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PRODUCTS & SERVICES is a provider of process control instruments and field devices for Oil & Gas, Industrial Machinery, Pipelines, Custody Transfer, Tank Gauging, Waste Processing, Water Treatment Plants, Burner Management Systems and Incinerators, Conveyor Control, Food & Beverage, Motor, Pump & Compressor Control, Wireless Telemetry, Data Logging, Real-Time Process Data to Web.

We are an online distribution channel of genuine manufactured instruments such as

  • Flow Transmitters, Indicators, Sensors and Switches.
  • Pressure Switches, Indicators and Transmitters.
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  • Mass Flow Meters.
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  • pH/ORP Analyzers.
  • Disolved Oxygen Analyzers.
  • Turbidity Meters.
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EH Oxymax COS51D digital memosens amperometric sensor for the measurment of Oxygen (O2) in water, wastewater and utilities applications. Corrosion and moisture resistant. 0 to 2000 hPa measuring range. Thread NPT 3/4 Head. POM sensor body and membrane cap.

Part# with Options:        COS51D-AS800
Price with Options:        Please Email us your request for quote   


(1) Approval for EH Oxymax COS51D
Membrane Cap
(2) Membrane Cap for EH Oxymax COS51D

  Availability 5 Days  ]


The continuous measurement of the dissolved oxygen concentration is very important in many areas of water management:

  • Sewage treatment plants:Oxygen measurement and regulation in the activated sludge basin for a highly efficient biological cleaning process
  • Water monitoring: Oxygen measurement in rivers, lakes or seas as an indicator of the water quality
  • Water treatment: Oxygen measurement for status monitoring of drinking water for example (oxygen enrichment, corrosion protection etc.)
  • Fish farming: Oxygen measurement and regulation for optimum living and growth conditions
Your benefits
  • Sensor with digital data transmission:
    • Storage of calibration data in sensor
    • Insensitive to electromagnetic interferences thanks to digital communication to the transmitter
  • Maximum measurement accuracy:
    • Longterm-stable measurement thanks to potentiostatic amperometric three-electrode system
    • Long maintenance intervals
    • Intelligent sensor self monitoring
  • Membrane covered sensor, i.e.:
    • high O 2 selectivity
    • Minimum maintenance effort
    • Minimum calibration effort thanks to simple calibration in air
Further benefits offered by Memosens technology
  • Maximum process safety through contactless inductive signal transmission
  • Data safety through digital data transmission
  • Easy handling thanks to storage of sensor-specific data in the sensor
  • Predictive maintenance possible
Measuring principle

The oxygen molecules diffused through the membrane are reduced to hydroxide ions (OH-) at the cathode. Silver is oxidized to silver ions (Ag+) at the anode (this forms a silver halogenide layer).

A current flows due to the electron donation at the cathode and the electron acceptance at the anode. Under constant conditions, this flow is proportional to the oxygen content of the medium.

This current is converted in the transmitter and indicated on the display as an oxygen concentration in mg/l, μg/l, ppm, ppb or Vol%, as a saturation index in % SAT or as an oxygen partial pressure in hPa.

Measuring Principle Sensor Oxygen
Application Aeration tank, river monitoring, water treatment, fish farming.
Characteristic Amperometric 3-electrode sensor to measure dissolved oxygen.
Measurement range 0,01 - 100mg/l
Measuring principle Closed membrane covered amperometric 3-electrode system.
Design digital signal transmission
Storage of the calibration datas in the sensor.
Material Sensor body : POM
Membrane cap : POM
Dimension Diameter : 40mm
(1.56inch)Length : 220mm
Process temperature max. 50C
Process pressure max. 10bar
Connection - Memosens connector- Process : G1" , NPT3/4

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    CM448-AA12A61AABAA-AA EH Liquiline CM448 8 channel digital multiparameter (pH, redox, ISFET, conductivity inductive and conductive, dissolved oxygen, nitrate and turbidity) transmitter. 8 Memosens inputs, up to 8 current and 2 relay outputs. IP67. Polycarbonate Housing...

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EH Oxymax COS22D digital memosens amperometric sensor for the measurement of Oxygen (O2) in hygienic and sterile applications. 0 to 400 hPa (0 to 6 psi) measuring range. Integrated temperature sensor. ATEX, FM and CSA approvals.



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