DO-110 Fluorescent Dissolved Oxygen Sensor (Titanium)

Overview

The DO-110 is a premium fluorescent dissolved oxygen sensor featuring titanium alloy construction for ultimate corrosion resistance in marine and seawater environments. Utilizing the same advanced optical technology as the DO-100, the titanium body ensures decades of reliable service in the most demanding saltwater applications including seawater aquaculture, oceanographic research, and coastal monitoring.

Key Features

• Titanium Construction: Ultimate corrosion resistance for seawater and marine environments
• Fluorescent Technology: No oxygen consumption, stable readings
• Wide Measurement Range: 0-20 mg/L and 0-200% saturation
• Salinity Compensation: Salinity compensation supported for fresh, brackish, and saline water
• Automatic Temperature Compensation: Built-in automatic temperature compensation
• Digital Output: RS485 Modbus RTU communication
• IP68 Waterproof: Fully submersible operation
• Long Cable Options: Standard 5m, extendable to 100m
• Replaceable Cap: Replaceable membrane cap
• Lightweight: Lightweight titanium construction for easy handling

Applications

• Marine and seawater aquaculture
• Offshore fish and shrimp farming
• Oceanographic research and monitoring
• Coastal and estuarine studies
• Marine biology research
• Coral reef monitoring
• Desalination plant monitoring
• Offshore platforms
• Hypersaline environment monitoring
• Submarine and ROV operations

Why Titanium for Seawater

Titanium provides unmatched performance in marine environments:

Superior Corrosion Resistance:

• Absolute corrosion immunity in seawater
• No pitting or crevice corrosion
• Decades of service life
• Self-healing passive oxide layer

Marine Performance:

• High chloride resistance (19,000+ ppm in seawater)
• Biofouling-resistant smooth surface
• No metal ion contamination
• Non-magnetic properties

Physical Advantages:

• Excellent strength-to-weight ratio
• Lightweight titanium construction
• Temperature stable across range
• Biocompatible with marine life

Technical Specifications

The DO-110 uses fluorescent quenching technology where dissolved oxygen quenches the fluorescence of a special dye. The titanium body provides unmatched corrosion resistance while maintaining the same proven optical measurement technology.

Dissolved Oxygen in Seawater

Typical DO levels in marine environments:

• Healthy ocean water: 6-8 mg/L (lower than freshwater due to salinity)
• Marine aquaculture: > 5 mg/L required, > 6 mg/L optimal
• Shrimp farming: > 4 mg/L minimum, > 5 mg/L optimal
• Hypoxic zones: < 2 mg/L

Seawater holds less oxygen than freshwater due to higher salinity. The DO-110’s automatic temperature compensation and salinity compensation ensure accurate measurements across all marine conditions.

Installation and Operation

The DO-110 is designed for easy deployment in marine environments with vertical or horizontal mounting. The titanium construction allows for long-term installation in harsh saltwater conditions with minimal maintenance.

Calibration uses simple one-point air calibration method. Calibration frequency depends on the water type and the amount of biofouling and algae around the sensor. Under normal conditions calibration is needed every 6-8 months, with regular cleaning recommended in between.

Maintenance consists of periodic cleaning to remove marine biofouling (barnacles, algae, marine growth). The membrane cap is replaceable, typically after 2+ years of use.

Marine Applications

Seawater Aquaculture

• Offshore cage culture monitoring
• Sea-based fish and shrimp farming
• Multiple sensors for large operations
• Automated aeration control
• Emergency low-oxygen alerts

Oceanographic Research

• Long-term moored deployments
• Hypoxia and dead zone studies
• Coastal ecosystem monitoring
• Climate change impact assessment
• Vertical profiling studies

Coastal Monitoring

• Estuary water quality
• Outfall monitoring
• Tidal effect studies
• Environmental compliance

Connectivity and Integration

The DO-110’s RS485 Modbus RTU interface enables:

• Research vessel systems
• Moored buoy networks
• Wireless satellite telemetry
• ROV/AUV integration
• Aquaculture SCADA systems
• Early warning systems

DO-110 vs. DO-100 Comparison

Choose DO-110 (Titanium) for:

• Seawater and marine environments
• Long-term offshore deployment
• Harsh saltwater conditions
• Oceanographic research
• Premium commercial aquaculture

Choose DO-100 (316L Stainless) for:

• Freshwater or occasional saltwater
• Industrial wastewater treatment
• Protected installations
• Freshwater and light industrial monitoring

Why Choose DO-110

• Ultimate durability: Titanium lasts decades in seawater
• Professional quality: Oceanographic-grade sensor
• Low maintenance: Resistant to marine corrosion
• Lightweight: Easier handling and installation
• Proven technology: Fluorescent method used worldwide
• Salinity compensation: Supported for fresh, brackish, and saline water