Competence in pH measurement - Access Instrumentationaccessinstrumentation.co.uk/PDFs/pHMeasurement.pdf · 6 7 pH measurement in food/pharmaceuticals Very high demands are made on

Competence in pH measurementSensors, assemblies and transmitters for all applications

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Over 30 years' experience in analysis measuring technology makes the globally present Endress+Hauser Group a strong partner. Endress+Hauser pH measuring systems can be found everywhere where the customer requires reliable measured values, a high degree of availability and long operating times. With the production of 250,000 process electrodes per year, the company has achieved the top position in the world market. The quality of the electrodes and solutions is among the highest customers can actually use. Ongoing expansion of its research and development capacity in the past number

of years has further improved the performance and high quality of the products and the company has been able to offer new technologies to the user. Consequently, not only was the non-glass pH sensor made available to process measurement but the fully automated measuring point with a very good cost/performance ratio was also launched on the market. By mastering all the technically difficult production stages in conjunction with a high degree of automation in almost all production areas, Endress+Hauser has achieved a very good range of manufacture. This results in very high and consistent

product quality for the customer as well as rapid turnaround times and outstanding delivery reliability with regard to all standard products or individual products tailor-made for special applications. Solutions are offered for almost every relevant branch.

Solutions for liquid analysis

With the new Ceragel and Tophit sensors, Endress+Hauser is presenting sensor types whose capabilities can hardly be beaten. The CPS71 sensor is the only sensor on the market with an innovative double chamber and double gel reference system with a classic design, i.e. 120 mm length and 12 mm shaft glass diameter. New gel compositions ensure a high level of protection against contamination and a wide measuring range of 0 to 14 pH. Longer operating times are automatically guaranteed here. Progress could also be made in glass research. The new B glass introduced a membrane glass to meet the present-day and future demands

of the processes. At Endress+Hauser, there are just two membrane glasses to cover all applications. The objective behind the new development was to improve upon the sensor operating times of conventional pH/redox sensors and thus reduce operating costs for the user. By making ISFET technology available in the CPS441/471/491 sensor family for on-line pH measurement, new fields of application have been opened in the areas of biotechnology, the pharmaceutical industry, the food industry and environmental technology. All sensors from Endress+Hauser are approved to ATEX/FM and equipped with TOP 68 or Memosens.

This ensures a safe connection to IP 68 which is TÜV certified up to 16 bar at three-fold safety.

Thus, in all areas of the economy, the dependable pH sensors from Endress+Hauser help to protect man and the environment and guarantee the quality of high-quality products.

Research and development pay

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Modular measuring point conceptThe ambitious implementation of the modular measuring point concept in all assemblies of a pH measuring point allows the customer to instrument from a high-quality low-cost version right up to a complete high-tech application – all from the one shop. If developing a manual measuring point right up to a fully automatic pH solution, the user finds the ideal solution for every requirement. Well planned and thought-out modular concepts give the customer the opportunity of introducing the optimum sensor into the process. There is a great range of assemblies to choose from with so many different process connections for all possible installation positions and various materials from PVC to stainless steel right up to Hastelloy.

With the retractable assemblies, the customer is always integrating a sensor with the standard length of 120 mm into the application. All sensor types fit into the same assemblies. As a result, it is easy to convert to another sensor type even in difficult applications.

The modularity element continues in the transmitter concept. Here too, models range from the new powerful Liquiline in two-wire technology to the pH transmitter "Liquisys" (most sales worldwide) right up to the top-class device "Mycom". Each device line is characterised by its simple and uniform operation. The unique Parawin software tool for the Mycom transmitter allows users to configure the entire pH measurement off line at their own PC.

The configuration is then transferred to the transmitter locally by means of an easy-to-use data block and measurement can start. This makes any adjustment for complex processes absolute child's play. It goes without saying that downloadable software as well as HART and PROFIBUS are available for all transmitter families and offer the highest possible degree of variation for differing applications.

on site. Together with the customer, the applications are observed in detail and the various measuring point modules are recommended. The media in which measurement takes place, the pressure and the temperature are important factors for the correct specification of the pH measurement. All moving parts of the retractable assemblies must be serviced regularly to ensure the high degree of availability of the system. If the customer so desires, maintenance concepts and training programmes are worked out for the operating staff. Endress+Hauser accepts the entire responsibility for the pH measuring point.

Service means more than just maintenancePerfectly functioning measurement requires thorough planning. The right choice of sensor leads to an optimum operating time of the pH sensor. Today, engineers at Endress+Hauser assist the customer from planning the pH measuring point right up to commissioning and maintenance

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pH measurement in the chemical industry

pH measurement is one of the most important online analysis methods in the chemical industry. The monitoring, accuracy and maintenance of the pH value in the production plants is a guarantee for optimised product yields. As a result, the pH value is also especially suited as a measured variable to control and regulate chemical processes. As a limit variable it is

used to trigger alarms, protect material and the environment against damage and to guarantee a high degree of product quality. Large demands are made on electrodes in modern industrial processes. By selecting the right electrode and with the long operating times of Endress+Hauser sensors, the user can easily reduce the operating costs of a plant.

Optimum installation solutions with retractable assembly technology or permanent installations The pH sensors can be optimally integrated into the processes with the aid of Endress+Hauser assembly technology. Almost any process connection can be made. Many special materials are available on request.

