Competence in ph measurement. Sensors, assemblies and transmitters for all applications

Transcription

1 Competence in ph measurement Sensors, assemblies and transmitters for all applications

2 Solutions for liquid analysis 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 nonglass 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. Research and development pay 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. 2

3 Modular measuring point concept The 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-touse 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. Service means more than just maintenance Perfectly 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 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. 3

4 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. Assemblies 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. Dipfit CPA140 Flow assemblies Flowfit 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 possible Unifit CPA442 installation assemblies Simple permanent installation Integrated protection guard protects against electrode breakage Low-cost pipe and boiler mounting Retractable assemblies for high demands 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 Cleanfit CPA471 Cleanfit CPA450 Cleanfit CPA475 Flowfit CPA240 Unifit CPA442 4

5 Transmitters 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. Mycom S CPM153 Liquiline M CM42 transmitter Two-wire transmitter with large, highcontrast 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 Liquiline M CM42 Sensors New sensor technologies open up new applications All 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/CPS491 New 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 Orbisint CPS11D Ceraliquid CPS41D Orbipore CPS91D Tophit CPS441 Tophit CPS491 5

6 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. Assemblies Cleanfit CPA475 and CPA465 retractable assemblies Automation especially of hygienic processes possible In-line steam sterilisability according to EHEDG test procedure 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 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 Electrolyte vessel Cleanfit CPA475/465 Cleanfit CPA475/465 Cleanfit CPA475/465 Unifit CPA442 6

7 Liquisys M CPM253 Mycom S CPM153 Liquiline M CM42 Liquisys M CPM223 Transmitters 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 Sensors Ceraliquid CPS41 with 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 medium biocompatible Horizontal mounting and overhead installation possible Sterilisable, autoclavable, cleanability according to EHEDG test procedure 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 automatic calibration and cleaning system Topcal S CPC300 Ceraliquid CPS71 CIP/steam-sterilisable/autoclavable glass sensor for sterile ph measurement Certified biocompatibility of all materials in contact with medium Especially low-maintenance thanks to double chamber reference with integrated bridge electrolyte Reference gel free from acrylamide and polyacrylamide Ceraliquid CPS41D Tophit CPS441 Liquiline M CM42 transmitter Two-wire transmitter with large, highcontrast 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 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 Ceragel CPS71D Tophit CPS471 7

8 ph measurement in water/wastewater The treatment of drinking water or wastewater 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. Assemblies 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 Dipfit CYA611 immersion assembly 3 possible ways of securing unit: Wall mounting, suspension bracket, pendulum mounting Simple sensor mounting via G1 and NPT 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. 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. Chemoclean CPR31 spray cleaning system The spray cleaning unit can be retrofitted any time without the need to convert the assembly. CYH101 Chemoclean CPR31 Cleanfit CPA473 Dipfit CYA611 Cleanfit CPA450 Dipfit CPA111 Flowfit CPA250 8

9 Transmitters 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 Simple two-point calibration by means of Cal key Safe to operate: overvoltage protection (high-voltage protector) to EN Directly accessible manual control of contacts Calibration plausibility check Customised alarm configuration for faultsignalling 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 Liquisys M CPM253 Liquisys M CPM223 Sensors Orbisint CPS11 We 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. Ceraliquid CPS41 The 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 CPS91 The 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. Orbipac CPF81 ph combination electrodes with "integrated" assembly as simplest mechanical adaptation in pipelines or immersion assemblies Double chamber reference with KNO3 electrolyte bridge Optionally available with flat membrane and integrated potential matching Orbisint CPS11D Ceraliquid CPS41D Orbipore CPS91D Orbipac CPF81 9

10 System solutions for ph measuring technology Fully automatic measuring, calibration, sterilisation and cleaning with Endress+Hauser. 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. Topcal S The 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. Topclean S Topclean 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. Chemoclean Chemoclean 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. 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) 10

