CLEAN DOZ30 Dissolved Ozone Meter

Overview

The CLEAN DOZ30 Dissolved Ozone Meter is a handheld, field-deployable amperometric analyzer engineered for precise, real-time quantification of dissolved ozone (O₃) in aqueous systems. Utilizing a three-electrode electrochemical cell configuration—comprising a working electrode, counter electrode, and reference electrode—the instrument delivers stable, interference-resistant measurements based on Faraday’s law of electrolysis. Unlike colorimetric methods (e.g., DPD), which require reagents, sample preparation, and are susceptible to turbidity or residual oxidants, the DOZ30 operates reagent-free and provides direct electrochemical response proportional to dissolved ozone concentration. Its design targets critical applications where rapid, repeatable, and maintenance-light monitoring is essential: municipal drinking water disinfection validation, swimming pool & spa ozone dosing control, pharmaceutical water system verification (PW/WFI), and clinical sterilization process support. The sensor’s membrane-covered cathode selectively reduces ozone at a fixed polarizing voltage, generating a current linearly correlated to O₃ concentration—enabling trace-level detection down to 0.01 ppm with ±1% full-scale accuracy across 0–10.00 ppm.

Key Features

• Three-electrode amperometric sensing architecture ensures high specificity for dissolved ozone, minimizing cross-sensitivity to chlorine, chloramines, hydrogen peroxide, or nitrate.
• IP67-rated housing enables submersion up to 1 m for 30 minutes—suitable for surface water sampling, open-channel effluent checks, and splash-prone facility environments.
• CS6930 replaceable ozone sensor features a gas-permeable membrane and integrated electrolyte reservoir; no refilling required, and electrode replacement is tool-free via twist-lock interface.
• Auto-hold function activates upon stable reading (±0.02 ppm for 3 sec), supporting single-hand operation during throw-in or dip-style measurements in tanks, pipes, or reservoirs.
• Self-diagnostic display indicates electrode health status—including membrane integrity, electrolyte saturation, and catalytic surface activity—reducing uncertainty in calibration validity.
• Backlit LCD (20×30 mm) supports dual-parameter viewing: dissolved ozone concentration (ppm) and simultaneous temperature (°C/°F), with 120° viewing angle optimized for overhead or angled inspection.
• Zero-consumable operation: no reagents, no membranes to replace routinely, no buffer solutions—lowering total cost of ownership and eliminating disposal compliance concerns.

Sample Compatibility & Compliance

The DOZ30 is validated for use in potable water, ultrapure water (UPW), cooling tower make-up, wastewater effluent, and ozonated process streams with turbidity ≤400 NTU and temperature 0–100.0°C. It complies with ASTM D6508-21 (Standard Test Method for Determination of Dissolved Ozone in Water by Electrochemical Detection) and aligns with ISO 15705:2021 (Water quality — Determination of ozone — Amperometric method). While not a GLP/GMP-certified system out-of-the-box, its two-point calibration protocol (zero + span), audit-ready calibration log (via optional PC software), and stable baseline drift (<0.05 ppm/24 h at 25°C) support integration into FDA 21 CFR Part 11–aligned workflows when paired with documented SOPs and electronic record management.

Software & Data Management

The DOZ30 operates as a standalone instrument but supports data export via optional CLEAN DataLink USB adapter and CLEAN Logger Pro v3.2 software (Windows/macOS). This platform enables time-stamped measurement logging, calibration history archiving, electrode performance trending, and CSV export compatible with LIMS and ELN systems. All stored records include operator ID, location tag, ambient temperature, and sensor diagnostic flags—facilitating traceability under ISO/IEC 17025 or EPA Method 1603 audit requirements.

Applications

• Verification of ozone residual in municipal drinking water distribution networks post-contact tank.
• Real-time monitoring of ozone dose in swimming pool recirculation lines to maintain 0.1–0.4 ppm CT value compliance.
• Validation of ozone sparging efficiency in pharmaceutical purified water (PW) storage and distribution loops per USP .
• Field assessment of ozone generator output stability during commissioning or preventive maintenance cycles.
• Research-grade dissolved ozone kinetics studies in advanced oxidation process (AOP) pilot systems.

FAQ

Does the DOZ30 require daily calibration?
No—calibration is recommended before each measurement session or after electrode replacement; two-point calibration (zero in deionized water + span in certified ozone standard) ensures traceable accuracy.
Can the CS6930 electrode be cleaned in situ?
Yes—gentle wiping with lint-free cloth and rinsing with DI water restores membrane performance; avoid solvents or abrasive pads.
Is temperature compensation automatic?
Yes—the built-in NTC thermistor performs real-time, non-linear temperature compensation per ASTM D6508 Annex A1.
What is the expected service life of the CS6930 electrode?
Under typical use (≤4 hrs/day, pH 6–8, <50°C), the electrode maintains specification for ≥18 months; diagnostic indicators alert users to declining signal-to-noise ratio.
Does the DOZ30 meet NIST-traceable calibration requirements?
When calibrated using NIST-traceable ozone standards (e.g., O₃-in-N₂ certified gas permeation devices with aqueous transfer validation), measurement results are traceable to SI units per ISO/IEC 17025 Clause 6.6.