Flow assembliesFlowfit CPA240• Bypass measurement• Installation of up to three electrodes • Spray cleaning possible• Cost-effective and high degree of sensor

availability

Dipfit CPA140 immersion assemblies• Installation in open basins and high

containers• Sensor holder with bayonet lock prevents

the cable from twisting during installation

• Use in enamelled or rubberised containers

• Wide range of materials allows diverse use

• Installation of up to three electrodes possibleDipfit CPA140

Cleanfit CPA471

Cleanfit CPA450

Flowfit CPA240

Cleanfit CPA475

Unifit CPA442

Unifit CPA442 installation assemblies• Simple permanent installation• Integrated protection guard protects

against electrode breakage• Low-cost pipe and boiler mounting

Retractable assemblies for highdemands Cleanfit CPA450/471• Highest degree of safety for man and

process thanks to ball valve or patented O-ring sealing concept as process seal

• Simple and easy to operate• High degree of sensor availability • Sensor change and check during the

running process• Integrated rinse chamber allows

contamination-free work and cleans the sensor optimally

• Large choice of special materials and sealing concepts

• Integrated scraper ring possible • All assemblies can be easily converted

from gel-filled to liquid-filled sensors

Assemblies

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Mycom S CPM153 transmitter• Monitoring functions for electrode slope,

zero point, membrane glass impedance and diaphragm resistance

• Newly developed process check system • Logbook functions for calibrations, pH

value, alarms and operating commands• Optimum diagnosis module• Two independent measuring channels for

redundancy and differential measurement• Configuration with software module

Parawin at PC workplace.• Can be easily expanded to fully automatic

measuring point• NAMUR – contacts• Optimised alarm and controller functions• Two freely configurable current outputs

The fully automatic system solutions with Topcal S are described on Page 10.

New sensor technologiesopen up new applicationsAll relevant sensors from Endress+Hauser are approved to ATEX/FM and equipped with TOP 68 or Memosens. This ensures a safe connection to IP 68; the plug-in heads are TÜV certified up to 16 bar.

Orbisint CPS11• Dirt-repellent teflon ring diaphragm• High chemical stability thanks to

advanced gel developments• Reliable measurement results in event of

extreme pH values (pH 0 – 14)• Can be used with high pressures

Ceraliquid CPS41• Rapid response time and highest level of

precision• High degree of protection against

contamination thanks to liquid electrolyte refilling

• Can be used with external reference• Ideal for media with low

conductivity• Electrolyte flow can be increased if there

is a risk of diaphragm blockage

Orbipore CPS91• Open aperture allows use in precipitation

reactions, emulsions and suspensions• Rapid response time and high level of

precision• Standard sensor for chemical element

production• Can be used with high pressures• Use is recommended in pigment

manufacturing and in the production of colourants

Tophit sensors CPS441/CPS491New applications are opened up with the new non-glass ISFET sensors (ion-sensitive fieldeffect transistor). The ISFET sensors in the Tophit line can even be installed overhead. They are characterised by their extremely stable PEEK shaft and can be used in media with high organic solvent parts.• Low-maintenance• Liquid electrolyte refilling

(CPS441)• High sensor stability leads to extended

calibration intervals• Ideal for low medium conductivity• Rapid response time even at low

temperatures (up to -15° C)• Open aperture allows use in precipitation

reactions, emulsions and suspensions (CPS491)

• Suitable for media with a low proportion of water

Sensors

TransmittersLiquiline M CM42 transmitter• Two-wire transmitter with large, high-

contrast display and red alarm LED• Plastic housing with handy keys, IP 67• Flexible module concept, fast

replacement or extension even in hazardous applications

• Menu navigation and configuration via navigator, intuitive operation thanks to plain text messages and online help

• Second current output• Monitoring function for electrode

slope, zero point, sensor check system for impedance of glass membrane and diaphragm

• FOUNDATION FIELBUS, PROFIBUS and HART fieldbus protocols

Mycom S CPM153

Liquiline M CM42

OrbisintCPS11D

CeraliquidCPS41D

Tophit CPS491

Orbipore CPS91D

Tophit CPS441

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pH measurement in food/pharmaceuticals

Very high demands are made on a measuring point in the food and pharmaceutical industries with regard to hygiene and cleanability. Endress+Hauser offers a wide range of special pH sensors for this purpose which are characterised by optimum cleanability, a high number of CIP and SIP cycles and the possibility of autoclaving. In addition, special pH sensors have a certified biocompatibility to ISO standard which guarantees that only biologically safe materials are in direct contact with the medium. As an additional

product safety element, Endress+Hauser is the only supplier to equip its sensors with biologically safe, completely acrylamide-free gel. Various safety measures (to prevent against contamination) are combined in a sensor to achieve especially long electrode operating times in contaminated conditions in particular (for example, in processes with amino acid compounds containing sulphur). The CPS71 and CPS471 sensors are equipped with a bridge electrolyte which makes the way longer for toxic substances. They also have a double chamber reference

which protects the reference system from the electrode poisons. Typical processes such as active agent synthesis, product treatment and fermentation can be monitored more easily since the CPS471 and CPS441 sensors can be installed in an overhead position. In the pharmaceutical and foodstuff industries, major demands are made on the hygiene of the pH measuring points. The EHEDG certified CPA442 assembly meets these demands and thus guarantees the safety and quality of the products.

Cleanfit CPA475and CPA465 retractable assemblies• Automation especially of

hygienic processes possible• In-line steam sterilisability according to

EHEDG test procedure

Unifit CPA442 installation assembly• Permanent installation assembly

with patented moulded seal for glass electrodes and non-glass ISFET sensors

• EHEDG certified online cleanability• Electropolished surface• Available for all important process

connections

Unifit CPA442

Cleanfit CPA475/465

Unifit CPA442 Electrolyte vessel

Cleanfit CPA475/465

Cleanfit CPA475/465

• Leak check of process seal• 3A-approval with materials in conformity

with the FDA• Fully automatic calibration and cleaning

possible with Topcal S CPC300• Thermal decoupling of process

connection from pneumatic drive with Cleanfit CPA465

Assemblies

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Ceraliquid CPS71• CIP/steam-sterilisable/autoclavable glass

sensor for sterile pH measurement

• Certified biocompatibility of allmaterials in contact with medium

• Especially low-maintenance thanks to double chamber reference withintegrated bridge electrolyte

