Analysis - pH
pH sensors and transmitters
Products for high-quality pH measurement in all industries
More than 30% of all quality-relevant measurements in processes are pH measurements. That's why reliable pH sensors & transmitters are extremely important for plant optimization and process safety.
We offer an extensive portfolio for all conditions, such as stable processes, fast changing media compositions, sticky media, hazardous areas or hygienic applications. Discover our Endress+Hauser range of ISFET, enamel or glass pH sensors, transmitters, assemblies and calibration solutions.
Ashdale have had a lot of case studies in the Pharmeceutical industry with units performing well in the top ten pharmacem plants in Northern Ireland.
pH measurement with glass electrodes and enamel electrodes
The pH value is used as a unit of measurement for the acidity or alkalinity of a liquid medium. The pH-sensitive element of glass electrodes is a glass bulb that supplies an electrochemical potential which is dependent upon the pH value of the medium. This potential is generated because small H+ ions penetrate through the outer layer of the membrane while the larger negatively charged ions remain in the solution.
Glass pH probes contain an integrated Ag/AgCl reference system that serves as the required reference electrode. The pH value is calculated from the potential difference between the reference system and the measuring system using the Nernst equation. Our pH sensors and transmitters achieve outstanding linear measuring performance over an extremely wide pH range!
The measuring principle of enamel pH electrodes corresponds to that of glass pH sensors, however, the pH-sensitive element is enamel.
pH measurement with ISFET electrodes
The pH value is measured with an ion-selective field effect transistor (ISFET). It is a simple transistor with a source and drain that are separated from the base by a semiconductor. Hydrogen ions from the medium may accumulate here. The resulting positive charge on the outside is 'mirrored' on the inside of the base where a negative charge occurs. This makes the semiconductor channel conductive. The more H+ ions accumulate on the base, the more current can flow between the source and drain.
Benefits
Our pH sensors and transmitters meet all requirements from basic functionality up to multichannel and multiparameter measurement.
We offer pH buffers, pH solutions and pH standards for pH calibration to ultimate precision. They are produced in our own permanent calibration laboratory that has successfully passed the DAkkS accreditation (German accreditation authority).
The different types of electrodes cover all kinds of diaphragms and reference systems, from dirt-repellent PTFE junctions over highly sensitive ceramic diaphragms to blocking-resistant open apertures.
We offer pH assemblies for all fields of applications: fixed installation assemblies, immersion assemblies, flow assemblies and retractable assemblies.
Automated systems for calibration, adjustment and cleaning ensure optimum performance of the pH sensors and transmitters in chemical processes, pharmaceuticals production or hygienic applications.
Ashdale are proud to represent Endress+Hauser in Northern Ireland.
Our technical team are OEM trained and certified so you can trust us to provide the very best support for sales & service.
If you have an application, please get touch we love solving problems !
Liquiline CM444 Predecessor: CCM360 , Sludge level CUM750
Orbisint CPS11D Liquiline Control CDC90 Memosens CPS171D
