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TI00446C/07/EN/04.15
71306865
Products Solutions Services
Technical Information
Oxymax COS22D/COS22
Digital or analog sensor for the measurement of
oxygen
Sensor with long-term stability for frequent
sterilizations and autoclavability
Application
• Pharmaceutics and biotechnology
– Process control in enzyme production
– Control of culture processing
• Beverage industry
• Chemical industry
• Water treatment
– Boiler feedwater
– WFI (water for injection)
• Inertization
• Residual oxygen measurement in processes
Your benefits
• Sensor version suitable for pharmaceutical industry:
– Stainless steel 1.4435 (AISI 316L)
– Sterilizable and autoclavable
• Application-specific versions:
– Sensor for standard applications, e.g. for fermenter control
– Trace sensor, e.g. for use in the power station sector and for the beverage
industry (CO2-compatible sensor)
• Very versatile:
– Standard process connection Pg 13.5
– Installation possible in standard pH assemblies
• Short response time: t98 < 60 s
• Integrated temperature sensor
Other advantages of Memosens technology
• Maximum process safety thanks to non-contact, inductive signal transmission
• Data security thanks to digital data transmission
• Very easy to use as sensor data saved in the sensor
• Recording of sensor load data in the sensor enables predictive maintenance
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Function and system design
1
2
3
4
Oxymax COS22D/COS22
Measuring principle
Application in gaseous media
Measuring system
The oxygen molecules that diffuse through the membrane are reduced at the cathode to hydroxide
ions (OH-). At the anode, silver is oxidized to silver ions (Ag+) (this forms a silver halide 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.
The trace sensor version can be used in gaseous media, such as for inertizations and quality control
in the trace range. Process monitoring in gaseous media can be performed with the standard sensor.
The measured value is displayed in Vol% or as oxygen partial pressure in hPa. Sensors that are used
in dry media consume more electrolyte and must therefore be maintained more frequently.
A complete measuring system comprises:
• An Oxymax COS22 or Oxymax COS22D oxygen sensor
• A transmitter, see table
• An appropriate measuring cable, see table
• Optional: an assembly, e.g. permanent installation assembly CPA442, flow assembly CPA240, or
retractable assembly CPA875
Transmitter COS22D- standard, trace COS22- standard COS22- trace
Liquiline CM44x
Liquiline CM42
Liquisys COM2x3 -
Third-party provider Memosens partner Possible, cable: COK21 Possible, cable: COK21
, cable: CYK10
, cable: CYK10
- -
- -
, cable: COK21
-
1 Example of a measuring system with COS22D-*1
1 Liquiline CM42
2 Measuring cable CYK10
3 Digital oxygen sensor Oxymax COS22D-*1
4 Permanent installation assembly CPA442
2 Endress+Hauser
A0022853
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Oxymax COS22D/COS22
1 2
3
4
MEMO SENS
2 Example of a measuring system with COS22-*1
1 Retractable assembly CPA875
2 Transmitter Liquisys COM253
3 Measuring cable COK21
4 Oxygen sensor COS22
Dependability
Reliability
Memosens
Memosens makes your measuring point safer and more reliable:
• Non-contact, digital signal transmission enables optimum galvanic isolation
• Completely watertight
– Can even be connected under water
– No contact corrosion
– Measured value not affected by moisture. Correct transmission of even the smallest values, e.g.
from amperometric sensors.
• Sensor can be calibrated in a lab, thus increasing the availability of the measuring point in the
process
• Intrinsically safe electronics mean operation in hazardous areas is not a problem.
• Predictive maintenance thanks to recording of sensor data, e.g.:
– Total hours of operation
– Hours of operation with very high or very low measured values
– Hours of operation at high temperatures
– Number of steam sterilizations
– Sensor condition
A0024029
Maintainability
Easy handling
Sensors with Memosens technology have an integrated electronics unit that stores calibration data
and other information (e.g. total operating hours and operating hours under extreme measuring
conditions). Once the sensor has been connected, the sensor data are transferred automatically to
the transmitter and used to calculate the current measured value. As the calibration data are stored
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Oxymax COS22D/COS22
GN/YE
YE
GN
BN
WH
GND
+
–
Com A
Com B
GY
in the sensor, the sensor can be calibrated and adjusted independently of the measuring point. The
result:
• Easy calibration in the measuring lab under optimum external conditions increases the quality of
the calibration.
