Orbipore CPS91

Summary

Product Identification

Orbipore CPS91D and CPS91 pH electrodes, analog or with digital Memosens technology.

Application

• Chemical processes
• Pulp and paper industry
• Flue gas cleaning
• Contaminated media (solids, emulsions, precipitation reactions)

The sensors have ATEX, FM, and CSA approval for use in hazardous areas.

Operating Limits

• Ambient temperature range: -15 to 50 °C (5 to 122 °F). Note: Sensor must not be used if temperature drops below -15 °C (5 °F).
• Storage temperature: 0 to 50 °C (32 to 122 °F).

Process Limits

• Process temperature: 0 to 110 °C (32 to 230 °F)
• Process pressure (absolute): 1 to 14 bar (15 to 203 psi)
  • Note: Avoid excessive heating of sensors under reduced or atmospheric pressure to prevent glass breakage.
• Minimum conductivity: 500 μS/cm
• pH range: 0 to 14 pH

See the official PDF for exact pressure-temperature ratings.

Input

• Measured variables: pH value, Temperature
• Measuring range:
  • pH: 0 to 14 pH
  • Temperature: 0 to 110 °C (32 to 230 °F)

Mechanical Construction

• Electrode shaft material: Glass
• pH membrane glasses: Type B
• Metal lead: Ag/AgCl
• Diaphragm: Open aperture junction
• Process connection: Pg 13.5
• Weight: 0.1 kg (0.2 lbs)

Temperature Sensor

• CPS91D: NTC30K
• CPS91: Pt100, Pt1000

Plug-in Heads

• CPS91D: Memosens plug-in head for digital, non-contact data transmission.
• CPS91:
  • ESA: Threaded plug-in head Pg 13.5, TOP68 for electrodes with and without a temperature sensor, 17 bar abs. (246 psi) overpressure protection (threefold), Ex.
  • GSA: Threaded plug-in head Pg 13.5 for electrodes without a temperature sensor.

Reference System

• BO version: Ag/AgCl reference lead with reference electrolyte
• BT version: Ag/AgCl reference lead with ion trap

Electrical

Degree of Protection

• Memosens plug-in head: IP 68 (10 m (33 ft) water column, 25 °C (77 °F), 45 days, 1 M KCl)
• TOP68 plug-in head: IP 68 (1 m (3.3 ft) water column, 50 °C (122 °F), 168 h)
• GSA plug-in head (with closed connector system): IP 67

Certificates and Approvals

• Ex approval for CPS91D:
  • ATEX II 1G Ex ia IIC T4/T6 Ga
  • FM / CSA Class I Div. 2, in conjunction with Liquiline M CM42 and Mycom S CPM153 transmitters
• Ex approval for CPS91 (TOP68):
  • ATEX II 1G Ex ia IIC T4/T6 Ga
  • FM Class I Div. 2, in conjunction with Liquiline M CM42 and Mycom S CPM153 transmitters
• TÜV certificate for Memosens plug-in head: Pressure resistance 16 bar rel. (232 psi), minimum three times the safety pressure.
• TÜV certificate for TOP68 plug-in head: Pressure resistance 16 bar rel. (232 psi), minimum three times the safety pressure.
• CPS91D electromagnetic compatibility: Interference emission and interference immunity as per EN 61326: 2012.

Memosens Technology Advantages

• Maximum process safety and data security via digital data transmission.
• Easy to use with sensor data saved in the sensor.
• Enables predictive maintenance through recording of sensor load data.
• Calibration can be performed independently of the measuring point.
• Quick and easy replacement of pre-calibrated sensors increases measuring point availability.
• Eliminates problems caused by moisture (corrosion-free connection, connection under water).
• Galvanically decoupled from the medium.
• EMC safety guaranteed by screening.
• Intrinsically safe electronics for hazardous areas.

Installation

• Electrodes must not be installed upside down.
• Angle of inclination must be at least 15° from the horizontal.
• Ensure threaded connection of the assembly is clean and runs smoothly before screwing in the electrode.
• Screw in electrode finger-tight (3 Nm) when using Endress+Hauser assemblies.
• Follow installation instructions in the Operating Instructions of the used assembly.

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