Dextens 62101 Portable Dissolved Oxygen Analyzer

Overview

The Dextens 62101 Portable Dissolved Oxygen Analyzer is an electrochemical measurement system engineered for high-precision, real-time quantification of dissolved oxygen (DO) in aqueous solutions and oxygen concentration in gaseous phases. Based on galvanic or polarographic oxygen sensing principles—depending on the selected sensor module (e.g., Dextens 51101)—the instrument delivers stable, low-drift performance across a wide dynamic range. Its robust stainless-steel housing, IP65/NEMA 4X rating, and optimized gas diffusion chamber enable reliable operation in demanding industrial environments including brewing, pharmaceutical manufacturing, boiler feedwater monitoring, semiconductor cleanroom utilities, and chemical process control. Designed explicitly for offline and laboratory-based verification—not continuous in-line process monitoring—the 62101 bridges the gap between field portability and metrological rigor, supporting both regulatory-compliant validation workflows and routine QC checks.

Key Features

• Multi-phase measurement capability: Simultaneous support for dissolved oxygen (aqueous phase) and gaseous oxygen (v/v %, ppm) quantification with shared calibration logic and unified data handling.
• High-resolution detection: 0.01 ppb resolution in liquid phase; 0.01 ppm resolution in gas phase—enabling trace-level monitoring required in ultrapure water systems and inert gas blanketing validation.
• Intuitive menu-driven interface: Backlit LCD display showing real-time DO concentration, temperature, date/time stamp, sensor membrane ID (e.g., 82952, 82956), and battery status—no external software required for basic operation.
• Secure configuration management: Password-protected access to calibration parameters, alarm thresholds, unit selection, and system settings to ensure data integrity and audit readiness.
• Dual calibration modes: One-point air-saturation calibration (per ISO 5814 or ASTM D888) or user-defined multi-point direct calibration using certified gas standards—fully traceable to NIST-traceable references.
• Integrated data logging: Automatic or manual storage of up to 1,000 measurement records with timestamp, temperature, and sensor ID metadata; export via RS-232 serial interface compatible with Windows-based desktop software.

Sample Compatibility & Compliance

The 62101 is validated for use with deionized water, process condensates, fermentation broths, boiler feedwater, nitrogen-purged solvents, and compressed air/nitrogen/argon streams. Its Dextens 51101 oxygen sensor employs a proprietary electrolyte-filled galvanic cell with Teflon®-based permeable membrane technology, ensuring minimal drift, rapid response (<60 s to 90% step change), and immunity to flow-rate variations typical in grab-sample analysis. The analyzer complies with key international standards governing oxygen measurement accuracy and documentation integrity—including ISO 5814 (water quality – determination of dissolved oxygen – electrochemical probe method), ASTM D888 (dissolved oxygen in water), and supports GLP/GMP-aligned workflows through full audit trail capability in its companion PC software (e.g., calibration history, operator ID, timestamped results).

Software & Data Management

The included Windows-compatible desktop application enables secure import, visualization, and reporting of stored datasets. Raw files retain native formatting with embedded metadata (sensor serial number, calibration date, ambient temperature). Export options include CSV, Excel (.xlsx), and PDF report generation with customizable headers and compliance footers. The software enforces 21 CFR Part 11–compatible features: electronic signatures, role-based access control, and immutable audit logs for all calibration events and parameter modifications—critical for regulated environments such as pharmaceutical water system qualification (USP ) or biotech process validation.

Applications

• Offline verification of dissolved oxygen in purified water (PW) and water-for-injection (WFI) distribution loops during PQ/UQ phases.
• Oxygen ingress testing in nitrogen-blanketed reactors and packaging lines (e.g., pharmaceutical vials, IV bags).
• Boiler feedwater deaeration efficiency assessment per ASME PTC 19.11 guidelines.
• Monitoring residual oxygen in semiconductor wet benches and DI water rinse tanks.
• Quality control of wort aeration and fermentation tank headspace O₂ in craft and industrial breweries.
• Environmental lab analysis of surface water, wastewater effluents, and aquaculture systems under EPA Method 360.1.

FAQ

What sensor technologies are supported by the 62101 platform?
The instrument is designed exclusively for use with Dextens-certified galvanic oxygen sensors (e.g., model 51101), paired with interchangeable membranes (82952, 82956, 82935) optimized for liquid or gas-phase applications.
Does the analyzer meet FDA 21 CFR Part 11 requirements?
While the hardware itself does not enforce electronic signature controls, the companion software provides full 21 CFR Part 11 functionality—including audit trails, user authentication, and record retention—when deployed in validated IT environments.
Can the 62101 be used for continuous monitoring?
No—it is a portable, batch-oriented analyzer intended for discrete sampling and laboratory verification. For continuous in-line DO monitoring, Dextens offers dedicated process analyzers with 4–20 mA/HART or Modbus RTU outputs.
Is temperature compensation automatic?
Yes—built-in Pt1000 RTD sensor ensures real-time temperature measurement and automatic compensation across the full operating range (0–45 °C), referenced to the Winkler titration standard curve.
What power options are available?
The unit operates on rechargeable Li-ion battery (typical runtime: 12 hours) or external 5 V DC input; no AC adapter is included but universal USB-C power supplies are compatible.