• Pre-calibrated sensors can be replaced quickly and easily, resulting in a dramatic increase in the
availability of the measuring point .
• Maintenance intervals can be defined based on all stored sensor load and calibration data and
predictive maintenance is possible.
• The sensor history can be documented on external data carriers and in evaluation programs. Thus,
the current application of the sensors can be made to depend on their previous history.
Safety
Measured values
Measuring ranges
Data security thanks to digital data transmission
Memosens technology digitizes the measured values in the sensor and transmits the data to the
transmitter using a non-contact connection that is free from potential interference. The result:
• Automatic error message if sensor fails or connection between sensor and transmitter is
interrupted
• Immediate error detection increases measuring point availability
Input
Dissolved oxygen [mg/l, µg/l, ppm, ppb or % SAT or hPa]
Temperature [˚C, ˚F]
Measuring ranges apply for 20 ˚ (68 ˚F) and 1013 hPa (15 psi)
Measuring range Optimum operational range
COS22/22D-*1 0.01 to 60 mg/l
0 to 600 % SAT
0 to 1200 hPa (0 to 6 psi)
0 to 100 Vol%
COS22/22D-*3
COS22D-*4
0.001 to 10 mg/l
0 to 120 % SAT
0 to 250 hPa (0 to 6 psi)
0 to 25 Vol%
0.01 to 20 mg/l
0 to 200 % SAT
0 to 400 hPa (0 to 6 psi)
0 to 40 Vol%
0.001 to 2 mg/l
0 to 20 % SAT
0 to 40 hPa (0 to 6 psi)
0 to 4 Vol%
1)
1) Applications in this range guarantee a long service life and minimum maintenance
Power supply
Electrical connection COS22D
The electrical connection of the sensor to the transmitter is performed using the measuring cable
CYK10.
3 Measuring cable CYK10
4 Endress+Hauser
A0024019
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Oxymax COS22D/COS22
PK
GN / YE
BN
YE
BU
S
12
90
91
11
Assignment Terminal
External shield
Cathode
Anode
NTC temp. sensor
Active internal shield
(NTC temp. sensor)
COS22
A multi-core COK21 measuring cable is used for the electrical connection of the sensor to the
transmitter.
A0005583-EN
4 Measuring cable COK21
The polarization voltage must be set at the transmitter as follows:
Standard measuring range: -650mV
Trace measuring range: -550mV
The voltage is applied between the working electrode (cathode) and the reference electrode (anode).
Response time
Reference operating conditions
Signal current in air
Zero current
Measured value resolution
Maximum measured error
Performance characteristics
From air to nitrogen at reference operating conditions:
• t90 : < 30 s
• t98 : < 60 s
Reference temperature:
Reference pressure: 1013 hPa (15 psi)
Reference application: Air-saturated water
COS22/22D-*1 (standard sensor):
COS22/22D-*3, COS22D-*4 (trace sensor): 210 to 451 nA
COS22/22D-*1 (standard sensor):
COS22/22D-*3, COS22D-*4 (trace sensor): < 0.03 % of the signal current in air
COS22/22D-*1 (standard sensor):
COS22/22D-*3, COS22D-*4 (trace sensor): 1 ppb in aqueous, 0.02 hPa or 0.002 Vol% in
Corresponds to the recommended measured value resolution at the transmitter
COS22/22D-*1 (standard sensor):
COS22/22D-*3, COS22D-*4 (trace sensor): ≤ ±1 % of measuring range + 1 ppb
*
at reference operating conditions
25 ˚C (77 ˚F)
40 to 100 nA
< 0.1 % of the signal current in air
10 ppb in aqueous, 0.2 hPa or 0.02 Vol% in
gaseous media
gaseous media
≤ ±1 % of measuring range + 10 ppb
*
*
Long-term drift
Influence of the medium pressure
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< 4 % per month in reference operating conditions
≤ 1 % per month in operation with reduced oxygen concentration (< 4 Vol% O2)
Pressure compensation not required
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Oxymax COS22D/COS22
80
176
-5230
32
A B
90
194
C
T
[°C]
T
[°F]
10° 10°
Not permissible!
