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TI00079C/07/EN/13.15
71277561
Products Solutions Services
Technical Information
Ceraliquid CPS41D and CPS41
pH electrodes, digital with Memosens technology,
and analog
For process engineering with ceramic diaphragm
and KCl liquid electrolyte, optionally available with
integrated temperature sensor
Application
Media with very low conductivity or a high proportion of organic solvents or alcohol:
• Chemical industry
• Organic chemicals
• Power stations
• Food industry
• Laboratory measurements
With ATEX- and FMapproval for use in hazardous areas
Your benefits
• KCl liquid electrolyte, can therefore be used with very low conductivity values
(≥ 0.1 μS/cm)
• Ceramic diaphragm with specified KCl flow rate
• If counterpressure applied, can be used up to 11 bar (160 psi) abs. pressure
• Poison-resistant thanks to separate reference capillary
• Suitable for CIP / SIP
• pH membrane glass for applications involving steam sterilization
• Four lengths: 120, 225, 360 and 425 mm
• Available with integrated Pt100, Pt1000 temperature sensor for analog sensors or
NTC30K for digital sensors
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 with
the Memobase Plus CYZ71D
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Function and system design
2
3
1
5
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Ceraliquid CPS41D and CPS41
Measuring principle
Measuring system
pH measurement
The pH value is used as a unit of measurement for the acidity or alkalinity of a liquid medium. The
membrane glass of the electrode supplies an electrochemical potential which is dependent upon the
pH value of the medium. This potential is generated by the selective penetration of H+ ions through
the outer layer of the membrane. An electrochemical boundary layer with an electric potential forms
at this point. An integrated Ag/AgCl reference system serves as the required reference electrode.
The transmitter converts the measured voltage into the corresponding pH value using the Nernst
equation.
A complete measuring system consists of the following components at least:
• pH electrode CPS41D or CPS41
• Transmitter, e.g. Liquiline CM42, CM44x/R, Mycom153, Liquisys M CPM2x3
• Memosens data cable CYK10 or CYK20 for Memosens sensors or CPK9 for analog sensors
• Immersion, flow or retractable assembly, e.g. Unifit CPA442
• Electrolyte vessel CPY7
1 Example of a measuring system for pH measurement
1 Electrolyte vessel CPY7
2 Liquiline M CM42 two-wire transmitter for hazardous area
3 Memosens data cable CYK10
4 pH electrode CPS41D
5 Process assembly Unifit CPA442
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A0027761
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Ceraliquid CPS41D and CPS41
Communication and data processing CPS41D
Communication with the transmitter
Always connect digital sensors with Memosens technology to a transmitter with Memosens
technology. Data transmission to a transmitter for analog sensors is not possible.
Digital sensors can store measuring system data in the sensor. These include the following:
• Manufacturer data
– Serial number
– Order code
– Date of manufacture
• Calibration data
– Calibration date
– Slope at 25 °C (77 °F)
– Zero point at 25 °C (77 °F)
– Number of calibrations
– Serial number of the transmitter used to perform the last calibration
• Operating data
– Temperature application range
– pH application range
– Date of initial commissioning
– Maximum temperature value
– Hours of operation under extreme conditions
– Number of sterilizations
– Resistance of glass membrane
You can display the above-mentioned data using the Liquiline CM44x, CM42 and Memobase Plus
CYZ71D.
Dependability
Reliability
Integrity Data security thanks to digital data transmission
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
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, e.g.
Memobase Plus CYZ71D. Thus, the current application of the sensors can be made to depend on
their previous history.
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
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Ceraliquid CPS41D and CPS41
Safety
Measured values
Measuring range
Maximum process safety
With inductive transmission of the measured value using a non-contact connection, Memosens
guarantees maximum process safety and offers the following benefits:
• All problems caused by moisture are eliminated:
– Plug-in connection free from corrosion
– Measured values cannot be distorted by moisture.
– Can even be connected under water
• The transmitter is galvanically decoupled from the medium. Issues concerning "symmetrical highimpedance" or "asymmetry" or an impedance converter are a thing of the past.
• EMC safety is guaranteed by screening measures for the digital transmission of measured values.
• Intrinsically safe electronics mean operation in hazardous areas is not a problem.