• Reference gel free from acrylamide and polyacrylamide

Tophit CPS471• Non-glass and break-proof

pH sensor (materials in contact with medium FDA listed);

• Wetted ports biocompatible• Horizontal mounting and

overhead installation possible• Sterilisable, autoclavable• cleanability according to EHEDG

test procedure• Especially low-maintenance• Reference gel free from acrylamide and

polyacrylamide

Ceraliquid CPS41with electrolyte vessel CPY7• pH combination electrode with KCl liquid

electrolyte for special applications with high requirements, especially in the case of rapidly changing media

• Sterilisable

Tophit CPS441• Non-glass and break-proof

pH sensor (material in contact with medium FDA listed);

• Material in contact with mediumbiocompatible

• Horizontal mounting and overhead installation possible

• Sterilisable, autoclavable,cleanability according to EHEDGtest procedure

Liquisys M CPM223/253 transmitter• Simple to operate: clear menu structure

with plain language in 6 languages makes configuration easier

• Large two-line display allows simultaneous display of measured value and temperature

• Ultra simple two-point calibration via the CAL key

• Sensor check system for pH glass• Live check of the sensor

Mycom S CPM153 transmitter• The ideal supplement for standard glass

electrodes and ISFET pH sensors with clear text operation

• High safety and certainty of measurement thanks to integrated monitoring functions

• Logbook functions of operation, calibration and error messages

• Documentation of complete measuring point possible with optional off-line Parawin tool

• Can be retrofitted to fully automaticcalibration and cleaning systemTopcal S CPC300

Sensors

Transmitters

Liquiline M CM42 transmitter• Two-wire transmitter with large, high-

contrast display and red alarm LED• Stainless steel housing with membrane

keypad, hygienic design, IP 67• Flexible module concept, fast

replacement or extension even in hazardous applications

• Menu navigation and configuration via navigator, intuitive operation thanks to plain text messages and online help

• Second current output• Monitoring function for electrode

slope, zero point, sensor check system for impedance of glass membrane and diaphragm

• FOUNDATION FIELBUS, PROFIBUS and HART fieldbus protocols

CeraliquidCPS41D

CeragelCPS71D

TophitCPS471

TophitCPS441

Mycom S CPM153

Liquiline M CM42

Liquisys M CPM253

Liquisys M CPM223

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pH measurement in water/wastewater

The treatment of drinking water orwastewater always involves monitoring regulated processes. As a result, the pH value is one of the most important measured variables in all stages of the process as both a value determining the quality of the water and as a controlled variable which has a direct effect on the economic efficiency of the plant.

Dipfit CPA111 immersion assembly • Flexible adjustment of immersion depth

thanks to adjustable flange; additionally with bayonet lock thus easy to install and detach the assembly.

• Simple installation and removal of electrode holder using bayonet securing technology.

• Three electrode installation locations for pH/redox and temperature sensor or cleaning in a standard length of 120 mm.

Cleanfit CPA473 retractable assembly • Automation even for difficult processes• Various immersion depths

(tank/pipe installation)• Sealing water to screen off the rinse

chamber• Optionally with scraper seal• Fully automatic calibration and cleaning

in conjunction with Topcal S CPC 300

Cleanfit CPA450 retractable assembly • Reliable separation of process with

stainless steel ball valve• Use of standard gel electrodes with or

without integrated Pt 100 with length 120 mm

• Variable immersion depth up to 700 mm

• Integrated rinse and calibration connections

Cleanfit CPA473

Cleanfit CPA450

Flowfit CPA250

CYH101

Dipfit CYA611

Dipfit CPA111

Dipfit CYA611 immersion assembly • 3 possible ways of securing unit:

Wall mounting, suspension bracket,pendulum mounting

• Simple sensor mounting via G1 andNPT 3⁄4" thread

Flowfit CPA250 flow assembly• Installation locations for maximum three

sensors Pg 13.5 (pH, redox, temperature, cleaning)

• Easy access to the electrodes in the flow area thanks to screw-off sealing cap; as a result, calibration or cleaning can take place without the need to remove the sensor.

Assemblies

Chemoclean CPR31spray cleaning systemThe spray cleaning unit can be retrofitted any time without the need to convert the assembly.

Chemoclean CPR31

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pH measurement in water/wastewaterLiquisys M CPM223/253 transmitter• Simple to operate: clear menu structure

with plain language in 6 languages makes configuration easier

• Large two-line display allows simultaneous display of measured value and temperature

• Simple two-point calibration by means of Cal key

• Safe to operate: overvoltage protection (high-voltage protector) toEN 61000-4-5

• Directly accessible manual control of contacts

• Calibration plausibility check• Customised alarm configuration for fault-

signalling contact and error current• Automatic start of cleaning following

alarm or limit value overshoot• Sensor check system for pH glass and

reference• Live sensor check• Special neutralisation regulator

Orbisint CPS11We recommend the Orbisint CPS11 sensor with ring-shaped PTFE diaphragm and fixed electrolyte for all standard applications. The CPS12 is the standard redox electrode with the CPS11 reference system.

Orbipac CPF81• pH combination electrodes with

"integrated" assembly as simplest mechanical adaptation in pipelinesor immersion assemblies

• Double chamber reference withKNO3 electrolyte bridge

• Optionally available with flat membrane and integrated potential matching

OrbipacCPF81

Ceraliquid CPS41The Ceraliquid CPS41 sensor with refillable liquid electrolyte is used in applications where there is a high risk of the diaphragm blocking or where a high level of accuracy is required.

Orbipore CPS91The open aperture allows the use of the electrode in media with a high solids content, in suspensions/emulsions as well as in precipitation reactions where the diaphragm would otherwise block in a short time.