Not permissible!
Permissible angle of installation
Polarization time
Intrinsic oxygen consumption
Operating time of the electrolyte
Temperature compensation
COS22/22D-*1 (standard sensor): < 30 min for 98% signal value, 2 h for 100%
COS22/22D-*3, COS22D-*4 (trace sensor): < 3 h for 98% signal value, 12 h for 100%
COS22/22D-*1 (standard sensor): Approx. 20 ng/h in air at 25 ˚C (77 ˚F)
COS22/22D-*3, COS22D-*4 (trace sensor): Approx. 100 ng/h in air at 25 ˚C (77 ˚F
Theoretical operating time at pO2 = 210 mbar and T=25 ˚C (77 ˚F)
COS22/22D-*1 (standard sensor): > 1.5 years
COS22/22D-*3, COS22D-*4 (trace sensor): > 3 months
COS22D
Compensation of the membrane properties takes place in the transmitter between -5 and 90˚C (23
to 194 ˚F); above 90˚C (194 ˚F), extrapolation takes place
• Measured variable as partial pressure [hPa] or in Vol%: -5 to 90 ˚C (23 to 194 ˚F)
• Measured variable as concentration [mg/l]: 0 to 80 ˚C (32 to 176 ˚F)
• Measured variable as saturation [%SAT]: -5 to 90 ˚C (23 to 194 ˚F)
Installation instructions
Installation angle
A0011887
COS22
Compensation of the membrane properties depending on the transmitter, recommended:
2.4 % per K
Installation
Installation in suitable assembly is required (depending on the application)
NOTICE
If the unit is installed without an assembly, there is the danger of rupturing cables or losing the
sensor
Do not install the sensor suspended from the cable!
‣
5 Permitted orientations
6 Endress+Hauser
A0005584-EN
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Oxymax COS22D/COS22
p
T
[bar]
[°C]
6
12
135
80
[psi]
174
87
T
[°F]
176
275
-5230
32
The sensor must be installed at an angle of inclination of 10 to 170 ° in an assembly, bracket or
appropriate process connection. Recommended angle: 45°, to prevent the formation of air bubbles.
Inclination angles other than those mentioned are not permitted. Do not install the sensor overhead.
Observe the instructions for installing sensors in the Operating Instructions for the assembly
used.
Environment
Ambient temperature range
Storage temperature
Degree of protection
Humidity
Process temperature
Process pressure
Temperature-pressure ratings
COS22/22D-*1 /3:
-5 to +135 °C (23 to 275 °F), non-freezing
COS22D-*4: -5 to +50 °C (23 to 120 °F), non-freezing
–5 to +50 ˚C (20 to 120 ˚F) at 95% relative humidity, non-condensing
NOTICE
Danger of sensor drying out
Store the sensor with the watering cap only (filled with tap water).