Input
pH value
Temperature
Electrode version AB and AC (for water / wastewater):
pH: 1 to 12
Temperature: -15 to 80 °C (5 to 176 °F)
Electrode version BB and BC (for process, suitable for sterilization):
pH: 0 to 14
Temperature: 0 to 135 °C (32 to 275 °F)
Please note the process operating conditions.
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Ceraliquid CPS41D and CPS41
15°
15°
A
B
Installation
Installation instructions
Do not install the electrodes upside down. The angle of inclination must be at least 15° from the
horizontal. A smaller inclination angle is not permitted as it could cause an air bubble to form in the
glass sphere and prevent the inner electrolyte from completely wetting the pH diaphragm.
NOTICE
Before screwing in the electrode, make sure the threaded connection of the assembly is clean
and runs smoothly.
Screw in the electrode finger-tight (3 Nm)! (Data apply only if installing with Endress+Hauser
‣
assemblies.)
Make sure to follow the installation instructions in the Operating Instructions of the used
‣
assembly.
A0024316
2 Electrode installation; installation angle at least 15° from the horizontal
A Permitted orientation
B Forbidden orientation
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Environment
Ceraliquid CPS41D and CPS41
Ambient temperature range
Storage temperature
Degree of protection
NOTICE
Risk of damage due to frost
The sensor must not be used at temperatures below –15 °C (5 °F) .
‣
0 to 50 °C (32 to 122 °F)
IP 68: Memosens plug-in head, (10 m (33 ft) water column, 25 °C (77 °F), 45 days, 1 M KCl)
IP 68: TOP68 plug-in head (1 m (3.28 ft) water column, 50 °C (122 °F), 168 h)
IP 67: GSA and SSA plug-in head (with closed connector system)
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Ceraliquid CPS41D and CPS41
1
2
3
B
A
0 20 40 60
80
100
0
4
8
12
16
32
68
104
140
176
212
C
1
2
3
A
B
0
4
8
12
16
200100
600 800 1000
1.5 2.9
5.8
8.7
11.6
14.5
C
400
Process
Process temperature
Process pressure (absolute)
Minimum conductivity
pH range
Version AB, AC: -15 to 80 °C (5 to 176 °F)
Version BB, BC: 0 to 135 °C (32 to 275 °F)
1 to 11 bar (15 to 160 psi) if counterpressure applied via separate KCl vessel
CAUTION
L
Pressurization of sensor due to prolonged use under increased process pressure
Risk of injury from glass breakage
Avoid excessive heating of such sensors if using them under reduced process pressure or under
‣
atmospheric pressure.
When handling such sensors, wear protective goggles and suitable gloves.
‣
AB, BB version
(1 diaphragm)
AC, BC version
(3 diaphragms)
Min. 5 μS/cm (flow reduced to minimum when KCl electrolyte is
discharged)
Min. 0.1 μS/cm (flow assembly made of stainless steel with
grounding; flow is stable and reduced to minimum when KCl
electrolyte is discharged)
Version AB, AC:
1 to 12 pH
Version BB, BC: 0 to 14 pH
NOTICE
Risk of damage to electrode
Never use the electrode outside of the listed specifications!
‣
KCl consumption
A0028481
3 KCl consumption as a function of temperature
A Consumption (ml/day)
B Temperature (°C)
C Temperature (°F)
1 800 mbar (11.6 psi) over pressure
2 400 mbar (5.8 psi) over pressure
3 100 mbar (1.5 psi) over pressure
4 KCl consumption as a function of process
pressure
A Consumption (ml/day)
B Over pressure relative to process (mbar)
C Over pressure relative to process (psi)
1 Fluid temperature 80 °C (176 °F)
2 Fluid temperature 50 ° C (122 °F)
3 Fluid temperature 20 ° C (68 °F)
The specified, approximated KCl consumption is based on electrodes with a single diaphragm.
For electrodes with three diaphragms, KCl consumption is proportionately higher.
