Memosens CPS92E

Summary

Product identification

Memosens CPS92E ORP sensor for use in heavily polluted media

Application

• Chemical processes
• Pulp and paper industry
• Contaminated media:
  • Solids
  • Emulsions
  • Precipitation reactions
  • Dispersions

Approvals for hazardous areas include ATEX, IECEx, CSA C/US, NEPSI, Japan Ex, and INMETRO.

Benefits

• Open aperture for use in heavily polluted media
• Low maintenance due to gel filling
• Long service life with stabilized bridging electrolyte gel
• Unaffected by fluctuations in pressure and temperature
• Integrated NTC 30K temperature sensor for effective temperature compensation

Memosens Technology Advantages

• Maximum process safety via non-contact, inductive signal transmission
• Data security through digital data transmission
• Ease of use with sensor data stored directly in the sensor
• Enables predictive maintenance by recording sensor load data

Function and System Design

Measuring Principle

• ORP Measurement: Measures the state of equilibria between oxidizing and reducing components. Uses a platinum or gold electrode with an integrated Ag/AgCl reference system.
• Temperature Measurement: Integrated NTC 30K temperature sensor.

Measuring System Components

A complete measuring system includes:

• ORP sensor CPS92E
• Transmitter (e.g., Liquiline CM42, CM44x)
• Memosens data cable (CYK10 or CYK20)
• Assembly (e.g., Immersion: Dipfit CPA111, Flow: Flowfit CPA240, Retractable: Cleanfit CPA871)
• Optional: Automatic cleaning and calibration system (e.g., Liquiline Control CDC90)

Communication and Data Processing

Digital sensors with Memosens technology must be connected to Memosens-compatible transmitters. Analog transmitters are not compatible.

Stored Sensor Data

• Manufacturer data
• Serial number
• Order code
• Date of manufacture
• Calibration data (date, offset for temperature and ORP, number of calibrations, history)
• Serial number of the last calibration transmitter
• Operating data (temperature and ORP application range, date of initial commissioning, maximum temperature, extreme condition operating hours, CIP counter)

These data can be displayed using Liquiline CM42, CM44x, and Memobase Plus CYZ71D.

Dependability

Reliability and Ease of Handling

• Integrated electronics store calibration and operational data.
• Automatic data transfer to the transmitter upon connection.
• Independent sensor calibration and adjustment possible in a lab.
• Quick replacement of pre-calibrated sensors increases measuring point availability.
• Accurate maintenance intervals and predictive maintenance are enabled by sensor history.
• Sensor history can be documented externally (e.g., Memobase Plus CYZ71D).

Interference Immunity

• Digitized measured values are transmitted non-contact and free from potential interference.
• Reliable detection and reporting of sensor failure or connection interruptions.

Safety

Maximum Process Safety

• Inductive, non-contact measured value transmission eliminates issues with moisture (corrosion, distorted values).
• Galvanic decoupling of the transmitter from the medium.
• Guaranteed Electromagnetic Compatibility (EMC) through shielding.
• Intrinsically safe electronics allow operation in hazardous areas.

Input

• Measured Variable: ORP, Temperature
• Measuring Range: –1500 to 1500 mV (ORP)

Electrical

• Connection: Memosens measuring cable (CYK10 or CYK20)

Performance Characteristics

• Reference System: Ag/AgCl reference lead, stabilized bridging electrolyte gel, 3 M KCl.

Installation

Orientation

• Avoid installing sensors upside-down.
• Minimum installation angle of 15° from the horizontal is required to prevent electrolyte separation at elevated temperatures and ensure electrolytic contact.

Installation Instructions

• Ensure assembly thread, O-rings, and sealing surfaces are clean and undamaged before installation.
• Refer to the Operating Instructions of the assembly used.
• Tighten sensor by hand with a torque of 3 Nm (2.21 lbf ft) when installing in Endress+Hauser assemblies.

Environment

• Ambient Temperature Range: 0 to 50 °C (32 to 122 °F). Do not use below freezing temperatures.
• Storage Temperature: 0 to 50 °C (32 to 122 °F).
• Degree of Protection: IP 68 (10 m (33 ft) water column, 25 °C (77 °F), 45 days, 1 M KCl).
• Electromagnetic Compatibility (EMC): As per EN 61326-1:2013, EN 61326-2-3:2013, NAMUR NE21:2017.

Process

• Process Temperature Range: 0 to 110 °C (32 to 230 °F).
• Process Pressure Range: 0.8 to 14 bar (11.6 to 203 psi) absolute. Caution is advised for pressurized sensors subjected to rapid heating under reduced or atmospheric pressure.
• Conductivity: > 500 μS/cm (with minimized flow, constant pressure and temperature).

Mechanical Construction

Design and Dimensions

• Sensor Shaft: Glass
• ORP Measuring Element: Platinum
• Metal Lead: Ag/AgCl
• O-ring: FKM
• Process Coupling: PPS fiber-glass reinforced
• Nameplate: Ceramic metal oxide
• Temperature Sensor: NTC 30K
• Plug-in Head: Memosens plug-in head (pressure resistance 16 bar (232 psi) relative)
• Process Connections: Pg 13.5

Installed Length and Weight

• 120 mm (4.72 in): 40 g (1.4 oz)
• 225 mm (8.86 in): 60 g (2.1 oz)
• 360 mm (14.17 in): 90 g (3.2 oz)

Certificates and Approvals

• CE Mark: Complies with EU directives.
• Ex Approvals:
  • ATEX: II 1G Ex ia IIC T4/T6 Ga
  • IECEx: Ex ia IIC T4/T6 Ga
  • NEPSI: Ex ia IIC T4/T6 Ga
  • CSA C/US: IS Cl. I Div 1, GP A-D Ex ia IIC T4/T6; IS Cl. I Zone 0, AEx ia IIC T4/T6
  • Japan Ex: Ex ia IIC T4/T6 Ga
  • INMETRO: Ex ia IIC T4/T6 Ga
  • EAC
• Additional Certification: TÜV certificate for Memosens plug-in head (Pressure resistance 16 bar (232 psi) relative).

Ordering Information

Product configuration is available via the Product Configurator on the Endress+Hauser website.

Scope of Delivery

• Sensor as ordered
• Operating Instructions
• Safety instructions for hazardous areas (for Ex-approved sensors)

Accessories

Device-Specific Accessories (Assemblies)

• Cleanfit CPA871
• Cleanfit CPA875
• Dipfit CPA140
• Cleanfit CPA473
• Cleanfit CPA474
• Dipfit CPA111
• Flowfit CPA240
• Flowfit CPA250
• Ecofit CPA640

Buffer Solutions

• ORP buffer solution CPY3 (220 mV, pH 7; 468 mV, pH 0.1)

Measuring Cable

• Memosens data cable CYK10
• Memosens laboratory cable CYK20

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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