 
                  Specs at a glance
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                              Measuring rangepH 0 to 14 
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                              Process temperatureVersion LH: 0 to 110 °C (32 to 230 °F) 
 Version NN: 0 to 80 °C (32 to 170 °F)
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                              Process pressure1 to 10 bar abs at 80 °C 
 (15 to 145 psi at 176 °F)
Field of application
Memosens CPF81E is the digital, robust solution for harsh environments. It measures reliably and accurately even in abrasive media and at high flow rates. With its integrated assembly, the electrode saves installation space. Thanks to Memosens 2.0 digital technology, CPF81E combines maximum process integrity with simple operation. It resists moisture and enables lab calibration. It offers extended storage of calibration and process data providing the perfect basis for predictive maintenance.
Memosens CPF81E is the robust pH sensor for processes in mining industries and treatment of industrial water and wastewater. It monitors:
- Flotation 
- Leaching 
- Neutralization 
- Inlet and outlet 
With CSA C/US approval for use in hazardous areas, zones 0, 1 and 2.
Benefits
- Memosens 2.0 offers extended storage of calibration and process data, enabling better trend identification and providing a future-proof basis for predictive maintenance and enhanced IIoT services. 
- Long time stable: Double junction provides better protection against electrode poisoning ions such as S2- or CN-. 
- Robust polymer housing protects against mechanical damage. 
- Optional flat membrane makes the sensor suitable for high flow rates and abrasive media. 
- Non-contact, inductive signal transmission ensures maximum process safety. 
- Maximum process uptime and extended sensor lifetime reduce operating costs. 
Videos
Extended selection
- 
        High-end products 
- Highly functional and convenient
Technical excellence
Simplicity
 
                              - 
        Standard products 
- Reliable, robust and low-maintenance
Technical excellence
Simplicity
- 
        Specialized products 
- Designed for demanding applications
Technical excellence
Simplicity
Variable
| FLEX selections | Technical excellence | Simplicity | 
|---|---|---|
| 
 Fundamental selection Meet your basic measurement needs | Technical excellence | Simplicity | 
| 
 Lean selection Handle your core processes easily | Technical excellence | Simplicity | 
| 
 Extended selection Optimize your processes with innovative technologies | Technical excellence | Simplicity | 
| 
 Xpert selection Master your most challenging applications | Technical excellence | Simplicity Variable | 
Predecessor
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                                                    Technical Information (TI)
 Memosens CPF81EEnglish version - 04/2021 pH sensor for mining operations, industrial water and wastewater treatment EN 07/04/2021Language: English Version: 07/04/2021 File size: 924.4 KB File name: TI01594CEN_0121.pdf 
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                                                    Fields of Activities (FA)
 Sensors, transmitters, compact devices and assembliesEnglish version - 09/2024 Experts in Liquid Analysis Language: English Version: 24/09/2024 File size: 4.2 MB File name: FA00007CEN_Analyse_21.24_LowRes.pdf 
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                                                            Technical Information (TI)
 Memosens CPF81EpH sensor for mining operations, industrial water and wastewater 
 treatmentEN 07/04/2021Language: English Version: 07/04/2021 File size: 924.4 KB File name: TI01594CEN_0121.pdf 
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                                                            Operating Instruction (BA)
 pH sensors CPSx1E, CPFx1E ORP sensors CPSx2E, CPFx2EpH and ORP measurement EN 14/10/202131/03/202109/07/202019/05/2020Language: English Version: 14/10/2021 File size: 1 MB File name: BA01988CEN_0421.pdf 
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                                                            Ex Safety Instruction (XA)
 Memosens pH/ORP sensorsCSA C/US IS Cl. I Div. 1 GP A-D T3/T4/T6 + CSA C/US IS Cl. I Zone 0 AEx 
 ia IIC T3/T4/T6
 CSA C/US IS Cl. I Div. 1 GP A-D T4/T6 + CSA C/US IS Cl. I Zone 0 AEx ia
 IIC T4/T6
 CSA C/ US Cl. 1 Div 1&2 GP A-D T6…T3
 Safety InstructionsEN 01/12/202215/02/202220/08/2020Language: English Version: 01/12/2022 File size: 860.7 KB File name: XA02235CEN_0422-00.pdf 
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                                                            Fields of Activities (FA)
 Sensors, transmitters, compact devices and assembliesExperts in Liquid Analysis Language: English Version: 24/09/2024 File size: 4.2 MB File name: FA00007CEN_Analyse_21.24_LowRes.pdf 
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                                                            Fields of Activities (FA)
 Sensoren, Messumformer, Kompaktgeräte and ArmaturenKompetenz in der Flüssigkeitsanalyse Language: German Version: 24/09/2024 File size: 4.1 MB File name: FA00007CDE_Analyse_21.24_LowRes.pdf 
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                                                            Fields of Activities (FA)
 Endress+Hauser 水質分析計ファミリラインナップと事例 Language: Japanese Version: 23/03/2017 File size: 34.8 MB File name: FA00007CJA_2022_Endress Hauser liquid analysis family.pdf 
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                                                            White paper (WP)
 Damit bei der pH-Messung höchste Genauigkeit garantiert istKalibrierung,Justierung und Verifizierung Language: German Version: 07/04/2021 File size: 605.2 KB File name: WP01154C07DE_01.21_Damit bei der pH-Messung hoechste Genauigkeit garantiert ist.pdf 
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                                                            White paper (WP)
 Ensuring maximum accuracy in pH measurementCalibration, adjustment and verification Language: English Version: 07/04/2021 File size: 600 KB File name: WP01154C07EN_01.21_Ensuring maximum accuracy in pH measurement.pdf 
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                                                            AI (Application note)
 Smart vertical farming in big citiesCost-efficient and intuitive monitoring of nutrient supply Language: English Version: 25/11/2021 File size: 544.4 KB File name: AI01343C_Smart vertical farming in big cities.pdf 
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                                                            AI (Application note)
 Smart Vertical Farming in GroßstädtenKosteneffiziente und intuitive Überwachung der Nährstoffversorgung Language: German Version: 25/11/2021 File size: 648 KB File name: AI01343C_Smart vertical farming in Grossstaedten.pdf 
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