O3-100 Ozone Sensor

Overview

The O3-100 is an advanced sensor specifically designed for measuring dissolved ozone (O3) concentration in water. Ozone is a powerful oxidant used for water disinfection, color removal, and advanced oxidation processes. This sensor is essential for water treatment plants, aquaculture systems, food processing facilities, and industrial applications requiring precise ozone monitoring.

Key Features

• High Sensitivity: Measures from 0.01 to 20.00 mg/L (ppm)
• Fast Response: Results within 60 seconds
• Digital Output: RS485 Modbus RTU for seamless integration with SCADA and IoT systems
• Automatic Temperature Compensation: Integrated PT1000 sensor for accurate readings
• Direct Connection: Connect directly to computer or PLC without additional instrumentation
• High Protection: IP68 waterproof rating ensures reliable operation
• No Consumables: Electrochemical sensor requires no reagents

Applications

• Drinking water treatment plants
• Wastewater treatment and reuse
• Aquaculture water disinfection
• Swimming pool and spa ozonation
• Food and beverage processing
• Pharmaceutical water systems
• Cooling tower water treatment
• Bottled water production
• Advanced oxidation processes (AOPs)
• Color and odor removal
• Industrial process water
• Laundry and textile applications

Technical Specifications

The O3-100 delivers precise ozone measurements from 0.01 to 20.00 mg/L with automatic temperature compensation via the integrated PT1000 sensor. The electrochemical sensor technology specifically detects dissolved O3, providing accurate real-time monitoring for process control and safety.

Understanding Ozone in Water Treatment

Ozone is one of the most powerful oxidants used in water treatment:

Advantages

• Powerful Disinfection: More effective than chlorine against bacteria, viruses, and protozoa
• No Harmful Byproducts: Does not produce trihalomethanes (THMs) or chlorinated compounds
• Oxidation Power: Removes color, taste, and odor compounds
• No Residue: Decomposes to oxygen, leaving no chemical residue
• Broad Spectrum: Effective against resistant organisms like Cryptosporidium

Applications by Concentration

• Disinfection: 0.1-0.4 mg/L
• Color/Odor Removal: 0.5-2.0 mg/L
• Advanced Oxidation: 2.0-10.0 mg/L
• Industrial Processes: 5.0-20.0 mg/L

Ozone Monitoring Importance

Accurate ozone monitoring is critical for:

• Process Control: Optimizing ozone dosing for efficiency
• Safety: Preventing overdosing and monitoring off-gas levels
• Regulatory Compliance: Meeting water quality standards
• Cost Optimization: Reducing ozone generation costs
• Equipment Protection: Preventing damage from excess ozone

Connectivity and Integration

The O3-100 supports dual output for integration into water treatment and disinfection control systems:

RS485 Modbus RTU:

• Connect to Agrinovo Omni Genesis or Exodus controllers for cloud-based ozone monitoring
• Multi-drop bus networking (up to 32 sensors per bus)
• Standard Modbus registers for O3 concentration and temperature
• Compatible with SCADA, PLC, and ozone generator control systems

RS485 Modbus RTU Output:

• Direct connection to ozone generator dosing controllers for residual management
• Feedback loop control for maintaining target ozone residual
• Scalable output range mapped to measurement range

IoT Integration:

• Pair with Omni Genesis/Exodus for remote ozone monitoring and dosing control
• Set automated alerts for under-dosing (disinfection failure) or over-dosing (equipment damage)
• Historical data logging for CT compliance documentation
• Monitor ozone decay curves for contact chamber optimization

Installation and Maintenance

Positioning: Install after the ozone contact chamber at a point where residual ozone reflects treatment effectiveness. For distribution monitoring, install at representative points in the network. Use ozone-resistant materials (PTFE, stainless steel, PVDF) for all wetted components in the sample line.

Calibration: Two-point calibration using freshly ozonated water cross-referenced with the indigo colorimetric method (Standard Methods 4500-O3). Ozone degrades rapidly - calibrate quickly. Recalibrate every 1-2 weeks.

Material Compatibility: Ozone is a strong oxidant that degrades rubber, PVC, and many plastics. Use PTFE tubing, ozone-resistant gaskets, and stainless steel fittings in the sample delivery system. Inspect seals and tubing monthly for degradation.

Safety Considerations

Ozone is a powerful oxidant and must be carefully controlled:

• Monitor residual ozone to prevent equipment corrosion
• Ensure proper ventilation in ozone generation areas
• Follow safety guidelines for ozone handling
• Maintain appropriate contact time for effective disinfection

Related Guide: Dissolved Ozone Monitoring in Water Treatment: Sensors, Methods & Best Practices