A0028482
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Design, dimensions CPS41D
1
2
3
4
5
6
7
12 (0.47)
225 (8.86)
18 (0.71)
60 (2.36)
50 (1.97)
2
1
3
4
5
6
7
12 (0.47)
120 (4.72) / 225 (8.86) /
360 (14.17) / 425 (16.73)
18 (0.71)
Ceraliquid CPS41D and CPS41
Mechanical construction
A0024424
5 CPS41D with Memosens plug-in head
for CPA441
1 Memosens plug-in head
2 KCl refill
3 KCl liquid electrolyte
4 Ag/AgCl reference lead
5 Ceramic diaphragm
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6 Temperature sensor NTC 30K
7 pH glass membrane
6 CPS41D with Memosens plug-in head and Hose
connection
1 Memosens plug-in head
2 Hose connection for KCl refill
3 KCl liquid electrolyte
4 Ag/AgCl reference lead
5 Ceramic diaphragm
6 Temperature sensor NTC 30K
7 pH glass membrane
A0024425
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Ceraliquid CPS41D and CPS41
1
2
3
4
5
6
12 (0.47)
18 (0.71)
120 (4.72) / 225 (8.86) /
360 (14.17) / 425 (16.73)
1
2
3
4
5
6
12 (0.47)
18 (0.71)
120 (4.72) / 225 (8.86)
Design, dimensions CPS41
7 CPS41 with ESS plug-in head
1 ESS electrode plug-in head, Pg 13.5
2 Hose connection for KCl refill
3 KCl liquid electrolyte
4 Ag/AgCl reference lead
5 Ceramic diaphragm
6 pH glass membrane
A0024339
8 CPS41 with SSA plug-in head
1 SSA electrode plug-in head, Pg 13.5
2 Hose connection for KCl refill
3 KCl liquid electrolyte
4 Ag/AgCl reference lead
5 Ceramic diaphragm
6 pH glass membrane
A0024338
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Ceraliquid CPS41D and CPS41
1
2
3
4
5
6
7
12 (0.47)
18 (0.71)
225 (8.86)
17 (0.67)
60 (2.36)
Weight
Materials
Process connection
Temperature sensor
A0024337
9 CPS41 with ESA plug-in head for CPA441,
temperature sensor
1 TOP68 plug-in head, Pg 13.5
2 KCl refill
3 KCl liquid electrolyte
4 Ag/AgCl reference lead
5 Ceramic diaphragm
6 Temperature sensor Pt100 or Pt1000
7 pH glass membrane
0.1 kg (0.2 lbs)
Electrode shaft:
Glass to suit process
pH membrane glasses: Type A, B
Metal lead: Ag/AgCl
Diaphragm: Ceramic, suitable for sterilization
Pg 13.5
CPS41D:
CPS41: Pt100, Pt1000
NTC30K
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Ceraliquid CPS41D and CPS41
Plug-in heads
Reference system
Ex approval for CPS41D
CPS41D-****A*: Memosens plug-in head for digital, non-contact data transmission, pressure
resistance 16 bar (232 psi) rel.
CPS41D-****B*: Memosens plug-in head with KCl hose connection for digital, non-contact data
transmission, pressure resistance 16 bar (232 psi) rel.
CPS41
ESA: Threaded plug-in head Pg 13.5, TOP68 for electrodes with and without
temperature sensor, pressure resistance 16 bar (232 psi) rel.
ESS: Hose connection head Pg 13.5, TOP68 for electrodes with and without
temperature sensor, pressure resistance 16 bar (232 psi) rel., Ex
GSA: Threaded plug-in head Pg 13, for electrodes without temperature sensor
SSA: Hose connection head Pg 13.5 for electrodes without temperature sensor
Ag/AgCl reference lead, bridge electrolyte: liquid KCl, 3M, AgCl-free
Certificates and approvals
ATEX
II 1G Ex ia IIC T3/T4/T6 Ga
IECEx
Ex ia IIC T3/T4/T6 Ga
FM
IS Class I Div. 2, in conjunction with the Liquiline M CM42 and Mycom S CPM153 transmitters
CSA
IS Class I Div. 2, in conjunction with the Liquiline M CM42 and Mycom S CPM153 transmitters
Hazardous area versions of digital sensors with Memosens technology are indicated by a redorange ring on the plug-in head.