Sensors

Transmitters

OrbisintCPS11D

CeraliquidCPS41D

OrbiporeCPS91D

Liquisys M CPM223Liquisys M CPM253

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System solutions for pH measuring technology

Continuous maintenance of the sensor guarantees a high degree of accuracy and the highest degree of availability of a pH measuring point. This comprises both the cleaning and calibration of the sensor as well as the monitoring of the entire measuring point. However, this leads to high operating and maintenance costs. This makes a significant difference

especially in applications with high requirements, such as in the chemical, food and pharmaceutical industry or with measuring points with aggressive process conditions. Endress+Hauser offers automatic pH measuring points to reduce the running costs and maintenance costs to a minimum. Thanks to the various degrees of automation, a suitable automatic

measuring system can be found for each process: from the simple application in the area of wastewater to processes in the chemical industry right up to very demanding applications with regard to accuracy and measuring safety and certainty in the pharmaceutical industry.

Fully automatic measuring, calibration, sterilisation and cleaning with Endress+Hauser.

Topclean STopclean S, the alternative, in which automatic cleaning and manual calibration outside the process suffice. With Topclean S, you have the option of automatically rinsing and cleaning the electrodes outside the process. With an additional valve, sterilisation can also optionally take place. The programming, safety functions and the data handling are the same as for Topcal S.

ChemocleanChemoclean used in conjunction with a Liquisys M or Mycom S as the control unit ensures optimum cleaning of the electrode directly in the process, as is mostly sufficient in the wastewater sector. By selecting a Mycom as the control unit, you also have the extensive options of off-line configuration at the PC as well as the function of documenting the entire measuring point by means of the Parawin tool.

Topcal SThe fully automated Topcal S system for greater demands provides reliable measurement results with a minimum amount of maintenance particularly in aggressive and highly contaminated media as often occur in chemical processes. With Topcal S, you can clean and calibrate fully automatically outside the process. Maintenance work is reduced to changing the electrodes and buffer as well as the cleaning solution.

CYC300 cabinet for Topcal S or Topclean S• Reliable protection of Topcal S or

Topclean S against environmental conditions (dirt, water jets); also suitable for use in the field under extreme weathering conditions thanks to integrated heater

• Stainless steel or plastic version meets requirements of both the food/pharmaceutical sector and the chemical industry

• Maintenance friendly thanks to retractable buffer box, a central unit for all electrical connections, easy access to wear parts

• Operating panel for rapidly starting the calibration and cleaning programmes integrated in Topcal S simply at the press of a button

• Operating panel can be detached and installed separately

• Additional measured value recording thanks to optional measured value recorder (e.g. Memograph S)

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Topcal S CPC300 Topclean S CPC30 Chemoclean

pH transmitters

Mycom S CPM153pH/redox transmitterwith controller and limit functions for Ex andnon-Ex areas

pH assemblies

Retractable assembliesCleanfit Compact pH assembliesin various materials for all process connections

ImmersionassembliesDipfit CPA111Dipfit CPA140

FlowassembliesFlowfit CPA250Flowfit CPA240

Spray cleaningsystemsChemoclean CPR3Chemoclean CPR30Chemoclean CPR31

Zubehör

CPR40rinse blockFor 1 or 2 additional valves(sterilisation)

Low-maintenance and cost-effective measurement with Endress+Hauser.

Liquisys MCPM223/253

Mycom SCPM153

CleanfitCPA473Process retrac-table assembly with ball valve shut-off

CleanfitCPA475Sterilisable retractable assembly for the highest hygienic requirements

Fully automaticpH measuring point with inte-grated control

• Calibration• Sterilisation• Cleaning• Rinsing

Fully automaticpH measuring point with inte-grated control

• Sterilisation• Cleaning• Rinsin

pH measuring point with auto-matic cleaning system

• Cleaning• Rinsing

ToolkitParawinFor off-line configurationof Topcal S/Topclean S at the PC

For Chemoclean inconjunction with Mycom S

CYR10injectorCleaning injector for Chemoclean system with valves for motive water and cleaning agents

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pH sensors with Memosens technology

Memosens makes the pH electrodea digital sensor with integrated data storagepH sensors with Memosens technology save the current calibration data and other information which can be used for look-ahead maintenance, such as hours of operation, maximum and minimum pH values and maximum and minimum temperature.When the sensor is mounted, the calibration data are automatically transferred to the transmitter and usedto calculate the current pH value.

The result:• Measuring point maintenance is no

longer based on individual issues identified but rather all relevant sensor data are used.

• The current application of the sensors can be made to depend on the previous history.

Moisture in the connection can change the measured value and may even result in measurement failure. The Memosens technology revolutionises the safety of data transfer by digitalising the measured value in the sensor and transferring it to the transmitter without a contacting, and thus

Measuring the pH value makes great demands not only on the pH-sensitive glass but also on the transmission of the measured value from the sensor to the transmitter. Low currents and very high sensor internal resistances require a high-impedance connection to the transmitter.

moisture-sensitive, connection. The jump in technology to a new generation of sensors has additional advantages and eliminates general limitations of the technology in place to date.

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pH sensors with Memosens technology are the first pH sensors to allow calibration/adjustment away from the measuring point in the measuring lab.

The result:• The availability of the measuring point is

dramatically increased by the quick and easy replacement of precalibrated sensors.

• Measuring point down-time is reduced to the time between detecting and replacing the sensor.

• The calibration/adjustment itselftakes place under optimum externalconditions in the measuring lab.

An unestablished connection between the sensor and transmitter is actively displayed – the first really definite connectionDigital measured value transmission automatically results in an error message if the signal flow is interrupted. And this regardless of whether the sensor or measuring cable is no longer working properly. The result:• The availability of the measuring point is

dramatically increased and ensured• Automatic sensor detection allows for

unproblematic sensor replacement

EMC safety through galvanic decoupling of medium from transmitterHighly integrated electronics in the sensor convert the analog signal of the pH sensor to digital information which is then transferred via the cable coupling to the transmitter contactlessly and free from interference potential. The result:• No more need to ask about

"symmetrically high-resistance" or "unsymmetrical" or an impedance converter.

