Digital pH sensor
Memosens CPS31D
The pH-value of a liquid can be calculated using the potentiometric measurement principle. This video shows what it is about and how this measuring principle works.
Memosens converts the measured value to a digital signal and transfers it to the transmitter without a contacting connection. This video shows how Memosens optimizes process control and maintenance.
Memosens glass electrode for application in drinking water and swimming pools
Memosens CPS31D is the digital expert for pH compensation in disinfection processes. Its three diaphragms make it suitable for minimum conductivity while its low drift guarantees stable measurement. The sensor makes sure that swimming pool water is agreeable and drinking water tasteful. Thanks to Memosens technology, CPS31D combines maximum process and data integrity with simple operation. It resists corrosion and moisture, enables lab calibration and facilitates predictive maintenance.
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Standard products
- Reliable, robust and low-maintenance
Technical excellence
Simplicity
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Specialized products
- Designed for demanding applications
Technical excellence
Simplicity
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| FLEX selections | Technical excellence | Simplicity |
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Fundamental selection Meet your basic measurement needs |
Technical excellence
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Simplicity
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Lean selection Handle your core processes easily |
Technical excellence
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Simplicity
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Extended selection Optimize your processes with innovative technologies |
Technical excellence
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Simplicity
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Xpert selection Master your most challenging applications |
Technical excellence
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Simplicity
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Specs at a glance
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Measurement range
pH 1 to 12
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Process temperature
0 to 80 °C
(32 to 176 °F) -
Process pressure
1 to 4 bar
(15 to 60 psi)
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Loading alternative products
Additional components
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Benefits
Reliable measurement at minimum conductivity thanks to three diaphragms
Low drift by very low level of ion depletion in electrolyte
Optional salt ring for extended operating time
Maximum process safety through non-contact inductive signal transmission
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Field of application
Drinking water
Swimming pool water
pH compensation for free chlorine measurement
Documents / Manuals / Software
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Technical Information CPS31D/CPS31
pH electrodes with ceramic-diaphragm and gel filling
Technical Information (TI) -
pH/ORP sensors and reference half cells
Sensors with Memosens technology and analog sensors
Operating Instruction (BA) -
Memosens pH/ORP
Sicherheitshinweise für elektrische Betriebsmittel im
explosionsgefährdeten Bereich
Safety instructions for electrical apparatus for explosion-hazardous
areas
Conseils de sécurité pour matériels électriques destinés aux zones
explosibles
Safety Instructions
Safety instructions for electrical apparatus for explosion-hazardous
areasEx Safety Instructions (XA) -
Expertise in liquid analysis
From sensors to complete turnkey solutions
Fields of Activities (FA)03/19English -
Kompetenz in der Flüssigkeitsanalyse
Vom Sensor bis zur schlüsselfertigen Komplettlösung
Fields of Activities (FA)03/19German -
Jistota v analýze kapalin
Od senzorů po kompletní dodávku na klíč
Fields of Activities (FA)01/17Czech -
Esperti nell’analisi dei liquidi
Dai sensori singoli a soluzioni
complete “chiavi in mano”Fields of Activities (FA)01/17Italian -
Catálogo Portfolio Analítica
Desde sensores hasta soluciones completas
Fields of Activities (FA)01/17Spanish -
Aus Freude an gutem Wasser
Frische Ideen für Wasserwerke, Verteilernetze, Oberflächenwasser und
IndustrieanlagenCompetence Brochure (CP)06/20German -
For the love of quality water
Fresh ideas for waterworks, distribution networks, surface waters and
industrial plants.Competence Brochure (CP)06/19English -
pH-Messung in Industrieprozessen
Auswahl- und Engineering-Hilfe für verschiedene Industriebranchen und
ApplikationenCompetence Brochure (CP)03/20German -
pH measurement in industrial processes
Selection and engineering guide for different industries and
applicationsCompetence Brochure (CP)02/20English -
A turnkey solution for free chlorine measurement
A turnkey solution for free chlorine measurement
Complete EPA compliant
reagent-less free chlorine measurement systemCompetence Brochure (CP)01/17English -
Une mesure de chlore libre pour le suivi de la désinfection de l’eau
Le Syndicat des Eaux de Basse-Vigneulles et Faulquemont fait confiance
aux platines
d’analyse d’Endress+HauserCase Studies (CS)06/21French -
Damit bei der pH-Messung höchste Genauigkeit garantiert ist
Kalibrierung,Justierung und Verifizierung
Case Studies (CS)04/21German -
Ensuring maximum accuracy in pH measurement
Calibration, adjustment and verification
Case Studies (CS)04/21English -
Memosens digital sensor technology for liquid analysis
(mp4 format, 61.7 MB)
La technologie Memosens Endress et Hauser révolutionne l'analyse
physico-
chimique. Elle convertit les valeurs mesurées en signaux numériques et
les transfère
au transmetteur via une connexion sans contact.