‣
IP 68 (10 m (33 ft) head of water at 25 ˚C (77 ˚F) over 45 days, 1 mol/l KCl)
0 to 100%, COS22D: condensating, COS22: not condensating in area of T-82 connection
Process
COS22/22D-*1 /3:
COS22D-*4: -5 to +80 °C (23 to 180 °F), non-freezing
Ambient pressure ... 12 bar (... 174 psi) absolute
-5 to +135 °C (23 to 275 °F), non-freezing
Minimum flow
COS22/22D-*1 (standard sensor):
0.02 m/s (0.07 ft/s)
COS22/22D-*3, COS22D-*4 (trace sensor): 0.1 m/s (0.33 ft/s)
Chemical resistance
Parts in contact with the medium are chemically resistant to:
• Diluted acids and alkalis
• Hot water and superheated steam up to max. 135 ˚C (275 ˚F)
• CO2 up to 100 %, only with trace sensor COS22/22D-*3
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A0028771-EN
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Oxymax COS22D/COS22
1 2
3
4
5
78
9
6
1 2
3
4
5
78
9
6
Pg 13,5
50 (1.97)
120 / 225 / 360 / 420 (4.72 / 8.86 / 14.2 / 16.5)*
12 - 0.1
(0.47)
NOTICE
Hydrogen sulfide and ammonia shorten the operating life of the sensor.
Do not use the sensor in applications where it is exposed to hydrogen sulfide or ammonia vapors.
‣
Cross-sensitivity
CIP compatibility
SIP compatibility
Autoclavability
Design
COS22/22D-*1/3
Molecular hydrogen causes false low readings and can, in a worst-case scenario, result in total
failure of the sensor.
No cross interference from hydrogen with the COS22D-*4 version.
Yes (COS22/22D-*1/3)
Yes, max. 140 °C (284 °F) (COS22/22D-*1/3)
Yes, max. 140 °C (284 °F), max. 30 min. (COS22/22D-*1/3)
Mechanical construction
Dimensions
6 COS22D
7 COS22
1
Plug-in head
2
Thrust collar
3
Sensor shaft
4
O-ring 8.5 x 1.5 mm
5
Membrane body
6
Shaft sleeve
7
Glass portion with anode and cathode
8
Process seal 10.77 x 2.62 mm
9
Process connection Pg 13.5
A0011869
A0011868
8 Dimensions in mm (inch)
8 Endress+Hauser
A0011881
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Oxymax COS22D/COS22
Pg 13,5
54 (2.13)
120 / 225 / 360 / 420 (4.72 / 8.86 / 14.2 / 16.5)*
12 - 0.1
(0.47)
28 (1.10)
Ø6 (0.24)
39 (1.54)
160 (6.30)
30
(1.18)
Ø6 (0.24)
Ø 29 x 1.5 (1.14 x 0.06)
Flow assembly for sensors with Ø 12 mm (accessories)
A0011886
9 Dimensions in mm (inch)
Weight
Materials
Process connection
Surface roughness
Temperature sensor
10 Dimensions in mm (inch)
Depending on the design (length)
0.2 kg (0.44 lbs) to 0.7 kg (1.54 lbs)
Parts in contact with medium
Sensor shaft (depending on the version) Stainless steel 1.4435 (AISI 316L)
Electrode combination COS22/22D-*1/3: silver / platinum
Process seal VITON (FDA-compliant)
Process seal for ATEX/FM/CSA/NEPSI/TIIS VITON (not FDA-compliant)
Seals/O-rings
Membrane body, sealing ring for shaft sleeve
Membrane Silicone (FDA-compliant, in compliance with
Pg 13.5
Ra < 0.38 µm
NTC 22 kΩ
A0015019
Titanium
Alloy C22
COS22D-*4: silver / gold
VITON (FDA-compliant)
Perfluoroelastomer with USP88 Class VI
USP87/88 class VI), PTFE, steel mesh
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Oxymax COS22D/COS22
Electrolyte
COS22/22D-*1 (standard sensor): Slightly alkaline electrolyte
COS22/22D-*3 (trace sensor): Neutral electrolyte
COS22D-*4 (trace sensor, gold): Slightly alkaline electrolyte
Certificates and approvals
mark
Ex approvals
Material certificates Manufacturer declaration of FDA compatibility
Declaration of Conformity
The product meets the requirements of the harmonized European standards. As such, it complies
with the legal specifications of the EC directives. The manufacturer confirms successful testing of the
product by affixing to it the mark.