The first non-contact measured value transmission from the pH sensor to the transmitterpH sensors with integrated Memosens technology transmit the measured value contactlessly from the plug-in head of the electrode to the cable coupling. The result:• Principally free from corrosion of the

connection• A coupling system that can even be

connected under water• Free from leaks and measured value

distortion from moisture

Inductive signal transmission

Inductive energy transmission

Sensor with Memosens

Measuring point maintenance Measurement

Standard sensorCalibration on site Calibration in the measuring lab

sensor removal

sensor installation

• Calibration /adjustment

• Saving sensor data• QS documentation• Optimum

lab conditions

sensor removal

sensorinstallation

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pH glass electrodes

The method of pH measurement using glass electrodes is a potentiometric measurement method. Since glass is basically an electric insulator, amplifiers for the pH measurement must have an extremely high input impedance. The measuring effect is based on a pH-sensitive glass membranewhose surface reacts to the acid content of the solution with a specific voltage.

This voltage is then measured relative to a reference element. Nowadays, the most modern pH glasses display high selectivity (low cross-sensitivity to ions other than H+) over a wide temperature range. A pH sensor achieves the outstanding performance of the linear measurement of a material component over a concentration range of 14 (!) exponents.

Glass electrodes Recommendedarea ofapplication

Generalapplication

Diaphragm/reference

Version Special characteristics/features

Orbisint CPS11

Standard applications in process and the environment

Long-term monitoring, processes with little change

PTFE diaphragm,Double gel reference

Ex, all shaft lengths with temperature sensor,Memosens,Advanced GelTechnology

Very robust,Heavy-duty version / high pressure,integratedpotential matching,flat membrane,

Ceraliquid CPS41

Specialapplicationswith high requirements with regard toaccuracy,speed

Rapidly changing composition of media,highly clogging media, low conductivities

Ceramic diaphragm,Liquid lead

Ex, all shaft lengths with temperature sensor

Greatest accuracy,Can be subject to pressureto prevent clogging,Gel-free,refillableelectrolyte,3A

Ceragel CPS71

Hygiene and sterile applications

Pharmaceuticals,biotechnology,fermenters,contaminating media,overhead installation

Ceramic diaphragm,Double chamber and double gel reference


Overhead installation,CIP/SIP andautoclavable,with highaccuracy,Free from acrylamide and polyacrylamide, 3A,biocompatible

Orbipore CPS91

Process applications Media with high contamination:emulsions,suspensions,precipitation reactions

Open aperture,Double gel reference


Rapid response,new, stabilised gelinsensitive to contamination

Voltage occurrence withpH measurement with glass electrodes

Internal bufferpH 7

Glass mem

brane

H+

H+

H+

H+

H+

H+H+

H+H+

H+

H+

H+Cl-

Cl-

Cl-

Medium

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Non-glasssensors

Recommendedarea of application

Generalapplication

Diaphragm/reference

Version Special characteristics/features

Tophit CPS441

Special applicationswith high requirements with regard toaccuracy and speed,non-glass break-proof

Low temperatures,Rapidly changing composition of media,highly clogging media, low conductivities

Ceramic diaphragm,Liquid lead

Ex, all shaft lengths with temperature sensor

Overhead installation, rapid response atlow temperatures,lower amount of maintenance required than with glass,3A

Tophit CPS471

Hygiene and sterile applications,non-glass,break-proof

Low temperatures,pharmaceuticals,biotechnology,contaminating media

Ceramic diaphragm,double chamber reference,double gel

Ex, all shaft lengths with temperature sensor,Advanced GelTechnology

Overhead installation,SIP, autoclavable,rapid response, low temperatures, lower amount of maintenance required than with glass,free from acrylamide and polyacrylamide,3A,biocompatible

Tophit CPS491

Process applications, non-glass,break-proof

Low temperatures,emulsions,suspensions,organic solvents

Open aperture,double gel reference

Ex, all shaft lengths with temperature sensor,Advanced GelTechnology

Overhead installation, rapid response atlow temperatures,stabilised gel insensitive to contaminationlower amount of maintenance required than with glass

Apart from using a glass membrane, the pH value can also be measured using an ion-selective field-effect transistor (ISFET). It is, in effect, a simple transistor with a source and drain that are separated from the gate by means of an isolator. As with the glass membrane, hydrogen ions from the medium can accumulate on the gate. The resulting positive charge on the outer side of the gate is "mirrored" on the inner side where a negative charge occurs. This makes the semiconductor channel conductive. The "field effect" results from the extent of the conductivity: the higher the pH value of the liquid, the more H+ ions accumulate on the gate and the more current can measurably flow between the source and drain. In contrast to the glass electrode, there is no ion flow between the fluid and the sensor

here. "Chemistry“ and electrical measure-ment are kept totally separate. As a result, the sensor material does not change and the need for recalibration is by no means as frequent as with glass electrodes. Since there is no source layer, ISFETs are also suitable for pH measurement in media with a low proportion of water. Modern ISFET materials are highly selective and follow the Nernst law in closer tolerance limits than glass. The sensor's extreme robustness comes from embedding the chip in a stable and unbreakable PEEK body.

Non-glass pH sensors

The current between the source and drain of the semiconductor element depends on the charge at the gate and thus directly on the pH value.