Ex approval CPS41 (ESA, ESS)
TÜV certificate for Memosens plug-in head
TÜV certificate for TOP68 plug-in head
Electromagnetic compatibility CPS41D
ATEX
II 1G Ex ia IIC T3/T4/T6 Ga
CSA
IS Class I Div. 2, in conjunction with the Mycom S CPM153 transmitter
FM
Class I Div. 2, in conjunction with the Mycom S CPM153 transmitter
Pressure resistance 16 bar rel. (232 psi), minimum three times the safety pressure
Pressure resistance 16 bar rel. (232 psi), minimum three times the safety pressure
Interference emission and interference immunity as per EN 61326: 2012
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Ordering information
Ceraliquid CPS41D and CPS41
Product page
Product Configurator
Scope of delivery
www.endress.com/cps41d
www.endress.com/cps41
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 delivery comprises:
• Sensor in the version ordered
• Brief Operating Instructions
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Ceraliquid CPS41D and CPS41
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.
Assemblies
Cleanfit CPA871
• Flexible process retractable assembly for water, wastewater and the chemical industry
• For applications with standard 12mm sensors
• Product Configurator on the product page: www.endress.com/cpa871
Technical Information TI01191C
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
Cleanfit CPA472D
• Robust retractable assembly for pH, ORP and other industrial sensors
• Heavy-duty version made of durable materials
• For manual or pneumatic, remote-controlled operation
• Product Configurator on the product page: www.endress.com/cpa472d
Technical Information TI00403C
Cleanfit CPA473
• Stainless steel process retractable assembly with ball valve shutoff for particularly reliable
separation of the medium from the environment
• Product Configurator on the product page: www.endress.com/cpa473
Technical Information TI00344C
Cleanfit CPA474
• Plastic process retractable assembly with ball valve shutoff for particularly reliable separation of
the medium from the environment
• Product Configurator on the product page: www.endress.com/cpa474
Technical Information TI00345C
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
Dipfit CPA111
• Immersion and installation assembly made of plastic for open and closed vessels
• Product Configurator on the product page: www.endress.com/cpa111
Technical Information TI00112C
Dipfit CPA140
• pH/ORP immersion assembly with flange connection for very demanding processes
• Product Configurator on the product page: www.endress.com/cpa140
Technical Information TI00178C
Flowfit CPA240
• pH/ORP flow assembly for processes with stringent requirements
• Product Configurator on the product page: www.endress.com/cpa240
Technical Information TI00179C
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Ceraliquid CPS41D and CPS41
Flowfit CPA250
• Flow assembly for pH/ORP measurement
• Product Configurator on the product page: www.endress.com/cpa250
Technical Information TI00041C
Ecofit CPA640
• Set comprising adapter for 120 mm pH/ORP electrodes and sensor cable with TOP68 coupling
• Product Configurator on the product page: www.endress.com/cpa640
Technical Information TI00246C
Electrolyte vessel
Electrolyte solutions
Buffer solutions
Measuring cable
Electrolyte vessel CPY7
• Storage container for KCl electrolyte, 150 ml
• Order as per product structure, see Operating Instructions (BA00128C/07/EN)
KCl electrolyte solutions for topping up liquid-filled pH/ORP electrodes
• 3.0 mol, T = -10 to 100 °C (14 to 212 °F), 1000 ml (33.81 fl.oz), order no. CPY4-2
• 1.5 mol, T = -30 to 130 °C (-22 to 266 °F), 1000 ml (33.81 fl.oz), order no. CPY4-4
• 3.0 mol, T = -10 to 100 °C (14 to 212 °F), 250 ml (8.45 fl.oz), order no. CPY4-5
• 1.5 mol, T = -30 to 130 °C (-22 to 266 °F), 250 ml (8.45 fl.oz), order no. CPY4-6
High-quality buffer solutions from Endress+Hauser - CPY20
The secondary buffer solutions have been referenced to primary reference material of the PTB
(German Federal Physico-technical Institute) or to standard reference material of NIST (National
Institute of Standards and Technology) according to DIN 19266 by a laboratory accredited by the
DAkkS (German accreditation body) according to DIN 17025.
Product Configurator on the product page: www.endress.com/cpy20
CYK10 Memosens data cable
• For digital sensors with Memosens technology
• Product Configurator on the product page: www.endress.com/cyk10
Technical Information TI00118C
Memosens laboratory cable CYK20
• For digital sensors with Memosens technology
• Product Configurator on the product page: www.endress.com/cyk20
CPK1
For pH/ORP electrodes with GSA plug-in head
Ordering information is available from your sales office or at www.endress.com.
CPK9
• Terminated measuring cable for connecting analog sensors with TOP68 plug-in head
• Selection in accordance with product structure
For more information and to order, please contact your sales office.
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