Les capteurs Memosens mémorisent les données d'étalonnage, de capteur et
de
process, ce qui permet un contrôle précis du process et une maintenance
optimale.Animation11/15French -
Memosens digital sensor technology for liquid analysis
(mp4 format, 61.7 MB)
De Memosens technologie van Endress+Hauser is een revolutie in
vloeistofanalyse.
Het zet een analoge meetwaarde om in een digitaal signaal dat geheel
galvanisch
gescheiden naar de transmitter gaat.
Memosens sensoren slaan kalibratie-, sensor- en procesdata op in hun
interne
geheugen. Dit zorgt voor een juiste processturing en optimaal onderhoud.Animation11/15French -
Memosens digital sensor technology for liquid analysis
(flv format, 17.2 MB)
Memosens converts the measured value to a digital signal and transfers
it to the transmitter without a contacting connection.
This video shows how it works and how people in process analytics
profit from it.Animation08/15English -
Memosens - Digitale Sensortechnologie für die Flüssigkeitsanalyse
(flv-Format, 17.8 MB)
Memosens digitalisiert den Messwert im Sensor und überträgt ihn
kontaktlos zum Messumformer.
Dieses Video zeigt, wie Memosens funktioniert und wie PAT-Mitarbeiter
davon profitieren.Animation08/15German -
Memosens digital sensor technology for liquid analysis
(mp4 format, 61.7 MB)
Memosens converts the measured value to a digital signal and transfers
it to the transmitter without a contacting connection.
This video shows how it works and how people in process analytics
profit from it.Animation08/15English -
Memosens - Digitale Sensortechnologie für die Flüssigkeitsanalyse
(mp4-Format, 61.7 MB)
Memosens digitalisiert den Messwert im Sensor und überträgt ihn
kontaktlos zum
Messumformer.
Dieses Video zeigt, wie Memosens funktioniert und wie PAT-Mitarbeiter
davon
profitieren.Animation08/15German -
Tecnología Memosens - Fácil, segura y sencilla (mp4-Format, 61.7 MB)
La tecnología Memosens de Endress+Hauser ha revolucionado el análisis de
líquidos.
Convierte el valor medido en una señal digital, y la transfiere por
inducción al transmisor.Animation08/15Spanish -
CeraGel, CeraLiquid, Memosens, OrbiPore, OrbiSint
Product Code: CPS11-, CPS11D-, CPS12D-, CPS31D-, CPS41-, CPS41D-, CPS71D-, CPS72D-, CPS91D-
Declaration Number: HE_01182_01.19
Manufacturer Specification: RoHSManufacturer DeclarationChinese -
TopHit, OrbiSint, OrbiPore, Messkabel, Memosens, Memocheck, Ceramax, CeraLiquid, CeraGel
Product Code: CYP03D-, CYP02D-, CYP01D-, CYK20-, CYK10-, CPS96D-, CPS92D-, CPS91D-, CPS76D-, CPS72D-, CPS71D-, CPS491D-, CPS471D-, CPS441D-, CPS42D-, CPS41D-, CPS341D-, CPS31D-, CPS171D-, CPS16D-, CPS12D-, CPS11D-
Declaration Number: EC_00105_02.15EU DeclarationGerman , English , French -
OxyMax W, OxyMax H, OrbiSint, OrbiPore, OrbiPac, Messkabel, Memosens, Liquiline, InduMax P, InduMax H, ConduMax W, ConduMax H, CeraLiquid, CeraGel
Product Code: CYK20-, CYK10-, CPS92D-, CPS72D-, CPS71D-, CPS42D-, CPS41D-, CPS31D-, CPS16D-, CPS12D-, CPS11D-, CPF82D-, COS81D-, COS51D-, COS22D-, COS21D-, CML18-, CLS82D-, CLS54D-, CLS50D-, CLS21D-, CLS16D-, CLS15D-
Declaration Number: EC_00828_01.20EU DeclarationGerman , English , French -
