Technical Parameters for ABB 4641/800 Dissolved Oxygen Monitors/Transmitter

The ABB 4641/800 Dissolved Oxygen Monitor/Transmitter is a high-precision analytical instrument designed for continuous and reliable dissolved oxygen (DO) measurement in industrial water treatment, aquaculture, environmental monitoring, and process control applications. Below are its key technical specifications and features:

General Specifications

• Model: ABB 4641/800
• Manufacturer: ABB Measurement & Analytics
• Type: Dissolved Oxygen Transmitter with Sensor Integration
• Application:
  • Municipal and industrial wastewater treatment
  • Aquaculture (fish farming, shrimp ponds)
  • Power plant cooling systems
  • Environmental monitoring (rivers, lakes, oceans)
  • Food and beverage processing
  • Pharmaceutical and biotech industries

Technical Parameters

Measurement Range & Accuracy

• Dissolved Oxygen (DO) Range:
  • 0–20 mg/L (ppm) or 0–200% saturation
  • Optional extended range (e.g., 0–50 mg/L for hyperoxic conditions)
• Accuracy:
  • ±1% of reading or ±0.01 mg/L (whichever is greater)
• Resolution: 0.001 mg/L (or 0.01% saturation)
• Response Time: < 90 seconds (T90, depending on flow and conditions)

Sensor Technology

• Type: Polarographic (clark-type) or optical (luminescent) sensor (user-selectable)
• Polarographic Sensor:
  • Requires membrane replacement (typically every 6–12 months)
  • Electrolyte refillable (low maintenance)
• Optical Sensor:
  • No membrane or electrolyte required
  • Longer lifespan (2–3 years)
  • Immune to hydrogen sulfide (H₂S) interference
• Temperature Compensation: Automatic (0–50°C)
• Pressure Compensation: Optional (for deep-water applications)

Electrical & Environmental Specifications

• Power Supply:
  • 24 VDC (18–36 VDC)
  • Optional 110/220 VAC (with power supply unit)
• Output Signals:
  • 4–20 mA (isolated, programmable)
  • HART® digital communication
  • Modbus RS-485 (optional)
• Display: Backlit LCD with real-time DO, temperature, and status
• Housing: IP66/NEMA 4X (weatherproof, corrosion-resistant)
• Operating Temperature: -10°C to +60°C (14°F to 140°F)
• Storage Temperature: -20°C to +70°C (-4°F to 158°F)

Calibration & Maintenance

• Calibration:
  • Air-saturated water (100% saturation) or zero-oxygen solution
  • Single-point or two-point calibration
• Self-Diagnostics:
  • Sensor health monitoring (membrane integrity, electrolyte level)
  • Fault detection (low battery, communication error, out-of-range)
• Maintenance Interval:
  • Polarographic: Membrane replacement every 6–12 months
  • Optical: Sensor cleaning every 3–6 months

Approvals & Compliance

• Certifications: CE, UL, CSA, ATEX (for hazardous areas)
• EMC Compliance: EN 61326-1, IEC 61000-6-2
• RoHS Compliance: Yes

Key Features

• Dual-Input Capability:
  • Simultaneous measurement of DO and temperature (or pH, conductivity with optional sensors)
• Advanced Diagnostics:
  • Predictive maintenance alerts
  • Sensor drift compensation
• Data Logging:
  • Internal memory for up to 30 days of data (optional)
  • USB export for trend analysis
• Flexible Mounting:
  • Panel, pipe, or wall mounting
  • Submersion-ready (for immersed installations)
• Multi-Language Display: English, Spanish, French, German, Chinese, etc.

Applications & Benefits

• Wastewater Treatment:
  • Optimize aeration control for energy savings
  • Compliance with regulatory discharge limits
• Aquaculture:
  • Prevent fish kills due to low DO
  • Optimize feeding schedules based on oxygen levels
• Power Plants:
  • Protect condenser cooling systems from biofouling
  • Monitor DO in cooling water intakes
• Environmental Monitoring:
  • Assess water quality in rivers, lakes, and oceans
  • Detect hypoxia events in real time

Optional Accessories

• Flow Cell: For high-accuracy DO measurement in closed-loop systems
• Retraction Cable Assembly: For immersed sensors in deep tanks
• Calibration Kit: Includes zero-oxygen solution and calibration vials
• Remote Display Unit: For monitoring from a control room

Warranty & Support

• Warranty: 2 years (extendable to 5 years with service contract)
• Technical Support: 24/7 global support via ABB’s service network
• Spare Parts: Available for 10+ years after discontinuation

For custom configurations (e.g., explosion-proof, ATEX-certified, or marine-grade), contact ABB Measurement & Analytics directly.

Would you like additional details on sensor compatibility, installation guidelines, or comparison with other ABB dissolved oxygen analyzers (e.g., ChloroStar™ or UviTec™)?