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Memosens CPS171D: high-performing pH sensor for reliable measurement in biotech processes.

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The sensor has a certified biocompatibility according to USP class VI which provides highest safety for your batch with respect to cytotoxicity and bioreactivity.

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The sensor’s specialized glass membrane and pressurized reference system with ion trap make the sensor accurate and stable over various batch cycles.

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The sensor stores all necessary process and sensor data such as the operating hours, the calibration history and the number of SIP and autoclaving cycles in its Memosens head.

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Conveniently maintain and calibrate your Memosens CPS171D sensor under controlled conditions in your lab with the Memobase Plus software.

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Install the precalibrated Memosens CPS171D sensor in your fermenter and your measurement is instantly ready for the next batch.

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Simple sensor exchange in your bioreactor/fermenter can be performed in seconds thanks to the lockable bayonet connector and automatic sensor identification.
Specs at a glance
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Measurement range
pH 0 to 14
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Process temperature
0 to 135 °C (32 to 275 °F)
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Process pressure
1 to 7 bar abs (14.5 to 101.5 psi)
Field of application
Keep the pH value of your batch in the optimum range and maximize your product yield with Memosens CPS171D. Thanks to its rugged design and long-term stability, it provides extremely accurate, reproducible and reliable measuring values even after CIP/SIP and autoclaving. Memosens CPS171D is not the latest Memosens generation. To get information on the new Memosens CPS61E sensor with extended functionality, click here.
Memosens CPS171D measures pH in:
Biotech and pharma industries
- Bioreactors/fermenters: process control in enzyme production
- Bioreactors/fermenters: control of culture growthFood & Beverages
- CIP/SIP applications
With its international explosion protection approvals, such as ATEX and IECEx, the digital sensor is suitable for hazardous area use.
A pharma certificate of compliance with sensor serial number specified is available.
Benefits
The sensor's exceptional accuracy, reproducibility and reliability helps you to keep the pH value in the optimum range for a maximized product yield.
A specialized glass membrane and reference system makes the sensor CIP/SIP and autoclaving resistant (up to 140°C/284°F) offering maximum long-term stability.
Thanks to the Memosens technology, the cable connection cannot be affected by moisture or corrosion: you can count on the sensor's highest availability and your batch is safe.
The sensor protects your product quality with its certified biocompatibility according to USP class VI, FDA compliance of wetted parts, no cytotoxicity, bioreactivity or animal-based materials.
The sensor provides you with process and sensor data that allows you to decide if the sensor is ready for the next batch or should be replaced - a big improvement for your product safety.
Streamline maintenance of CPS171D with the Memobase Plus software that automatically stores and documents all relevant sensor and process data.
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Approved for hazardous area use.
Videos
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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.
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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.
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 |
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Measuring principle
Potentiometric
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Application
Hygienic and sterile applications, bioreactor, fermenter, biotechnology, pharmaceutical industry, foods
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Characteristic
Digital pH electrodes for bioreactors and biotechnology production processes with ion
trap for long-term stable reference -
Measurement range
pH 0 to 14
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Measuring principle
Ceramic diaphragm, ion-trap
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Design
All shaft lengths with temperature sensor
Advanced gel technology
Digital electrode with Memosens technology -
Material
Glass and ceramic
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Dimension
Diameter: 12 mm (0.47 inch)
Shaft lengths: 120, 225, 360 and 425 mm
(4.72, 8.86, 14.2 and 16.7 inch) -
Process temperature
0 to 135 °C (32 to 275 °F)
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Process pressure
1 to 7 bar abs (14.5 to 101.5 psi)
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Temperature sensor
NTC 30k
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Ex certification
IECEx, ATEX, NEPSI, FM, CSA
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Connection
Inductive, digital connection head with Memosens technology
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