Protecting Product Purity Through Accurate “Oxygen Control”

In premium cosmetics manufacturing, where high-value ingredients and rigorous processes define product quality, microbial control is a mission of absolute precision. Ozone, with its strong oxidizing capability and residue-free nature, is widely used to disinfect raw water, production equipment, and packaging materials. However, its concentration must be tightly controlled: too low fails to eliminate heat-resistant bacteria and molds; too high risks oxidizing active ingredients such as vitamins or botanical extracts, compromising product stability.

Dabeco DB771 online analyzer conbined with Germany Reiss OZ1.2 Ozone Sensor, deployed on the production line of a global luxury skincare brand, provides real-time, high-precision ozone monitoring—becoming the “guardian of purity” throughout their manufacturing process.

Industry Challenge: The Delicate Balance of Ozone Concentration

According to the Cosmetics Safety Technical Standard (2022), finished products must meet strict microbial limits:
• Total aerobic count ≤ 500 CFU/g (≤100 CFU/g for eye-area products)
• Yeasts & molds ≤ 100 CFU/g
• No presence of pathogens such as Pseudomonas aeruginosa

Disinfection performance directly determines compliance:

• Raw water disinfection requires 0.1–0.3 ppm ozone to ensure elimination of resistant microorganisms like Pseudomonas aeruginosa.
• CIP cleaning of emulsifying tanks and pipelines requires 0.5–1.0 ppm to break down biofilms.
• Residual ozone must be ≤0.05 ppm to avoid reacting with antioxidant ingredients such as CoQ10 or tea polyphenols.

Previously, the manufacturer relied on manual iodometric titration, which caused:
• Insufficient accuracy: ±0.05 ppm deviation led to under-disinfection (0.08 ppm) or over-oxidation (>1.2 ppm), causing product discoloration.
• Slow response: 30-minute delay—during which ozone decayed by 40%—prevented real-time adjustments.
• Poor compatibility: Raw water surfactants caused readings to drift upward by ~30%.

OZ1.2 Solution — Micron-Level Sensing Performance

1. Precision Measurement with Ultra-High Resolution

The OZ1.2 model offers a measurement range of 0.005–2.000 ppm with 0.001 ppm resolution and <1% accuracy in the critical 0.1–1.0 ppm window.
During raw-water disinfection, the sensor detects minute fluctuations (0.001 ppm) around the 0.2 ppm target, ensuring ozone remains precisely within the validated process range.
Its membrane-covered amperometric technology minimizes interference from surfactants (error <2%), providing far more reliable results than titration.

2. Rapid Response & Broad Environmental Compatibility

• T90 ≈ 15 seconds — essential for fast-moving packaging-tunnel disinfection lines
• pH tolerance 2–11 — suitable for weak-acidic raw water (pH 5.5–6.5) and weak-alkaline CIP cleaning (pH 8–8.5)
• IP68 protection & 45°C resistance — enabling immersion installation in circulating pipelines

3. Intelligent Integration for Closed-Loop Automation

With Modbus-RTU and 4–20 mA outputs, DOZ1.2 connects directly to PLC systems:
• Below target → Automatically boosts ozone generation
• Above upper limit → Triggers nitrogen purging to reduce concentration

During an eye-cream tank disinfection cycle, for example, the system restored ozone from 0.85 ppm back to 0.75 ppm within 10 seconds, preventing oxidation of sensitive actives.

Applications Across the Entire Sterile Production Chain

Raw Water Preparation

OZ1.2 ensures 0.2 ppm ozone at the DI-water outlet.
When concentration falls to 0.15 ppm, the system instantly compensates.
Result: water-quality pass rate increased from 92% → 100%, eliminating batch rejection caused by raw-water contamination.

CIP Cleaning of Emulsification Equipment

During ozone-based CIP, concentration must climb from 0.3 ppm to 0.8 ppm and remain stable for 10 minutes.
The sensor records the full curve and auto-extends cleaning time if levels fall short (e.g., due to spray-nozzle blockage).
Result: equipment sterility rate reached 99.5%, cleaning-agent consumption reduced by 20%.

Packaging Material Disinfection

Installed at the outlet of the acrylic-bottle disinfection tunnel, OZ1.2 monitors residual ozone (<0.05 ppm).
If exceeded, UV decomposition automatically activates.
Result: product discoloration complaints decreased from 3 cases/month → 0.

Impact — Elevating Quality and Efficiency

• Quality: Finished-product microbial compliance increased from 95% to 100%;
active ingredient retention improved by 8%, extending shelf life by 3 months.

• Cost & Efficiency: Ozone-generator energy usage decreased by 15%, saving approx. ¥60,000 annually;
manual testing reduced from hourly to weekly, saving ¥120,000 in labor per year.

• Compliance: Automatic data logging supports one-year traceability, fulfilling Cosmetics GMP requirements.

With its ultra-precise, real-time ozone monitoring, W771-DOZ1.2 safeguards both microbiological safety and formulation stability—empowering premium cosmetics manufacturers to achieve “sterile production + active-ingredient protection” with confidence.