Source Drain

Semicon-ductor element

GateH+

H+H+

16 17

Immersion assemblies Flow assemblies Permanent installation assemblies Retractable assemblies

Dipfit Dipfit Dipfit Flowfit Flowfit Unifit Cleanfit Probfit Cleanfit Cleanfit Cleanfit Cleanfit Cleanfit

CYA611 CPA111 CPA140 CPA240 CPA250 CPA442 CPA450 CPA465 CPA471 CPA472 CPA473 CPA474 CPA475Application Water, wastewater Water, wastewater,

processProcess Process Water Process, food,

pharmaceuticalsWater, wastewater, process

Food, process,pharmaceuticals

Water, wastewater, process





Description Simple assembly 3 electrode installation locations, 120 mm electrode,bayonet technology

3 electrode installation locations, 120 mm electrode,bayonet technology

3 electrode installation locations,120 mm electrode


120 mm electrodewith and withoutprotection guard

Manual,120 mm electrode

Manual or pneumatic, can be fully automated with CPC30/300






Area of use Open tank,open channel

Open tank,open channelclosed tank

Closed tank Piping,bypass

Piping,bypass

Open andclosed tank,piping


Open andclosed tank,piping(min DN 80)






Processconnection

Suspended assembly Suspended assembly,lap joint flange DN100, pressurised flange DN100/PN4adjustable flange DN100

Pressurised flangeDN80/PN16,ANSI 3" lbs 150JIS 10K80A


Thread G 1 DN20,flange DN25

DN25 thread adapter nut, TriClamp, Varivent, APV,dairy fitting DN50,Neumo BioControl

Thread G 1 1/4,thread NPT 1 1/4",flange DN32 PN16,flange ANSI 1 1/4"

DN25 thread adapter nut, TriClamp, Varivent, APV, dairy fitting DN50, flange DN50/PN10, flange ANSI 2“ / 150 lbs

DN25 thread adapter nut, TriClamp, Varivent, APV,dairy fitting DN50

Thread G 1 1/4 external,thread NPT 1"external,flange DN50 / ANSI 2",dairy fitting DN50

Thread G 1 1/4,flange DN50/PN16,flange ANSI 2" / 150 lbs

Flange DN50/PN16,flange ANSI 2“ / 150 lbs

DN 25 thread adapter nut, TriClamp, Varivent, APV, dairy fitting DN50, flange DN50/PN10, flange ANSI 2“ / 150 lbs

Material PCV - U PP PVDFstainless steel 1.4404 (AISI 316L)

PVDFstainless steel 1.4404 (AISI 316L)

PP Stainless steel 1.4435 (AISI 316L)

Stainless steel 1.4404 (AISI 316L)Hastelloy C4, titanium

Stainless steel 1.4435 (AISI 316L)


PP, PVDF, PEEK Stainless steel 1.4404 (AISI 316L)


Max. pressure Unpressurised 4 bar 6 or 10 bar 8 or 10 bar 6 bar 10 bar 4 (overpressure 20)bar 10 bar 4/6 or 10 bar 4/6 bar 4/6 or 10 bar 4/6 or 10 bar 4/6 or 10 bar

Max. temperature 60 °C 80 °C 120 or 150 °C 120 or 150 °C 80 °C 140 °C 130 °C 140 °C 80 or 140 °C 60 or 80 °C 80 or 140 °C 80 or 130 °C 80 or 140 °C

Immersion depth (as of process connection)

1430 mm 500 . . . 3000 mmspecial lengthson request

500 . . . 2500 mmspecial lengthson request

– – 10 . . . 86 mm Up to 700 mm 47 . . . 120 mm 66 . . . 208 mm 66 . . . 215 mm 61 . . . 235 mm 71 . . . 207 mm 48 . . . 102 mm

Sensor connection thread

G1/NPT 3/4“ 3x Pg 13.5 3x Pg 13.5 3x Pg 13.5 3x Pg 13.5 Pg 13.5 Pg 13.5 Pg 13.5 Pg 13.5 Pg 13.5 Pg 13.5 Pg 13.5 Pg 13.5

Certificates 3.1.B EN 10204 3.1.B EN 10204 3A, EHEDG ("in line steam sterilisability + cleanability")3.1.B EN 10204

3.1.B EN 10204 3A, "in line steam sterilisability" acc. to EHEDG test procedure3.1.B EN 10204

3.1.B EN 10204 3.1.B EN 10204 3A, "in line steam sterilisability" acc. to EHEDG test procedure3.1.B EN 10204

Associated cleaning systems

External spray cleaning Integrated spray cleaning CPR 31,external spray cleaning CPR 30

Integrated spray cleaning CPR 31

Spray cleaning connection G 1/2“

Spray cleaning connection with CPR 3

– Rinse chamber connection G 1/4

Integrated rinse chamber (Z-shape) with connection G 1/4 and G 1/2"

Integrated rinse chamber withconnection G 1/4 or NPT 1/4"




Integrated rinse chamber (Z-shape) with connection G 1/4 or NPT 1/4"

Overview of pH assemblies

Assemblies, whether used as immersion assemblies, flow assemblies or retractable assemblies, are the most important connecting element between the sensor and the process. Endress+Hauser is offering

100%-suitable solutions with regard to the design and material, to pressure resistance and comfort with the assemblies described and is thus the only manufacturer who can equip all measuring points safely and flexibly.

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Immersion assemblies Flow assemblies Permanent installation assemblies Retractable assemblies

Dipfit Dipfit Dipfit Flowfit Flowfit Unifit Cleanfit Probfit Cleanfit Cleanfit Cleanfit Cleanfit Cleanfit

CYA611 CPA111 CPA140 CPA240 CPA250 CPA442 CPA450 CPA465 CPA471 CPA472 CPA473 CPA474 CPA475Application Water, wastewater Water, wastewater,

processProcess Process Water Process, food,

pharmaceuticalsWater, wastewater, process







Description Simple assembly 3 electrode installation locations, 120 mm electrode,bayonet technology

3 electrode installation locations, 120 mm electrode,bayonet technology



120 mm electrodewith and withoutprotection guard

Manual,120 mm electrode







Area of use Open tank,open channel

Open tank,open channelclosed tank

Closed tank Piping,bypass

Piping,bypass









Processconnection

Suspended assembly Suspended assembly,lap joint flange DN100, pressurised flange DN100/PN4adjustable flange DN100