Predecessor: Turbimax CUE21 , Sludge level CUC101 , Liquisys M CUM253 , Liquisys M CUM223 , ISEmax CAM40 , Liquisys M COM223F , Liquisys M COM253F , Stamosens CSM750 , Turbidity Transmitter CUM740 , Stamosens CNM750
Liquiline CM442R Liquiline Compact CM72 Liquiline Compact CM82
Cleanfit CPA871 Predecessor: Cleanfit P CPA472 , Cleanfit P CPA471
Cleanfit CPA875 Predecessor: Cleanfit H CPA475 , Probfit CPA465
Memobase Plus CYZ71D Predecessor: 51515945 , Memobase CYZ41D
Ceragel CPS71D Memosens CPS77D .Flexdip CYA112
Predecessor: CPA530 , CPA610 , Dipfit W CYA611
Flexdip CYH112 Predecessor: Universal CYH101
Orbipac CPF81D Orbipac CPF82D Orbisint CPS12D Memosens CPS16D
Ceramax CPS341D Ceraliquid CPS41D Ceraliquid CPS42D
Memosens CPS47D Ceragel CPS72D Memosens CPS76D Orbipore CPS91D
Orbipore CPS92D Memosens CPS96D Memosens CPS97D
Flowfit CCA250 Liquiline CM14 Liquiline M CM42
Predecessor: Mycom S CLM153 , Mycom S CPM153 , CLD431 , Mypro CLM431 , Mypro CPM431
Liquiline CM444R Liquiline CM448 Liquiline CM448R
Liquiline CM44P Predecessor: Memograph CVM40
Liquiline Mobile CML18 Dipfit CPA111 Predecessor: CPA110 , CPA120
Dipfit CPA140 Flowfit CPA240 Predecessor: CPA320 Flowfit CPA250
Predecessor: CPA320
Unifit CPA442 Predecessor: CPA440 , CPA441 Successor: Unifit CPA842
CPA450 Predecessor: CPA461 Cleanfit CPA472D
Cleanfit CPA473 Predecessor: Cleanfit P CPA477 , CPA463
CPA474 Predecessor: CPA463 Ecofit CPA640 Predecessor: CPA642
Unifit CPA842 Predecessor: Unifit H CPA442
Purisys CPF201Orbipac CPF81 Predecessor: CPF91 , CPF10
Orbipac CPF82 Predecessor: CPF92 Memosens CPL51E
Liquisys CPM223 Predecessor: CPM120 , CPM121 , CPM220 , CPM221
Liquisys CPM253
Predecessor: CPM141S , CPM240S , CPM140 , CPM130 , CPM141 , CPM230 , CPM240 , CPM151 , CPM252
Orbisint CPS11 Orbisint CPS12 Predecessor: CPS22 Ceratex CPS31 Ceraliquid CPS41
Ceraliquid CPS42 Tophit CPS441 Tophit CPS441D Tophit CPS471 Predecessor: CPS401
Tophit CPS471D Tophit CPS491 Tophit CPS491D Ceragel CPS71 Ceragel CPS72
Predecessor: CPS32 Orbipore CPS91 Orbipore CPS92 CPY20
Predecessor: CPY1 , Buffer CPY2 , CPY1 Flowfit CYA21
CYA680 Cleanfit Control CYC25 Predecessor: Topclean S CPC30
CYK10 CYK11 CYK20 Memosens Analog Converter CYM17 Memocheck CYP02D
Successor: CYP02E Memocheck Sim CYP03D Predecessor: Memocheck Plus CYP01D
Cleaning injector CYR10B Cleaning injector Chemoclean CYR10B
Ceragel CPS72D Memosens CPS76D Orbipore
CPS91D Orbipore CPS92D Memosens CPS96D Memosens CPS97D
Memosens ISFET Flowfit CCA250 Liquiline CM14 Liquiline M CM42
Predecessor: Mycom S CLM153 , Mycom S CPM153 , CLD431 , Mypro CLM431 ,
Mypro CPM431
Liquiline CM444R Liquiline CM448 Liquiline CM448R Liquiline CM44P
Predecessor: Memograph CVM40 Liquiline Mobile CML18
Dipfit CPA111 Dipfit CPA140 Flowfit CPA240
Flowfit CPA250 Flowfit CPA250 Unifit CPA442 Predecessor: CPA461
Cleanfit CPA473 Predecessor: Cleanfit P CPA477 , CPA463
CPA474 Predecessor: CPA463 Ecofit CPA640 Predecessor: CPA642
Unifit CPA842 Predecessor: Unifit H CPA442 Purisys CPF201
Orbipac CPF81 Predecessor: CPF91 , CPF10 Orbipac CPF82 Predecessor: CPF92
Memosens CPL51ELiquisys CPM223 Predecessor: CPM120 , CPM121 , CPM220 , CPM221
Liquisys CPM253
Predecessor: CPM141S , CPM240S , CPM140 , CPM130 , CPM141 , CPM230 , CPM240 , CPM151 , CPM252
Orbisint CPS11 Orbisint CPS12 Predecessor: CPS22
Ceratex CPS31 Ceraliquid CPS41 Ceraliquid CPS42 Tophit CPS441 Tophit CPS441D
Tophit CPS471 Predecessor: CPS401 Tophit CPS471D Tophit CPS491
Tophit CPS491D Ceragel CPS71 Ceragel CPS72 Predecessor: CPS32
Orbipore CPS91 Orbipore CPS92 CPY20
Flowfit CYA21 CYA680 Cleanfit Control CYC25 Topclean S CPC30
CYK10 CYK11 CYK20 CYM17
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