Oakton DO600 Dissolved Oxygen Meter
| Origin | USA |
|---|---|
| Manufacturer Type | Authorized Distributor |
| Origin Category | Imported |
| Model | 35418-00 |
| Instrument Type | Benchtop Laboratory Meter |
| Measurement Principle | Electrochemical Galvanic Cell Probe |
| Measurement Range | 0.00–80.00 mg/L (ppm) |
| Accuracy | ±0.2 mg/L |
| Repeatability | ±0.05% of reading |
| Detection Limit | 0.00 mg/L with ±2% relative error |
Overview
The Oakton DO600 Dissolved Oxygen Meter (Model 35418-00) is a precision benchtop instrument engineered for reliable, traceable measurement of dissolved oxygen (DO) concentration in aqueous environmental, wastewater, and laboratory samples. It employs a galvanic cell-type electrochemical probe—requiring no external polarization voltage—which delivers stable, low-maintenance operation and rapid response kinetics (t₉₀ < 60 s in stirred water). The meter simultaneously displays DO in mg/L (ppm), % saturation, and temperature (°C or °F), with automatic temperature compensation (ATC) across –10 to 110 °C. Designed for compliance-driven environments, the DO600 supports calibration verification logs and meets essential functional requirements for EPA Method 360.1, ASTM D888, and ISO 5814:2012 (electrochemical determination of dissolved oxygen).
Key Features
- Galvanic DO probe technology: Self-polarizing, zero-power-consumption sensor with integrated thermistor for real-time ATC.
- Broad measurement range: 0.00–80.00 mg/L DO and 0–600% saturation, suitable for hypoxic, normoxic, and hyperoxic conditions—including high-salinity or low-temperature applications.
- High metrological integrity: ±0.2 mg/L absolute accuracy at 25 °C and 1 atm; repeatability ≤0.05% of full-scale reading under controlled agitation.
- IP67-rated housing: Dust-tight and submersible up to 1 m for 30 minutes—enabling field-deployable use without compromise on lab-grade performance.
- Dual-display interface: Simultaneous readout of DO (mg/L and % sat) and temperature, with clear electrode status indicators and on-screen calibration prompts.
- Integrated data management: Stores up to 500 GLP-compliant measurements with timestamps, operator ID fields, calibration history, and probe serial number tagging.
- Flexible connectivity: RS232 output with optional IRDA adapter for direct transfer to LIMS or spreadsheet software; compatible with Oakton’s PC-based data logging suite.
Sample Compatibility & Compliance
The DO600 is validated for use with freshwater, seawater, wastewater effluents, fermentation broths, and potable water matrices. Its galvanic probe exhibits minimal flow dependence above 10 cm/s, ensuring robustness across static incubation vessels and flowing process streams. For regulatory reporting, the system supports audit-ready documentation per 21 CFR Part 11 (when used with compliant software and access controls), and aligns with GLP/GMP data integrity expectations through mandatory calibration event logging and user authentication fields. Calibration is performed using either air-saturation (100% sat) or Winkler titration reference standards, satisfying method validation requirements under US EPA and EU Water Framework Directive protocols.
Software & Data Management
The included Windows-compatible software enables secure download, visualization, and export of measurement datasets in CSV, TXT, or PDF formats. Each record includes embedded metadata: date/time stamp, temperature, atmospheric pressure (manually entered or via optional barometric sensor), calibration parameters, and operator ID. Audit trails capture all configuration changes and calibration events, supporting traceability in accredited laboratories. Data files are digitally signed and timestamped to prevent tampering—meeting minimum ALCOA+ (Attributable, Legible, Contemporaneous, Original, Accurate) principles for environmental monitoring records.
Applications
- Environmental monitoring: Routine DO profiling in rivers, lakes, estuaries, and groundwater wells per EPA Region-specific QA/QC plans.
- Wastewater treatment: Aeration basin optimization, activated sludge respiration rate assessment, and effluent compliance verification against NPDES permit limits.
- Academic research: Biogeochemical oxygen demand (BOD) and chemical oxygen demand (COD) studies; microbial respiration assays in controlled bioreactors.
- Drinking water safety: Post-disinfection residual oxygen verification and distribution system stagnation analysis.
- Aquaculture and fisheries: Pond and recirculating aquaculture system (RAS) DO monitoring to maintain optimal dissolved oxygen thresholds for species-specific survival and growth.
FAQ
What type of probe does the DO600 use, and how often does it require maintenance?
The DO600 utilizes a replaceable galvanic cell probe (e.g., model 35640-50) with a Teflon membrane and long-life electrolyte gel. Membrane replacement is recommended every 6–12 months depending on sample fouling; full probe recalibration is required after each membrane change.
Does the DO600 compensate for salinity and barometric pressure?
Yes—manual input of salinity (0–80 ppt) and atmospheric pressure (450–825 mmHg) is supported to correct DO saturation values per ISO 5814 and ASTM D888 algorithms.
Can the DO600 be used for field measurements?
Its IP67-rated enclosure and battery-powered operation (with optional AC adapter) make it suitable for both laboratory and field deployment; however, probe stability requires consistent sample agitation during measurement.
Is GLP-compliant data export available?
Yes—500-point internal memory stores GLP metadata, and RS232/IRDA output enables traceable export to validated third-party software meeting 21 CFR Part 11 requirements.
What calibration standards are recommended?
Air-saturated water (100% saturation at known temperature/pressure) is standard; for absolute mg/L verification, certified Winkler titration standards or NIST-traceable DO gas mixtures are advised.
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