TopHit, Sensor, PuriSys, OrbiSint, OrbiPore, OrbiPac, Memosens, Liquisys pH/ORP, Liquisys Oxygen, Liquisys Chlorine, Liquiline M, Liquiline, CeraTex, Ceramax, CeraLiquid, CeraGel
Product Code: CPS47D-, CPS471D-, CPS471-, CPS441D-, CPS441-, CPS42D-, CPS42-, CPS41E-, CPS41D-, CPS41-, CPS341D-, CPS31D-, CPS31-, CPS171D-, CPS16D-, CPS491-, CPS491D-, CPS64-, CPS71-, CPS71D-, CPS71E-, CPS72-, CPS72D-, CPS76D-, CPS77D-, CPS91-, CPS91E-, CPS92-, CPS92D-, CPS96D-, CPS97D-, CCM223-, CCM253-, CM14-, CM42-, CM442-, CM442R-, CM444-, CM444R-, CM448-, CM448R-, CM44P-, CM72-, CM82-, COM223-, COM223F-, COM253-, COM253F-, CPF201-, CPF81-, CPF81D-, CPF82-, CPF82D-, CPM223-, CPM253-, CPS11-, CPS11D-, CPS11E-, CPS12-, CPS12D-, CPS12E-, CPS13-
Region/Country: Russia (TR CU)
Approval Agency: EAC
Approval Number: EAEC D-DE.AD07.B.01363/19MiscellaneousRussian -
TopHit, Sensor, PuriSys, OrbiSint, OrbiPore, OrbiPac, Memosens, Liquisys pH/ORP, Liquisys Oxygen, Liquisys Chlorine, Liquiline M, Liquiline, CeraTex, Ceramax, CeraLiquid, CeraGel
Product Code: CPS491-, CPS47D-, CPS471D-, CPS471-, CPS441D-, CPS441-, CPS42D-, CPS42-, CPS41E-, CPS41D-, CPS41-, CPS341D-, CPS31D-, CPS31-, CPS171D-, CPS491D-, CPS64-, CPS71-, CPS71D-, CPS71E-, CPS72-, CPS72D-, CPS76D-, CPS77D-, CPS91-, CPS91D-, CPS91E-, CPS92-, CPS92D-, CPS96D-, CPS97D-, CPS16D-, CCM223-, CCM253-, CM14-, CM42-, CM442-, CM442R-, CM444-, CM444R-, CM448-, CM448R-, CM44P-, CM72-, CM82-, COM223-, COM223F-, COM253-, COM253F-, CPF201-, CPF81-, CPF81D-, CPF82-, CPF82D-, CPM223-, CPM253-, CPS11-, CPS11D-, CPS11E-, CPS12-, CPS12D-, CPS12E-, CPS13-
Region/Country: Russia (TR CU)
Approval Agency: EAC
Approval Number: EAEC RU D-DE.AD07.B.01362/19MiscellaneousRussian -
TopHit, OxyMax W, OxyMax H, OrbiSint, OrbiPore, Messkabel, Memosens, Memocheck, ConduMax W, ConduMax H, Ceramax, CeraLiquid, CeraGel
Product Code: CYP02D-, CYP01D-, CYK20-, CYK10-, CPS96D-, CPS92D-, CPS91D-, CPS76D-, CPS72D-, CPS71D-, CPS491D-, CPS471D-, CPS441D-, CPS42D-, CLS15D-, CLS16D-, CLS21D-, CLS82D-, COS22D-, COS51D-, COS81D-, CPS11D-, CPS12D-, CPS16D-, CPS171D-, CPS31D-, CPS341D-, CPS41D-
Region/Country: International (IECEx)
Approval Agency: EXAM (DMT, BVS)Explosion ProtectionEnglish -
CeraGel, CeraLiquid, Memosens, Messkabel, OrbiPore, OrbiSint
Product Code: CYK20-, CYK10-, CPS96D-, CPS92D-, CPS91D-, CPS76D-, CPS72D-, CPS71D-, CPS42D-, CPS41D-, CPS31D-, CPS171D-, CPS16D-, CPS12D-, CPS11D-
Region/Country: China
Approval Agency: NEPSIExplosion ProtectionChinese -
CeraGel, CeraLiquid, Memosens, Messkabel, OrbiPore, OrbiSint
Product Code: CYK20-, CYK10-, CPS96D-, CPS92D-, CPS91D-, CPS76D-, CPS72D-, CPS71D-, CPS42D-, CPS41D-, CPS31D-, CPS171D-, CPS16D-, CPS12D-, CPS11D-
Region/Country: China
Approval Agency: NEPSIExplosion ProtectionChinese -
TopHit, Memosens, ConduMax W, OrbiSint, OxyMax W, OxyMax H, OrbiPore, Messkabel, Memocheck, ConduMax H, Ceramax, CeraLiquid, CeraGel
Product Code: CYP02D-, COS22D-, COS51D-, CLS82D-, CLS21D-, CLS16D-, CYP01D-, CYK20-, CYK10-, CPS96D-, CPS92D-, CPS91D-, CPS76D-, CPS72D-, CPS71D-, CPS491D-, CPS471D-, CPS441D-, CPS42D-, CLS15D-, COS81D-, CPS11D-, CPS12D-, CPS16D-, CPS171D-, CPS31D-, CPS341D-, CPS41D-
