Process Control Instruments, Field Devices and Industrial Automation
ENDRESS+HAUSER COS61-A0F0 (1)
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EH Oxymax COS61 dissolved and optical sensor for the measurement of Oxygen (O2) in water, wastewater and utilities applications. High performance sensor: Fast and accurate. 0 to 400hPa measuring range. Stainless steel sensor body. G1" thread process connection. NTC temperature sensor included.

Part# with Options:        COS61-A0F0
Price with Options:        Please Email us your request for quote   

Options:    

Cable Length
(1) Cable Length for EH Oxymax COS61
Head
(2) Head for EH Oxymax COS61

  Availability 4 Days  ]

Application

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
  • Optical technology:
    • Minimum maintenance
    • Maximum availability
  • Sensor with digital signal processing:
    • Calibration data saved in sensor
    • High degree of EMC protection thanks to digital communication with the transmitter
  • Extended maintenance intervals and a high degree of long term stability
  • Intelligent self-monitoring guarantees reliable measured values
  • No flow needed - measurement possible in still water
  • COS61D - the Liquiline sensor
    • Plug&Play: Safe communication based on Memosens protocol
    • Optionally with M12 plug for fast connection to the transmitter
  • COS61 - the Liquisys sensor
    • Compatible with tried-and-tested COS31 with COM2x3W: Easy measuring point changeover to optical technology
    • Compatible with COS41 with COM2x3D with conversion kit
Measuring principle
  • Sensor design:
    • Oxygen-sensitive molecules (markers) are integrated in an optically active layer (fluorescence layer).
    • The surface of the fluorescence layer is in contact with the medium.
    • The sensor optics are directed at the underside of the fluorescence layer.
  • There is an equilibrium between the oxygen partial pressure in the medium and that in the fluorescence layer:
    • If the sensor is immersed in the medium, the equilibrium is established very quickly.
  • Measuring process:
    • The sensor optics send green light pulses to the fluorescence layer.
    • The markers "answer" (fluoresce) with red light pulses.
    • The duration and intensity of the response signals is directly dependent on the oxygen contents and the partial pressure.
    • If the medium is free from oxygen, the response signals are long and very intense.
    • Oxygen molecules quench the marker molecules. As a result, the response signals are shorter and less intense.
  • Measurement result:
    • The sensor returns a signal that is in proportion to the oxygen concentration in the medium.
    • The medium temperature and air pressure are already taken into account calculated in the sensor.
    • In addition to the standard values of concentration, saturation index and partial pressure, the sensor also returns a raw measured value in μs. The value corresponds to the decay time of the fluorescence and is approx. 20 μs in air, and approx. 60 μs in media free from oxygen.

Measuring Principle Sensor Oxygen
Application Aeration tank, river monitoring, water treatment, fish farming.
Characteristic Digital, optical (luminescence) dissolved oxygen measurement.
No flow needed - measurement possible in still water.
Measurement range 0mg/l ... 20mg/l
0%SAT ... 200%SAT
0 ... 400hPa
Measuring principle Oxygen-sensitive molecules (marker) are integrated in an optical active layer (fluorescence layer). The fluorescence layer surface is in contact with the medium. The sensor optics are directed at the back of the fluorescence layer. The sensor optics transmit green light pulses to the fluorescence layer. The markers respond (fluoresce) with red light pulses. The duration and intensity of the response signals depend directly on the oxygen contents or partial pressure.
Design - Calibration data saved in sensor.
High degree of EMC protection.
Material Sensor body : stainless steel 1.4571Membrane cap : POM
Dimension Diameter : 40mm
(1.56inch)Length : 220mm
(8.58inch)
Process temperature -5C ... 60C
( 23 - 140F)
Process pressure max. 10bar
(145psi)
temperature sensor NTC temperature sensor, 0 to 50C
(32 - 122F)
Connection Process connection: G1" thread
Cable connection : fixed cable or TOP68 plug-in-head.

  • OXYGEN > TRANSMITTERS
    COM223-DX0005 EH Liquisys COM223 Dissolved Oxygen transmitter for use with COS41 and COS61 sensors. 0/4-20 mA, HART and PROFIBUS interfaces. IP65. CSA Approval. ..

  • OXYGEN > TRANSMITTERS
    COM253-DX0005 EH Liquisys COM253 Dissolved Oxygen field transmitter for use with COS41 and COS61 sensors. 0/4-20 mA, HART and PROFIBUS interfaces. PC/ABS Housing. IP65. CSA Approval. ..

  • OXYGEN ANALIZERS > ASSEMBLY
    COA250-A EH Cleanfit COA250 flow assembly for Dissolved Oxygen sensors. Wall mounting or unsupported installation in pipes. PVC Material. 871 psi max pressure. ..

  • OXYGEN ANALIZERS > ASSEMBLY
    COA451-A1A EH Cleanfit COA451 manually operated retractable assembly for Dissolved Oxygen sensors. Includes stop bolt, O-ring seals and a ball valve. Stainless Steel Holder. ..


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