Thread G 1 DN20,flange DN25

DN25 thread adapter nut, TriClamp, Varivent, APV,dairy fitting DN50,Neumo BioControl

Thread G 1 1/4,thread NPT 1 1/4",flange DN32 PN16,flange ANSI 1 1/4"

DN25 thread adapter nut, TriClamp, Varivent, APV, dairy fitting DN50, flange DN50/PN10, flange ANSI 2“ / 150 lbs

DN25 thread adapter nut, TriClamp, Varivent, APV,dairy fitting DN50

Thread G 1 1/4 external,thread NPT 1"external,flange DN50 / ANSI 2",dairy fitting DN50

Thread G 1 1/4,flange DN50/PN16,flange ANSI 2" / 150 lbs

Flange DN50/PN16,flange ANSI 2“ / 150 lbs

DN 25 thread adapter nut, TriClamp, Varivent, APV, dairy fitting DN50, flange DN50/PN10, flange ANSI 2“ / 150 lbs

Material PCV - U PP PVDFstainless steel 1.4404 (AISI 316L)

PVDFstainless steel 1.4404 (AISI 316L)

PP Stainless steel 1.4435 (AISI 316L)

Stainless steel 1.4404 (AISI 316L)Hastelloy C4, titanium





Max. pressure Unpressurised 4 bar 6 or 10 bar 8 or 10 bar 6 bar 10 bar 4 (overpressure 20)bar 10 bar 4/6 or 10 bar 4/6 bar 4/6 or 10 bar 4/6 or 10 bar 4/6 or 10 bar

Max. temperature 60 °C 80 °C 120 or 150 °C 120 or 150 °C 80 °C 140 °C 130 °C 140 °C 80 or 140 °C 60 or 80 °C 80 or 140 °C 80 or 130 °C 80 or 140 °C

Immersion depth (as of process connection)

1430 mm 500 . . . 3000 mmspecial lengthson request

500 . . . 2500 mmspecial lengthson request

– – 10 . . . 86 mm Up to 700 mm 47 . . . 120 mm 66 . . . 208 mm 66 . . . 215 mm 61 . . . 235 mm 71 . . . 207 mm 48 . . . 102 mm

Sensor connection thread

G1/NPT 3/4“ 3x Pg 13.5 3x Pg 13.5 3x Pg 13.5 3x Pg 13.5 Pg 13.5 Pg 13.5 Pg 13.5 Pg 13.5 Pg 13.5 Pg 13.5 Pg 13.5 Pg 13.5

Certificates 3.1.B EN 10204 3.1.B EN 10204 3A, EHEDG ("in line steam sterilisability + cleanability")3.1.B EN 10204

3.1.B EN 10204 3A, "in line steam sterilisability" acc. to EHEDG test procedure3.1.B EN 10204

3.1.B EN 10204 3.1.B EN 10204 3A, "in line steam sterilisability" acc. to EHEDG test procedure3.1.B EN 10204

Associated cleaning systems

External spray cleaning Integrated spray cleaning CPR 31,external spray cleaning CPR 30

Integrated spray cleaning CPR 31

Spray cleaning connection G 1/2“

Spray cleaning connection with CPR 3

– Rinse chamber connection G 1/4

Integrated rinse chamber (Z-shape) with connection G 1/4 and G 1/2"





Integrated rinse chamber (Z-shape) with connection G 1/4 or NPT 1/4"

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Electrodes – Technical data

Quality and performance in the area of sensor technology are the deciding factors. In no other component of a measuring point is so much development competence and time invested than here. The range of manufacture, modularity with regard to the design technology and a high degree of automation guarantee the user absolutely

reliable quality, certainty and safety. At its locations in Waldheim (Saxony, Germany) and Los Angeles (USA), Endress+Hauser has the most modern pH electrode production worldwide. Computer-aided inspection units monitor the technical production quality during the production.

Orbisint Orbisint Ceragel Tophit Ceragel Ceraliquid Tophit Ceraliquid Orbipore Tophit Orbipac Orbipac Purisys

CPS11/CPS11D CPS12/CPS12D CPS71/CPS71D CPS471 CPS72/CPS72D CPS41/CPS41D CPS441 CPS42/CPS42D CPS91/CPS91D CPS491 CPF81 CPF82 CPF201Material Glass Glass Glass PEEK, EPDM Glass Glass PEEK, EPDM Glass Glass PEEK, perfluorelastomer PPS / Glass PPS / Glass SS316 L / Glass Material

Parameter pH ORP/redox pH pH ORP/redox pH pH ORP/redox pH pH pH ORP/redox pH Parameter

Meas. range 0-14 -1500 bis 1500 mV 0-14 0-14 -1500 bis 1500 mV 0-14 0-14 -1500 bis 1500 mV 0-14 0-14 0-11 (0-14) -1500 bis 1500 mV 0-14 Measuring range

Temperature 0-135 (-5-80) °C -15-135 °C 0-135 (-15-80) °C -15-135 °C -15-135 °C 0-130 (-15-80) °C -15-135 °C -15-130 °C 0-110 °C -15-110 °C 0-80 (0-110) °C 0-110 °C 0-75 °C Temperature

Temperaturesensor

Pt100, Pt1000 / integrated – Pt100, Pt1000 / integrated Pt1000 – Pt100 Pt1000 – Pt100, Pt1000 Pt1000 Pt100 Pt100 Pt100, Pt1000 Temperaturesensor

Minimumconductivity

≥ 50 µS/cm ≥ 50 µS/cm ≥ 10 µS/cm ≥ 10 µS/cm ≥ 10 µS/cm ≥ 0,1 µS/cm ≥ 0,1 µS/cm ≥ 0,1 µS/cm ≥ 500 µS/cm ≥ 500 µS/cm ≥ 50 µS/cm ≥ 50 µS/cm 0,05 - 100 µS/cm Minimumconductivity

