
Specs at a glance
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Measurement range
pH 0 to 14
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Process temperature
-15 to 135°C (5 to 275°F)
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Process pressure
Max. 11 bar abs at 100 °C
(Max. 160 psi at 212 °F)
Field of application
Memosens CPS77E is the expert for hygienic applications. Its bacteria-proof reference with highly stable gel guarantees reliable measurements. The unbreakable sensor is sterilizable with hot steam, autoclavable and assures highest product safety. CPS77E features Memosens 2.0 digital technology, offering extended storage of calibration and process data for predictive maintenance. The sensor resists moisture and enables lab calibration, enhancing process integrity and increasing process uptime.
Hygienic and sterile applications:
Food & beverage industry
Life sciences
Biotechnology
With all relevant approvals for hygienic applications such as EHEDG, 3A, EU1935/2004, USP 87/88.
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.
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Unbreakable PEEK sensor body ensures highest product safety where glass breakage is intolerable.
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With its certified biocompatibility and pharma compliance (optional Pharma CoC), the sensor protects the quality of your products.
The sensor is suitable for hot steam sterilization and autoclaving offering long-term stable measurements.
Low maintenance: ISFET technology is insensitive to temperature variations and shows virtually no acid or alkaline errors, allowing for long calibration intervals.
Six times higher CIP stability compared to conventional ISFET pH sensors ensures a longer lifetime even when the sensor is exposed to cleaning in place.
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Maximum process safety: Non-contact inductive signal transmission eliminates all problems due to moisture or corrosion.
Videos
Extended selection
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High-end products
- Highly functional and convenient
Technical excellence
Simplicity

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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
Variable
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
Variable |
Predecessor
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Operating Instruction (BA)
Memosens ISFET sensors CPS47E, CPS77E, CPS97E
English version - 09/2021
pH measurement
EN 14/09/2021Language:
English
Version:
14/09/2021
File size:
1 MB
File name:
BA02154CEN_0121.pdf
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Technical Information (TI)
Memosens CPS77E
English version - 09/2021
ISFET sensor for pH measurement
EN 15/09/2021Language:
English
Version:
15/09/2021
File size:
565.6 KB
File name:
TI01617CEN_0121.pdf
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Technical Information (TI)
Memosens CPS77E
ISFET sensor for pH measurement
EN 15/09/2021Language:
English
Version:
15/09/2021
File size:
565.6 KB
File name:
TI01617CEN_0121.pdf
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Operating Instruction (BA)
Memosens ISFET sensors CPS47E, CPS77E, CPS97E
pH measurement
EN 14/09/2021Language:
English
Version:
14/09/2021
File size:
1 MB
File name:
BA02154CEN_0121.pdf
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Ex Safety Instruction (XA)
Memosens ISFET pH sensors
pH measurement Supplement to BA02154C Safety instructions for electrical apparatus in explosion-hazardous areas NEPSI Ex ia IIC T3/T4/T6 Ga NEPSI Ex ia IIC T4/T6 Ga
EN 20/08/2021Language:
English
Version:
20/08/2021
File size:
526.2 KB
File name:
XA02691CEN_0121.pdf
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Ex Safety Instruction (XA)
Memosens ISFET pH sensors
pH measurement Supplement to BA02154C Safety instructions for electrical apparatus in explosion-hazardous areas UK Ex II 1 G Ex ia IIC T3/T4/T6 Ga Uk Ex II 1 G Ex ia IIC T4/T6 Ga
Language:
English
Version:
20/08/2021
File size:
675.8 KB
File name:
XA02647CEN_0121.pdf
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Ex Safety Instruction (XA)
Memosens ISFET pH sensors
pH measurement Supplement to BA02154C CSA C/US IS Cl. 1 Div. 1 GP A-D T3/T4/T6 + CSA C/US IS Cl. 1 Zone 0 AEx ia IIC T3/T4/T6 CSA C/US IS Cl. 1 Div. 1 GP A-D T4/T6 + CSA C/US IS Cl. 1 Zone 0 AEx ia IIC T4/T6 CSA C/ US Cl. 1 Div 1&2 GP A-D T6…T3
EN 15/02/202220/08/2021Language:
English
Version:
15/02/2022
File size:
656.8 KB
File name:
XA02689CEN_0222-00.pdf
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Ex Safety Instruction (XA)
Memosens ISFET pH sensors
pH measurement Supplement to BA02154C Safety instructions for electrical apparatus in explosion-hazardous areas KOR Ex ia IIC T3/T4/T6 Ga KOR Ex ia IIC T4/T6 Ga
EN 22/10/2021Language:
English
Version:
22/10/2021
File size:
421.3 KB
File name:
XA02699CEN_0121.pdf
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Ex Safety Instruction (XA)
Memosens ISFET pH sensors
pH measurement Supplement to BA02154C Safety instructions for electrical apparatus in explosion-hazardous areas ATEX II 1G Ex iaIIC T3/T4/T6 Ga ATEX II 1G Ex ia IIC T4/T6 Ga IECEx Ex ia IIC T3/T4/T6 Ga IECEx Ex ia IIC T4/T6 Ga
EN 27/08/2021Language:
English
Version:
27/08/2021
File size:
427.2 KB
File name:
XA02692CEN_0121.pdf
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Ex Safety Instruction (XA)
Memosens ISFET pH sensors
pH measurement Supplement to BA02154C Safety instructions for electrical apparatus in explosion-hazardous areas EAC Ex 0Ex ia IIC T3/T4/T6 Ga X EAC Ex 0Ex ia IIC T4/T6 Ga X
EN 18/01/2022Language:
English
Version:
18/01/2022
File size:
421 KB
File name:
XA02818CEN_0122-00.pdf
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Ex Safety Instruction (XA)
Memosens ISFET pH sensors
pH measurement Supplement to BA02154C Safety instructions for electrical apparatus in explosion-hazardous areas JPN Ex ia IIC T3/T4/T6 Ga JPN Ex ia IIC T4/T6 Ga
EN 20/08/2021Language:
English
Version:
20/08/2021
File size:
420 KB
File name:
XA02690CEN_0121.pdf
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Ex Safety Instruction (XA)
Memosens ISFET pH sensors
pH measurement Supplement to BA02154C Safety instructions for electrical apparatus in explosion-hazardous areas INMETRO Ex ia IIC T3/T4/T6 Ga INMETRO Ex ia IIC T4/T6 Ga
EN 20/08/2021Language:
English
Version:
20/08/2021
File size:
434.4 KB
File name:
XA02688CEN_0121.pdf
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