Endress+Hauser CM442R-AAM2CCF06+AA Reliable Dissolved Oxygen Sensor

The Endress+Hauser CM442R-AAM2CCF06+AA is a high-performance, amperometric dissolved oxygen sensor designed for continuous monitoring in demanding water and wastewater treatment applications. Part of the Liquisys M COM42x series, this robust sensor provides accurate and reliable dissolved oxygen (DO) measurements essential for process optimization, regulatory compliance, and energy efficiency in activated sludge basins, aerobic digesters, and biological treatment stages. With its advanced design and long-term stability, it is a trusted solution for municipal and industrial treatment plants worldwide.

Technical Specifications

Model: Endress+Hauser CM442R-AAM2CCF06+AA

Measurement Principle: Amperometric (Clark-type cell)

Measured Variable: Dissolved Oxygen (O₂) concentration

Measurement Ranges:

0–20 mg/L (ppm) dissolved oxygen

0–200% air saturation

Accuracy: Typically ±0.1 mg/L or ±1% of measured value (whichever is larger)

Response Time (T90): < 45 seconds

Operating Temperature Range: 0 to 50 °C (32 to 122 °F)

Pressure Range: 0.5 to 6 bar absolute

Membrane Types: Pre-tensioned, user-replaceable (PTFE or FEP)

Sensor Body Material: AISI 316L stainless steel (AAM2)

Electrolyte: Gel electrolyte (CCF06) – low maintenance, long service life

Cable Connection: Integral cable (AA) with defined length (to be specified upon order)

Output Compatibility: Compatible with Liquisys M COM42x transmitters and other industry-standard analog/digital inputs

Key Features & Advantages

1. Long-Term Stability & Low Maintenance

The sensor utilizes a gel electrolyte system (CCF06) instead of traditional liquid electrolyte. This design dramatically extends service intervals—typically up to 12 months or more—reducing maintenance time, costs, and sensor downtime. The pre-tensioned membrane is easy to replace, simplifying field servicing.

2. Robust Design for Harsh Environments

With an AISI 316L stainless steel sensor body (AAM2), the CM442R is built to withstand the corrosive and abrasive conditions commonly found in wastewater treatment plants, including activated sludge basins. Its rugged construction ensures reliable operation and long sensor life.

3. Fast & Accurate Measurements

The advanced amperometric cell offers a rapid response time (<45 seconds) to changes in oxygen concentration. This allows for real-time process control, enabling precise aeration control, optimizing blower energy use, and improving treatment efficiency.

4. Easy Integration & Operation

Designed for seamless integration with Endress+Hauser’s Liquisys M COM42x series transmitters, the sensor enables straightforward setup, calibration, and diagnostics. The clear, pre-tensioned membrane system minimizes calibration effort and user error.

5. Cost-Effective Process Optimization

By providing accurate and reliable DO data, this sensor is key to implementing advanced aeration control strategies. This leads to significant reductions in energy consumption (the largest operating cost in wastewater treatment), improved treatment quality, and compliance with environmental discharge permits.

Applications

Wastewater Treatment: Activated sludge aeration control, aerobic digestion, basin profiling.

Industrial Water Treatment: Biological treatment processes.

Aquaculture: Monitoring oxygen levels in fish farms and hatcheries.

River & Lake Water Monitoring: Environmental monitoring and studies.

Immediate Availability

We are pleased to confirm that the Endress+Hauser CM442R-AAM2CCF06+AA dissolved oxygen sensor is currently in stock. Ensure your treatment processes run efficiently and compliantly with this industry-proven measurement solution. Contact us today for pricing, technical specifications, or to place your order.

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