Industrial Polarographic Dissolved Oxygen Sensor

Industrial Polarographic Dissolved Oxygen Sensor

The Industrial Polarographic Dissolved Oxygen Sensor sets a new standard for reliable and accurate dissolved oxygen (DO) measurement in challenging environments. This advanced sensor features a significant upgrade: a revolutionary grit mesh metal membrane, replacing traditional delicate diaphragms.

This innovative design provides superior mechanical strength and chemical resistance. Unlike conventional diaphragms prone to tearing, fouling, and pressure-induced deformation, the grit mesh metal membrane ensures exceptional stability and stress resistance. It effectively withstands abrasive particles, high-flow conditions, and pressure fluctuations up to 0.6 MPa, making it ideally suited for the harshest industrial and environmental settings where other sensors may fail.

Designed for longevity and minimal intervention, this robust construction significantly reduces maintenance requirements. The grit mesh design resists fouling from suspended solids, leading to fewer cleaning cycles, extended calibration intervals (over 60 days), and substantial cost savings from reduced labor and consumables.

Ideal for Continuous Monitoring in Critical Applications:

• Urban Sewage Treatment: Optimize aeration in activated sludge processes for efficient biological nutrient removal and energy conservation.
• Industrial Wastewater Management: Ensure regulatory compliance, control biological treatment processes, and prevent anoxic conditions.
• Aquaculture: Maintain optimal oxygen levels crucial for fish health, growth, and survival, maximizing yield and preventing disease.
• Environmental Monitoring: Accurately assess water quality in natural bodies (rivers, lakes, oceans) for ecosystem health, pollution detection, and regulatory oversight.

With a wide measuring range and high precision, this sensor delivers dependable, real-time data for critical decision-making.

Key Technical Specifications:

• Principle: Current type sensor (Polarographic electrode)
• Membrane Type: Grit mesh metal membrane (Ultra resistant to pressure, imported)
• Pressure Resistance: 0.6 MPa (Wallop resistant)
• Mounting Thread: M32 * 2.0
• Measuring Range: 0 - 20 mg/L
• Measurement Limit: 40 mg/L
• Detection Limit: 0.01 mg/L (at 20 ℃)
• Breathable Membrane Thickness: 100μm
• Electrode Shell Material: PVC or 316L stainless steel
• Temperature Compensation: Pt100, Pt1000, 22K, 2.252K, etc. (Resistance type)
• Sensor Life: > 2 years
• Cable Length: 5m (standard)
• Response Time: 2 minutes (for 90% at 20 ℃)
• Polarization Time: 60 minutes
• Minimum Flow Rate: 2.5 cm/s
• Drift: < 2% / month
• Measurement Error: < ± 0.01 mg/L
• Output Current: 50-80 nA / 0.1 mg/L (Max current: 3.5μA)
• Polarization Voltage: 0.7V
• Zero Oxygen: < 0.01 mg/L
• Calibration Interval: > 60 days
• Measured Water Temperature: 32 - 140º F (0-60℃)