Region/Country: International (IECEx)
Approval Agency: EXAM (DMT, BVS)Explosion ProtectionEnglish -
CeraGel, CeraLiquid, Memosens, OrbiPore, OrbiSint
Product Code: CPS11D-, CPS12D-, CPS16D-, CPS31D-, CPS41D-, CPS42D-, CPS71D-, CPS72D-, CPS76D-, CPS91D-, CPS92D-, CPS96D-
Region/Country: Canada (CRN)
Approval Agency: CRNPressure EquipmentEnglish -
Viomax, Turbimax, TopHit, OxyMax W, OxyMax H, OrbiSint, OrbiPore, OrbiPac, Memosens, Liquiline M, Liquiline, Isemax, InduMax P, InduMax H, ConduMax W, ConduMax H, Chloromax, Ceramax, CeraLiquid, CeraGel
Product Code: CPS47D-, CPS471D-, CPS441D-, CPS42D-, CPS41E-, CPS41D-, CPS341D-, CPS31D-, CPS171D-, CPS16D-, CPS12E-, CPS12D-, CPS11E-, CPS11D-, CPS491D-, CPS71D-, CPS71E-, CPS72D-, CPS76D-, CPS77D-, CPS91D-, CPS91E-, CPS92D-, CPS96D-, CPS97D-, CUS50D-, CUS51D-, CUS52D-, CAS40D-, CCS120D-, CCS142D-, CCS50D-, CCS51D-, CLS15D-, CLS15E-, CLS16D-, CLS16E-, CLS21D-, CLS21E-, CLS50D-, CLS54D-, CLS82D-, CLS82E-, CM14-, CM442-, CM442R-, CM444-, CM444R-, CM448-, CM448R-, COS22D-, COS51D-, COS61D-, COS81D-, CPF81D-, CPF82D-
Region/Country: Russia
Approval Agency: Rosstandart
Approval Number: OC.C.31.004.A NO 54218/1MetrologyRussian -
Viomax, New Analyzer Platform, Memosens, InduMax P, Turbimax, TopHit, Sample Preparations, OxyMax W, OxyMax H, OrbiSint, OrbiPore, OrbiPac, OEM, ConduMax W, InduMax H, ConduMax H, Chloromax, Ceramax, CeraLiquid, CeraGel
Product Code: CPS16D-, CAS51D-, CLS50D-, COS22D-, CLS82D-, CLS54D-, CAT860-, CA80AL-, COS51D-, CPS171D-, CPS31D-, CPS341D-, CPS41D-, CPS42D-, CPS441D-, CPS471D-, CPS491D-, CPS71D-, CPS72D-, CPS76D-, CPS91D-, CPS92D-, CUS50D-, CUS52D-, CPS12D-, CPS96D-, OCCS50D-, OCUS51D-, CPS11D-, CPF82D-, CPF81D-, COS81D-, COS61D-, CLS21D-, CLS16D-, CLS15D-, CCS142D-, CAT820-, CAT810-
Region/Country: Russia
Approval Agency: Rosstandart
Approval Number: DE.C.31.004.A NO 70194MetrologyRussian -
Turbimax, TopHit, OxyMax W, OxyMax H, OrbiSint, OrbiPore, OrbiPac, New Analyzer Platform, Memosens, InduMax P, InduMax H, ConduMax W, ConduMax H, Chloromax, Ceramax, CeraLiquid, CeraGel
Product Code: CPS171D-, CPS31D-, CPS341D-, CPS41D-, CPS41E-, CPS42D-, CPS441D-, CPS471D-, CPS47D-, CPS491D-, CPS71D-, CPS71E-, CPS72D-, CPS76D-, CPS77D-, CPS91D-, CPS91E-, CPS92D-, CPS96D-, CPS97D-, CUS50D-, CUS51D-, CUS52D-, CA80HA-, CA80SI-, CCS120D-, CCS142D-, CCS50D-, CCS51D-, CLS15D-, CLS16D-, CLS21D-, CLS50D-, CLS54D-, CLS82D-, COS22D-, COS51D-, COS61D-, COS81D-, CPF81D-, CPF82D-, CPS11D-, CPS11E-, CPS12D-, CPS12E-, CPS16D-
Region/Country: Russia
Approval Number: OC.C.31.004.A NO 75181MetrologyRussian
Accessories / Spare parts
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Order code 71038228
Memoclip label Memosens sensor
for assignment of sensors to measuring loop. 100 sensor clips with printable labels
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Order code CPY20-
Technical buffer solution CPY20
pH quality buffer solution, referenced to primary reference material of PTB and standard reference material of NIST. in DAkkS accredited buffer Laboratory.
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Order code CPY4-
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