11 Low-maintenance and cost-effective measurement with Endress+Hauser. Topcal S CPC300 Topclean S CPC30 Chemoclean Fully automatic ph measuring point with integrated control Calibration Sterilisation Cleaning Rinsing Fully automatic ph measuring point with integrated control Sterilisation Cleaning Rinsin ph measuring point with automatic cleaning system Cleaning Rinsing ph transmitters Mycom S CPM153 ph/redox transmitter with controller and limit functions for Ex and non-ex areas Mycom S CPM153 Liquisys M CPM223/253 ph assemblies Retractable assemblies Cleanfit Compact ph assemblies in various materials for all process connections Cleanfit CPA473 Process retractable assembly with ball valve shut-off Cleanfit CPA475 Sterilisable retractable assembly for the highest hygienic requirements Immersion assemblies Dipfit CPA111 Dipfit CPA140 Flow assemblies Flowfit CPA250 Flowfit CPA240 Spray cleaning systems Chemoclean CPR3 Chemoclean CPR30 Chemoclean CPR31 Zubehör CPR40 rinse block For 1 or 2 additional valves (sterilisation) CYR10 injector Cleaning injector for Chemoclean system with valves for motive water and cleaning agents Toolkit Parawin For off-line configuration of Topcal S/Topclean S at the PC For Chemoclean in conjunction with Mycom S 11

12 ph sensors with Memosens technology 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 highimpedance connection to the transmitter. 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 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. Memosens makes the ph electrode a digital sensor with integrated data storage ph 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 used to 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. 12

13 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 itself takes place under optimum external conditions in the measuring lab. Standard sensor Calibration on site Sensor with Memosens Calibration in the measuring lab sensor removal sensor removal sensor installation sensor installation Calibration / adjustment Saving sensor data QS documentation Optimum lab conditions Measuring point maintenance Measurement An unestablished connection between the sensor and transmitter is actively displayed the first really definite connection Digital 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 The first non-contact measured value transmission from the ph sensor to the transmitter ph 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 EMC safety through galvanic decoupling of medium from transmitter Highly 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. Inductive signal transmission Inductive energy transmission 13

14 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 membrane whose 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. Internal buffer ph 7 Glass membrane H + H + H + H + H + H + H + H + Cl - H + H + H + H + Cl - Cl - Medium Voltage occurrence with ph measurement with glass electrodes Glass electrodes Recommended area of application General application 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 Gel Technology Very robust, Heavy-duty version / high pressure, integrated potential matching, flat membrane, Ceraliquid CPS41 Special applications with high requirements with regard to accuracy, 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 pressure to prevent clogging, Gel-free, refillable electrolyte, 3A Ceragel CPS71 Hygiene and sterile applications Pharmaceuticals, biotechnology, fermenters, contaminating media, overhead installation Ceramic diaphragm, Double chamber and double gel reference Ex, all shaft lengths with temperature sensor, Memosens, Advanced Gel Technology Overhead installation, CIP/SIP and autoclavable, with high accuracy, Free from acrylamide and polyacrylamide, 3A, biocompatible Orbipore CPS91 Process applications Media with high contamination: emulsions, suspensions, precipitation reactions Open aperture, Double gel reference Ex, all shaft lengths with temperature sensor, Memosens, Advanced Gel Technology Rapid response, new, stabilised gel insensitive to contamination 14

15 Non-glass ph sensors Apart from using a glass membrane, the ph value can also be measured using an ionselective 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 measurement 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. Source Semiconductor element H + Gate H + H + 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. Drain Non-glass sensors Recommended area of application General application Diaphragm/ reference Version Special characteristics/ features Tophit CPS441 Special applications with high requirements with regard to accuracy 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 at low 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 Gel Technology 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, nonglass, break-proof Low temperatures, emulsions, suspensions, organic solvents Open aperture, double gel reference Ex, all shaft lengths with temperature sensor, Advanced Gel Technology Overhead installation, rapid response at low temperatures, stabilised gel insensitive to contamination lower amount of maintenance required than with glass 15

