Memosens COS22E

Summary

Product identification

• Product Name: Memosens COS22E
• Type: Hygienic amperometric oxygen sensor with Memosens 2.0 technology.
• Applications: Pharmaceutics and biotechnology, process control in enzyme production, culture processing, water treatment, boiler feedwater, WFI (water for injection), residual oxygen measurement, hazardous areas (ATEX, IECEx, NEPSI, Japan Ex, UK Ex, INMETRO, CSA C/US).
• Versions: Standard sensor (COS22E-22***), Trace sensor (COS22E-12***).

Measuring principle

Amperometric oxygen measurement where oxygen diffuses through a membrane and is reduced at the working electrode, generating a current proportional to oxygen content. This current is converted by a transmitter.

Measuring system

A complete system includes:

• Memosens COS22E oxygen sensor
• Transmitter (e.g., Liquiline CM44x, Liquiline CM42, Liquiline Mobile CML18)
• Measuring cable (e.g., CYK10, CYK20)
• Optional assembly (e.g., Unifit CPA842, Flowfit CYA21, Cleanfit CPA875)

Input

• Measured Variables: Dissolved oxygen [mg/l, µg/l, ppm, ppb, %SAT, %Vol, ppmVol, raw value nA, hPa], Temperature [°C, °F]

Operating limits

• Measuring Ranges (at 20 °C and 1013 hPa):
  • Standard sensor (COS22E-22*):
    • Oxygen: 0 to 60 mg/l, 0 to 600 % SAT, 0 to 1200 hPa, 0 to 100 Vol%
    • Optimum range: 0 to 20 mg/l, 0 to 200 % SAT, 0 to 400 hPa, 0 to 40 Vol%
  • Trace sensor (COS22E-12*):
    • Oxygen: 0 to 10 mg/l, 0 to 120 % SAT, 0 to 250 hPa, 0 to 25 Vol%
    • Optimum range: 0 to 2 mg/l, 0 to 20 % SAT, 0 to 40 hPa, 0 to 4 Vol%
• Process Temperature Range:
  • T4: -5 to 100 °C
  • T6: -5 to 70 °C
• Process Pressure Range: Ambient pressure ... 12 bar (absolute)
• Minimum Flow:
  • Standard sensor: 0.02 m/s
  • Trace sensor: 0.1 m/s
• Sterilization/Autoclavability: Max. 140 °C for 30 min.
• Chemical Resistance: Diluted acids and alkalis, hot water, superheated steam up to 140 °C. CO₂ up to 100% (trace sensor only). Not recommended for hydrogen sulfide or ammonia.

Electrical

• Connection: Memosens technology with inductive, non-contact data transmission. Uses measuring cable CYK10.

Mechanical / hydraulic

• Materials:
  • Sensor shaft: Stainless steel 1.4435 (AISI 316L)
  • Process seal: FKM (USP Class VI and FDA compliant)
  • Membrane top layer: Silicone (USP Class VI and FDA compliant)
• Dimensions: Sensor length options of 120 / 160 / 220 / 320 / 420 mm.
• Weight: 0.2 kg to 0.7 kg depending on length.
• Process Connection: Pg 13.5, torque max. 3 Nm.
• Surface Roughness: Ra < 0.38 µm.
• Degree of Protection: IP68, IP69.
• Mounting: Requires installation in a suitable assembly. Recommended installation angle is 10° to 170° (45° preferred). Avoid upward installation in ascending pipes or where air pockets may form.

Environment

• Ambient Temperature Range:
  • T4: -25 °C to 70 °C
  • T6: -25 °C to 70 °C
• Storage Temperature Range: -25 to 50 °C. Store with watering cap filled with tap water.
• Relative Humidity: 0 to 100%.

Performance characteristics

• Response Time (t90): < 30 s (from air to nitrogen at reference conditions)
• Signal Current in Air:
  • Standard sensor: 40 to 100 nA
  • Trace sensor: 210 to 451 nA
• Zero Current:
  • Standard sensor: < 0.1 % of signal current in air
  • Trace sensor: < 0.03 % of signal current in air
• Maximum Measured Error:
  • Standard sensor: ±1 % of measured value or 10 ppb (higher value applies)
  • Trace sensor: ±1 % of measured value or 1 ppb (higher value applies)
• Limit of Detection (LOD):
  • Standard sensor: 5 ppb
  • Trace sensor: 1 ppb
• Limit of Quantification (LOQ):
  • Standard sensor: 15 ppb
  • Trace sensor: 3 ppb
• Repeatability:
  • Standard sensor: 5 ppb
  • Trace sensor: 1 ppb
• Long-term drift: < 4 % per month (reference conditions), ≤ 1 % per month (reduced oxygen < 4 Vol%).
• Polarization Time:
  • Standard sensor: < 30 min (98% signal), 2 h (100%)
  • Trace sensor: < 3 h (98% signal), 12 h (100%)
• Intrinsic Oxygen Consumption:
  • Standard sensor: approx. 20 ng/h (in air at 20 °C)
  • Trace sensor: approx. 100 ng/h (in air at 20 °C)
• Electrolyte Operating Time:
  • Standard sensor: > 1.5 years
  • Trace sensor: > 3 months

Certificates and approvals

Current certificates and approvals are available via the Product Configurator on www.endress.com. Materials comply with FDA and/or USP class VI specifications. Available with certificate of conformity for pharmaceutical requirements and inspection certificate EN 10204-3.1.

Scope of delivery

Includes ordered sensor version with protection cap, electrolyte, tool, optional certificates, safety instructions (for Ex versions), and brief operating instructions.

Accessories

Key accessories include:

• Assemblies: Cleanfit CPA875, Cleanfit CPA871, Unifit CPA842, Flowfit CPA240, Flowfit CYA21.
• Measuring Cables: Memosens data cable CYK10, Memosens laboratory cable CYK20, Memosens data cable CYK11.
• Zero-point gel: COY8.
• Transmitters: Liquiline CM44, Liquiline CM42, Liquiline Mobile CML18, Liquiline Compact CM82, Liquiline Compact CM72.
• Converter: Memosens analog converter CYM17.
• Software: Memobase Plus CYZ71D.
• Maintenance kit: COS22Z.

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Disclaimer: This extraction may miss figures, footnotes, or revisions. Contractual data must match the OEM PDF revision used on the project.

Official datasheet (PDF)

Lenntech datasheet mirror