Pressure up to 6 bar/16 bar 6 bar 13 bar 10 bar 13 bar 8 bar 10 bar 8 bar 13 bar 10 bar 3,5 bar (110 °C) 3,5 bar (110 °C) 3,5 bar Pressure up to

Diaphragm PTFE PTFE Ceramic Ceramic Ceramic Ceramic Ceramic Ceramic open open PTFE PTFE PTFE Diaphragm

Reference Gel Gel Gel Gel Gel liquid liquid liquid solid gel solid gel Gel Gel Gel Reference

Lengths [mm] 120/225/360/425 120/225/360/425 120/225/360/425 120/225/360/425 120/225/360/425 120/225/360/425 120/225/360/425 120/225/360/425 120/225/360/425 120/225/360/425 12,5/23/58,5 12,5/23/58,5 – Lengths [mm]

Cable CPK9 / CYK10 CPK9 / CPK10 CPK9 / CPK10 CPK12 CPK9 / CPK10 CPK9 / CPK10 CPK12 CPK9 / CPK10 CPK9 / CPK10 CPK12 fixed cable / CPK9 fixed cable / CPK9 CPK9 Cable

Certifikates ATEX, FM ATEX, FM ATEX, FM, 3A,biocompatible

ATEX, FM,3A, biocompatible

ATEX, FM ATEX, FM, 3A ATEX, FM, 3A ATEX, FM ATEX, FM ATEX, FM – – – Certificates

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The wide range of applications does not necessarily mean that there must be a wide range of different sensor types. Endress+Hauser offers the following four basic types which cover the entire application range:

• Sensors with teflon diaphragm and gel reference

• Sensors with ceramic diaphragm and gel reference

• Sensors with open aperture with gel reference as well as

• Sensors with ceramic diaphragm and liquid reference

CPS11 CPS71 CPS91 Tophit CPF81






Temperaturesensor


Minimumconductivity










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To ensure the safe transmission of measured values for contacting plug-in systems, double-screened measuring cables are required to prevent against electromagnetic interfering impulses.

A distinction is made between simple cables where only the pH value is transmitted right up to multi-pin cables which also allow temperature measured value transmission (TOP68).

With Memosens technology, the sensor data are digitalised directly in the sensor and transmitted with a standard bus cable of low impedance (CYK10).

DIN Koax-Kupplung (GSA) Memosens-KupplungTOP68-Kupplung (ESA)






Temperaturesensor


Minimumconductivity










Instruments International

Endress+Hauser GmbH+Co. KGInstruments InternationalP.O. Box 222279574 Weil am RheinGermanyTel. +49 7621 975 02Fax +49 7621 975 345http://[email protected]

03.05/MSC

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FA 007C/07/en/03.0551515969DT/INDD 2.0

Applications for pH sensors

CPS11 CPS41 CPS71 CPS91 CPF81 CPF201 CPS441 CPS471 CPS491

Chemical industryChemical production monitoring • • • • • •Chrome detoxification • •Colourants • • •Metal finishing and mining •Petrochemicals • •Refineries • •Power plants • • • • •Boiler feedwater • •Paper industry • • • •Non-aqueous media • • • •Resin production • •Starch • •Gelatine • •

Pharmaceutical industryBiotechnology • • • •Blood plasma fractioning • • • •Fermenters • • • •Pharmaceutical-chemical production • • • • •

Food and beveragesBeverages • • • • •Brewing water • • •Cheese production •Dairy, milk and yoghurt processing • • •Drinking water • •Fish farming •Sauces/ketchup • • •Yeast propagation • •Marmalade • •Puree •Drinks bottling •Sugar • •

Water treatmentGas scrubbers • •Boiler feedwater • •Cooling water • •Ultrapure water (semiconductor) • •Neutralisation • • • • •Drinking water • •

Municipal wastewater • •Industrial wastewater • • • • • • •Wastewater treatment

Tannery • •Detoxification • •Flue gas cleaning • • •Wastewater, galvanic • • •Heavy metal precipitation • • •Sludge draining • •Ground sanitation • • •

Instruments International

Endress+Hauser GmbH+Co. KGInstruments InternationalP.O. Box 222279574 Weil am RheinGermanyTel. +49 7621 975 02Fax +49 7621 975 345http://[email protected]

03.05/MSC

21

FA 007C/07/en/03.0551515969DT/INDD 2.0

Additional documentationTechnical information

Transmitter

TI 194C Liquisys M CPM223/253TI 233C Mycom S CPM153TI 381C Liquiline M CM42

Assemblies

TI 112C Dipfit W CPA111TI 179C Flowfit P CPA240TI 041C Flowfit W CPA250TI 306C Unifit H CPA442TI 183C Cleanfit W CPA450TI 146C Probfit H CPA465TI 217C Cleanfit P CPA471TI 223C Cleanfit P CPA472TI 344C Cleanfit P CPA473TI 345C Cleanfit P CPA474TI 240C Cleanfit H CPA475TI 166C Dipfit W CYA611

Sensors

TI 028C Orbisint CPS11TI 079C Ceraliquid CPS41TI 245C Ceragel CPS71TI 191C Orbipac CPF81TI 375C Orbipore CPS91TI 266C Purisys CPF201TI 352C Tophit CPS441TI 282C Tophit CPS471TI 377C Tophit CPS491

Cleaning and calibration systems

TI 235C Topclean S CPC30TI 236C Topcal S CPC300TI 046C Chemoclean CYR10BA 201C Chemoclean CPR31TI 342C Chemoclean CPR40

Further information is available under: www.analysis.endress.com

Documents

Competence in pH measurement - Access Instrumentationaccessinstrumentation.co.uk/PDFs/pHMeasurement.pdf · 6 7 pH measurement in food/pharmaceuticals Very high demands are made on