16 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. Immersion assemblies Flow assemblies Permanent installation assemblies Dipfit Dipfit Dipfit Flowfit Flowfit Unifit CYA611 CPA111 CPA140 CPA240 CPA250 CPA442 Application Water, wastewater Water, wastewater, process Description Simple assembly 3 electrode installation locations, 120 mm electrode, bayonet technology Process Process Water Process, food, pharmaceuticals 3 electrode installation locations, 120 mm electrode, bayonet technology 3 electrode installation locations, 120 mm electrode 3 electrode installation locations, 120 mm electrode 120 mm electrode with and without protection guard Area of use Open tank, open channel Open tank, open channel closed tank Closed tank Piping, bypass Piping, bypass Open and closed tank, piping Process connection Suspended assembly Suspended assembly, lap joint flange DN100, pressurised flange DN100/PN4 adjustable flange DN100 Pressurised flange DN80/PN16, ANSI 3" lbs 150 JIS 10K80A Pressurised flange DN25/PN16, ANSI 1" lbs 150 JIS 10K25A Thread G 1 DN20, flange DN25 DN25 thread adapter nut, TriClamp, Varivent, APV, dairy fitting DN50, Neumo BioControl Material PCV - U PP PVDF stainless steel (AISI 316L) PVDF stainless steel (AISI 316L) PP Stainless steel (AISI 316L) Max. pressure Unpressurised 4 bar 6 or 10 bar 8 or 10 bar 6 bar 10 bar Max. temperature 60 C 80 C 120 or 150 C 120 or 150 C 80 C 140 C Immersion depth (as of process connection) Sensor connection thread 1430 mm mm special lengths on request mm special lengths on request mm G1/NPT 3/4 3x Pg x Pg x Pg x Pg 13.5 Pg 13.5 Certificates 3.1.B EN B EN A, EHEDG ("in line steam sterilisability + cleanability") 3.1.B EN 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 16

17 Retractable assemblies Cleanfit Probfit Cleanfit Cleanfit Cleanfit Cleanfit Cleanfit CPA450 CPA465 CPA471 CPA472 CPA473 CPA474 CPA475 Water, wastewater, process Manual, 120 mm electrode Food, process, pharmaceuticals Manual or pneumatic, can be fully automated with CPC30/300 Water, wastewater, process Manual or pneumatic, can be fully automated with CPC30/300 Water, wastewater, process Manual or pneumatic, can be fully automated with CPC30/300 Water, wastewater, process Manual or pneumatic, can be fully automated with CPC30/300 Water, wastewater, process Manual or pneumatic, can be fully automated with CPC30/300 Food, process, pharmaceuticals Manual or pneumatic, can be fully automated with CPC30/300 Open and closed tank, piping Open and closed tank, piping (min DN 80) Open and closed tank, piping (min DN 80) Open and closed tank, piping (min DN 80) Open and closed tank, piping (min DN 80) Open and closed tank, piping (min DN 80) Open and closed tank, piping (min DN 80) 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 Stainless steel (AISI 316L) Hastelloy C4, titanium Stainless steel (AISI 316L) Stainless steel (AISI 316L) PP, PVDF, PEEK Stainless steel (AISI 316L) PP, PVDF, PEEK Stainless steel (AISI 316L) 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 130 C 140 C 80 or 140 C 60 or 80 C 80 or 140 C 80 or 130 C 80 or 140 C Up to 700 mm mm mm mm mm mm mm Pg 13.5 Pg 13.5 Pg 13.5 Pg 13.5 Pg 13.5 Pg 13.5 Pg B EN Rinse chamber connection G 1/4 3A, "in line steam sterilisability" acc. to EHEDG test procedure 3.1.B EN Integrated rinse chamber (Z-shape) with connection G 1/4 and G 1/2" 3.1.B EN B EN A, "in line steam sterilisability" acc. to EHEDG test procedure 3.1.B EN Integrated rinse chamber with connection G 1/4 or NPT 1/4" Integrated rinse chamber with connection G 1/4 or NPT 1/4" Integrated rinse chamber with connection G 1/4 or NPT 1/4" Integrated rinse chamber with connection G 1/4 or NPT 1/4" Integrated rinse chamber (Z-shape) with connection G 1/4 or NPT 1/4" 17

18 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 CPS11/CPS11D CPS12/CPS12D CPS71/CPS71D CPS471 CPS72/CPS72D Material Glass Glass Glass PEEK, EPDM Glass Parameter ph ORP/redox ph ph ORP/redox Meas. range bis 1500 mv bis 1500 mv Temperature (-5-80) C C (-15-80) C C C Temperature sensor Minimum conductivity Pt100, Pt1000 / integrated Pt100, Pt1000 / integrated Pt µs/cm 50 µs/cm 10 µs/cm 10 µs/cm 10 µs/cm Pressure up to 6 bar/16 bar 6 bar 13 bar 10 bar 13 bar Diaphragm PTFE PTFE Ceramic Ceramic Ceramic Reference Gel Gel Gel Gel Gel Lengths [mm] 120/225/360/ /225/360/ /225/360/ /225/360/ /225/360/425 Cable CPK9 / CYK10 CPK9 / CPK10 CPK9 / CPK10 CPK12 CPK9 / CPK10 Certifikates ATEX, FM ATEX, FM ATEX, FM, 3A, biocompatible ATEX, FM, 3A, biocompatible ATEX, FM 18