Version COS22D-BA
ATEX II 1G / IECEx Ex ia IIC T3/T4/T6 Ga
FM/CSA IS/NI Cl.1 Div.1 GP: A-D
Version COS22D-NA
NEPSI Ex ia IIC T3/T4/T6 Ga
Version COS22D-TA
TIIS Ex ib IIC T4
The manufacturer declares the use of FDA-listed materials.
Ask your Sales Center for the certificates.
Product FDA certificate for
COS22/22D-****22 Membrane, O-rings, process seal
COS22Z-*2*2 Membrane, O-rings, process seal
COS22/22D-****23 Membrane, O-rings
COS22Z-*2*3 Membrane, O-rings
Hazardous area versions
For operation in FDA processes, another FDA-approved seal must be installed before the
process seal (e.g. CPA442). Doing so will sufficiently separate the process from the Ex
connection.
Material test certificate
A test certificate 3.1 in accordance with EN10204 is supplied depending on the version (→ Product
Configurator on the product page).
EHEDG
Compliance with EHEDG's criteria for hygienic design
• TÜV Rheinland, Apeldorn, Netherlands
• Certificate type: Type EL Class I
Ordering information
Product page
10 Endress+Hauser
www.endress.com/cos22
www.endress.com/cos22d
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Oxymax COS22D/COS22
Product Configurator
Scope of delivery
Assemblies (selection)
The navigation area is located on the right of the product page.
1. Under "Device support" click "Configure your selected product".
The Configurator opens in a separate window.
2. Select all the options to configure the device in line with your requirements.
In this way, you receive a valid and complete order code for the device.
3. Export the order code as a PDF or Excel file. To do so, click the appropriate button at the top of
the screen.
The scope of delivery comprises:
• Oxygen sensor with watering cap (filled with tap water) for protecting the membrane
• Electrolyte, 1 bottle, 10 ml (0.34 fl.oz.)
• Tool to push out the membrane body
• Brief Operating Instructions
Accessories
The following are the most important accessories available at the time this documentation was
issued. For accessories not listed here, please contact your service or sales office.
Cleanfit CPA875
• Retractable process assembly for sterile and hygienic applications
• For in-line measurement with standard 12 mm sensors for parameters such as pH, ORP and
oxygen
• Product Configurator on the product page: www.endress.com/cpa875
Technical Information TI01168C
Flowfit CPA240
• pH/redox flow assembly for processes with stringent requirements
• Product Configurator on the product page: www.endress.com/cpa240
Technical Information TI00179C
Unifit CPA442
• Installation assembly for food, biotechnology and pharmaceutics
• With EHEDG and 3A certificate
• Product Configurator on the product page: www.endress.com/cpa442
Technical Information TI00306C
Cleanfit CPA450
• Manual retractable assembly for installing 120 mm sensors in tanks and pipes
• Product Configurator on the product page: www.endress.com/cpa450
Technical Information TI00183C
Flow assembly
• For sensors with Ø 12 mm and length 120 mm
• Compact stainless steel assembly with low sampling volume
• Order No. Order No.: 71042404
Measuring cable Cable for COS22D
CYK10 Memosens data cable
• For digital sensors with Memosens technology
• Product Configurator on the product page: www.endress.com/cyk10
Technical Information TI00118C
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Memosens data cable CYK11
• Extension cable for digital sensors with Memosens protocol
• Product Configurator on the product page: www.endress.com/cyk11
Technical Information TI00118C
Cable for COS22
COK21
• Cable length 3 m (9.8 ft)
Order No. 51505870
• Cable length 10 m (33 ft)
Order No. 51505868
Oxymax COS22D/COS22
Zero-point gel
Maintenance kit
COY8
Zero-point gel for oxygen sensors
• Oxygen-depleting gel for test purposes
• Product Configurator on the product page: www.endress.com/coy8
Technical Information TI01244C
COS22Z
• Service Kit, COS22 and COS22D
• Ordering information: www.endress.com/cos22d under "Accessories/spare parts"
www.addresses.endress.com
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