrated polarographic DO probe with built-in thermistor for real-time temperature sensing and automatic temperature compensation (ATC)
• Multi-parameter compensation engine supporting manual or automatic atmospheric pressure correction (units: kPa, mbar, Torr, atm) and user-defined salinity adjustment
• Intelligent endpoint detection algorithm enabling auto-read, timed-read, interval-read, and manual acquisition modes—optimized for both single-point verification and kinetic DO profiling
• Firmware-upgradable architecture allowing field-deployable enhancements to measurement logic, data handling, and compliance reporting modules
• IP54-rated enclosure ensuring operational reliability in humid or splash-prone laboratory environments
• Comprehensive security framework including role-based user authentication (administrator/operator tiers), password enforcement, and encrypted operation logging

Sample Compatibility & Compliance

The JPSJ-606T is validated for use with freshwater, seawater, wastewater effluents, drinking water, and process water samples within standard environmental and industrial testing scopes. Its polarographic sensor design minimizes interference from common redox-active species (e.g., sulfides, ferrous ions) when operated within specified flow-rate and stirring conditions. The instrument conforms to core elements of ISO 5814:2012 (Water quality — Determination of dissolved oxygen — Electrochemical probe method) and supports regulatory alignment with EPA Method 360.1 and ASTM D888-22. Full GLP documentation—including calibration event logs, electrode history, user attribution, and timestamped measurement records—is retained onboard and exportable. Audit trails meet GMP requirements per FDA 21 CFR Part 11 for electronic records and signatures, enabling full data lineage reconstruction during internal audits or regulatory inspections.

Software & Data Management

Data integrity is enforced through a structured, non-volatile memory system storing up to 1000 complete measurement sets—including DO value, temperature, pressure, salinity, electrode ID, calibration status, operator ID, and acquisition timestamp. All records are organized chronologically and searchable by parameter range or metadata tag. Export options include direct RS-232 printing (with customizable report templates), USB mass-storage transfer to PC, and secure bidirectional communication with Leici’s proprietary desktop software for statistical analysis (mean, SD, RSD, trend charts) and LIMS integration via standardized ASCII or CSV protocols. U-disk read/write capability enables offline method deployment and firmware updates; optional barcode scanner input streamlines sample ID entry during high-throughput workflows.

Applications

• Environmental laboratories conducting surface water, groundwater, and effluent DO profiling per national monitoring programs
• Wastewater treatment plants performing aeration basin optimization, nitrification/denitrification control, and discharge compliance verification
• Aquaculture facilities monitoring pond and recirculating aquaculture system (RAS) oxygen levels to prevent hypoxia stress
• Pharmaceutical and biotechnology sites validating purified water (PW) and water-for-injection (WFI) systems per USP and EU Annex 1
• Academic and research institutions studying aerobic biodegradation kinetics, sediment oxygen demand (SOD), and microbial respiration rates

FAQ

What electrode technology does the JPSJ-606T employ?
It uses a Clark-type polarographic dissolved oxygen sensor with a gas-permeable membrane, silver/silver chloride reference electrode, and gold cathode—requiring periodic electrolyte refilling and membrane replacement per manufacturer guidelines.
Does the instrument support automatic pressure compensation?
Yes—barometric pressure can be entered manually or measured automatically via an optional external digital barometer connected through the RS-232 interface.
How is data traceability ensured for regulatory submissions?
Each stored record includes immutable metadata (user ID, calibration certificate ID, electrode serial number, environmental parameters), and all system operations generate time-stamped audit entries compliant with 21 CFR Part 11 electronic record requirements.
Can the JPSJ-606T interface with automated sampling systems?
Yes—it features TTL-level trigger I/O and protocol-compatible serial commands enabling seamless integration with third-party autosamplers for unattended batch analysis of up to 96 samples.
Is firmware update performed locally or remotely?
Updates are installed locally via USB flash drive using signed firmware packages verified by embedded cryptographic checksums—no cloud dependency or internet connection required.