 
                  Specs at a glance
- 
                              Measuring rangepH 1 - 12 
- 
                              Process temperature0 - 80 C (32 - 176 F) 
- 
                              Process pressure1 - 4 bar abs (15 - 60 psi) 
Field of application
Ceratex CPS31 is the analog 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.
- Drinking water 
- Swimming pool water 
- pH compensation for free chlorine measurement 
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 
Videos
- 
        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 | 
- 
                        
                                      - 
                                                    Technical Information (TI)
 Memosens CPS31D and Ceratex CPS31English version - 03/2022 pH sensors for drinking water and swimming pool water EN 16/03/202219/04/201301/01/2001Language: English Version: 16/03/2022 File size: 863 KB File name: TI00030CEN_1422-00.pdf 
- 
                                                    
- 
                        - 
                                                            Technical Information (TI)
 Memosens CPS31D and Ceratex CPS31pH sensors for drinking water and swimming pool water EN 16/03/202219/04/201301/01/2001Language: English Version: 16/03/2022 File size: 863 KB File name: TI00030CEN_1422-00.pdf 
- 
                                                            
- 
                        - 
                                                            Ex Safety Instruction (XA)
 Analog pH/ORP sensorspH/ORP measurement 
 Supplement to BA01572C, BA02056C
 Safety instructions for electrical apparatus in explosion-hazardous
 areas
 ATEX II 1G Ex ia IIC T3/T4/T6 GaEN 21/10/202101/10/200802/11/200301/07/200301/07/2002Language: English Version: 21/10/2021 File size: 493.2 KB File name: XA00028CEN_1121.pdf 
- 
                                                            
- 
                        - 
                                                            Ex Safety Instruction (XA)
 Analog ph/ORP sensors Temperature probe CTS1pH/ORP measurement 
 Supplement to BA01572C, BA02056C
 Safety instructions for electrical apparatus in explosion-hazardous
 areas
 UKEx II 1 G Ex ia IIC T3/T4/T6 GaLanguage: English Version: 08/12/2021 File size: 427.3 KB File name: XA02785CEN_0121-00.pdf 
- 
                                                            
- 
                        - 
                                                            EU Declaration
 Product family: CeraGel, CeraLiquid, CeraTex, OrbiPore, OrbiSint, OrbiTex, SensorProduct root: CPS11-, CPS12-, CPS13-, CPS21-, CPS31-, CPS41-, CPS42-, CPS43-, CPS64-, CPS71-, CPS72-, CPS91-, CPS92-, CTS1- 
 Declaration number: EC_00624_04.24EN 18/10/2024Language: English Version: 18/10/2024 File size: 227.6 KB File name: EC_00624_04.24_CPSxx_Ex_.pdf 
- 
                                                            
- 
                        - 
                                                            EU Declaration
 Product family: CeraGel, CeraLiquid, CeraTex, NoryLab, OrbiPore, OrbiSint, OrbiTex, Sensor, TopHitProduct root: CPS11-, CPS12-, CPS13-, CPS21-, CPS31-, CPS41-, CPS42-, CPS43-, CPS441-, CPS471-, CPS491-, CPS51-, CPS52-, CPS64-, CPS 
 65-, CPS71-, CPS72-, CPS91-, CPS92-
 Declaration number: EU_00921_02.23EN 09/01/2023Language: English Version: 09/01/2023 File size: 276.3 KB File name: EU_00921_02.23 CPS nonEx.pdf 
- 
                                                            
- 
                        - 
                                                            UK Conformity Assessed
 Product family: CeraGel, CeraLiquid, CeraTex, OrbiPore, OrbiSint, OrbiTex, SensorProduct root: CPS11-, CPS12-, CPS31-, CPS41-, CPS71-, CPS72-, CPS91-, CTS1- 
 Declaration number: UK_00442_01.21Language: English Version: 25/10/2021 File size: 292.5 KB File name: UK_00442_01.21_CPSxx Ex.pdf 
- 
                                                            
- 
                        - 
                                                            Explosion Protection
 Product family: CeraGel, CeraLiquid, CeraTex, OrbiPore, OrbiSint, SensorProduct root: CPS11-, CPS12-, CPS31-, CPS41-, CPS71-, CPS72-, CPS91-, CPS92-, CTS1- 
 Region: Great Britain
 Approval agency: CML
 Protection: Ex i Zone 0Language: English Version: 18/11/2021 File size: 166.5 KB File name: CML 21UKEX21249 Iss. 0.pdf 
- 
                                                            
- 
                        - 
                                                            Explosion Protection
 Product family: CeraGel, CeraLiquid, CeraTex, OrbiPore, OrbiSint, OrbiTex, SensorProduct root: CPS11-, CPS12-, CPS13-, CPS21-, CPS31-, CPS41-, CPS42-, CPS43-, CPS71-, CPS72-, CPS91-, CPS92-, CTS1- 
 Region: Europe
 Approval agency: TÜV
 Protection: Ex i Zone 0Language: English Version: 09/08/2021 File size: 700.2 KB File name: Scan_TUV 21 ATEX 8708rev01_incl-annex_signed.pdf 
- 
                                                            
 
                                             
                                             
                                     
                                     
                                     
                                     
                                     
                                     
                                   
                                   
                                   
                                   
                                  