Ceragel CPS72

Summary

Product identification

• Product Name: Ceragel CPS72 and CPS72D
• Type: ORP electrodes, analog and digital with Memosens technology
• Intended Use: Process technology, hygienic and sterile applications with poison-resistant reference and ion trap.
• Approvals: ATEX, FM, and CSA for hazardous areas.

Application Areas

• Hygienic and sterile applications (sterilizable, autoclavable):
  • Fermenters
  • Biotechnology
  • Pharmaceutical industry
  • Food industry
• Process technology and monitoring:
  • Rapidly changing ORP measured values
  • Processes with a high proportion of electrode poisons such as H₂S

Key Features and Benefits

• Certified biocompatibility, no cytotoxicity
• Acrylamide-free bridging electrolyte
• Integrated temperature sensor (for Memosens versions)
• Poison-resistant reference with ion trap for extended service life
• Bridging electrolyte free of silver ions
• Suitable for CIP/SIP cleaning and autoclavable (depending on version, up to 140 °C / 284 °F)
• Short response times due to ceramic junction
• Long service life ensured by ion trap protection against poisoning
• Memosens technology (CPS72D) for digital, non-contact data transmission, ensuring process safety by eliminating moisture issues and galvanic decoupling.
• Automatic error message generation and immediate error detection with Memosens.
• Convenient calibration in the lab, quick replacement of precalibrated sensors, and predictive maintenance capabilities with Memosens.

Measuring Principle

• Measured Variable: Oxidation-Reduction Potential (ORP)
• Sensing Element: Gold or platinum electrode (instead of glass membrane).
• Reference System: Integrated Ag/AgCl reference system.

Operating Limits

• ORP Measuring Range: -1500 to 1500 mV
• Process Temperature Range:
  • -15 to 140 °C (5 to 284 °F)
  • -15 to 135 °C (5 to 275 °F) for sensors with Ex approval and analog sensors.
• Ambient Temperature Range:
  • Operating: Not specified, but sensor must not be used below -15 °C (5 °F).
  • Storage: 0 to 50 °C (32 to 120 °F).
• Process Pressure (absolute): 0.8 to 11 bar (12 to 160 psi)

Electrical Characteristics

• Memosens Technology (CPS72D):
  • Inductive, non-contact data transmission.
  • Digitizes measured values in the sensor.
  • Galvanically decoupled from the medium.
  • EMC safety guaranteed by screening.
  • Intrinsically safe electronics for hazardous areas.
• Data Storage (CPS72D): Manufacturer data, calibration data, operating data can be saved in the sensor.

Mechanical Construction

• Materials:
  • Electrode Shaft: Glass
  • Reference System: Ag/AgCl
  • Junction: Ceramic (sterilizable and autoclavable)
  • ORP-sensitive Element: Platinum
  • Bridging Electrolyte: Acrylamide-free, non-cytotoxic, gel.
• Process Connection: Pg 13.5 thread
• Plug-in Heads: GSA (non-Ex), ESA (Ex, for analog), Memosens (digital, Ex or non-Ex).
• Weight: 0.1 kg (0.22 lbs)

Certificates and Approvals

• Ex Approval (CPS72 ESA, CPS72D): ATEX/NEPSI, FM/CSA, IECEx.
• Biocompatibility: Certified according to ISO 10993-5:1993, USP <87>.
• TÜV Certificate (ESA and Memosens): Pressure resistance 16 bar (232 psi).
• Electromagnetic Compatibility (CPS72D): Interference emission and immunity as per EN 61326:2006.

Installation Instructions

• Orientation: Electrodes must not be installed upside down. Inclination angle must be at least 15° from the horizontal.
• Assembly: Finger-tighten electrode (3 Nm) when installing in Endress+Hauser assemblies.

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Disclaimer: This extraction may miss figures, footnotes, or revisions. Contractual data must match the OEM PDF revision used on the project.

Official datasheet (PDF)

Lenntech datasheet mirror