19 CPS11 CPS71 CPS91 Tophit CPF81 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 Ceraliquid Tophit Ceraliquid Orbipore Tophit CPS41/CPS41D CPS441 CPS42/CPS42D CPS91/CPS91D CPS491 Glass PEEK, EPDM Glass Glass PEEK, perfluorelastomer ph ph ORP/redox ph ph bis 1500 mv (-15-80) C C C C C Pt100 Pt1000 Pt100, Pt1000 Pt1000 0,1 µs/cm 0,1 µs/cm 0,1 µs/cm 500 µs/cm 500 µs/cm 8 bar 10 bar 8 bar 13 bar 10 bar Ceramic Ceramic Ceramic open open liquid liquid liquid solid gel solid gel 120/225/360/ /225/360/ /225/360/ /225/360/ /225/360/425 CPK9 / CPK10 CPK12 CPK9 / CPK10 CPK9 / CPK10 CPK12 ATEX, FM, 3A ATEX, FM, 3A ATEX, FM ATEX, FM ATEX, FM 19

20 DIN Koax-Kupplung (GSA) TOP68-Kupplung (ESA) Memosens-Kupplung 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). Orbipac Orbipac Purisys CPF81 CPF82 CPF201 PPS / Glass PPS / Glass SS316 L / Glass Material ph ORP/redox ph Parameter 0-11 (0-14) bis 1500 mv 0-14 Measuring range 0-80 (0-110) C C 0-75 C Temperature Pt100 Pt100 Pt100, Pt1000 Temperature sensor 50 µs/cm 50 µs/cm 0, µs/cm Minimum conductivity 3,5 bar (110 C) 3,5 bar (110 C) 3,5 bar Pressure up to PTFE PTFE PTFE Diaphragm Gel Gel Gel Reference 12,5/23/58,5 12,5/23/58,5 Lengths [mm] fixed cable / CPK9 fixed cable / CPK9 CPK9 Cable Certificates 20

21 Applications for ph sensors Chemical industry CPS11 CPS41 CPS71 CPS91 CPF81 CPF201 CPS441 CPS471 CPS491 Chemical 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 industry Biotechnology Blood plasma fractioning Fermenters Pharmaceutical-chemical production Food and beverages Beverages Brewing water Cheese production Dairy, milk and yoghurt processing Drinking water Fish farming Sauces/ketchup Yeast propagation Marmalade Puree Drinks bottling Sugar Water treatment Gas 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 21

22 Additional documentation Technical information Transmitter TI 194C Liquisys M CPM223/253 TI 233C Mycom S CPM153 TI 381C Liquiline M CM42 Assemblies TI 112C Dipfit W CPA111 TI 179C Flowfit P CPA240 TI 041C Flowfit W CPA250 TI 306C Unifit H CPA442 TI 183C Cleanfit W CPA450 TI 146C Probfit H CPA465 TI 217C Cleanfit P CPA471 TI 223C Cleanfit P CPA472 TI 344C Cleanfit P CPA473 TI 345C Cleanfit P CPA474 TI 240C Cleanfit H CPA475 TI 166C Dipfit W CYA611 Sensors TI 028C Orbisint CPS11 TI 079C Ceraliquid CPS41 TI 245C Ceragel CPS71 TI 191C Orbipac CPF81 TI 375C Orbipore CPS91 TI 266C Purisys CPF201 TI 352C Tophit CPS441 TI 282C Tophit CPS471 TI 377C Tophit CPS491 Cleaning and calibration systems TI 235C Topclean S CPC30 TI 236C Topcal S CPC300 TI 046C Chemoclean CYR10 BA 201C Chemoclean CPR31 TI 342C Chemoclean CPR40 Further information is available under: Instruments International 03.05/MSC Endress+Hauser GmbH+Co. KG Instruments International P.O. Box Weil am Rhein Germany Tel Fax info@ii.endress.com FA 007C/07/en/ DT/INDD 2.0