Memosens CPS16E

Summary

Product identification

Memosens CPS16E pH/ORP sensor for standard applications in process technology and environmental engineering.

Application

Long-term monitoring or limit control in processes with stable conditions, including:

• Chemical processes
• Pulp and paper industry
• Incinerator plants and gas scrubbers
• Mining
• Wastewater

The sensor has ATEX, IECEx, CSA C/US, NEPSI, Japan Ex and INMETRO approvals for use in hazardous areas Zone 0, Zone 1 and Zone 2.

Measuring principles

• pH measurement: Measures acidity or alkalinity based on an electrochemical potential generated by H⁺ ion accumulation on the membrane glass. An Ag/AgCl reference system is used.
• ORP measurement: Measures the balance between oxidizing and reducing components using a platinum electrode and an Ag/AgCl reference system.
• rH measurement: Calculated from simultaneous pH and ORP measurements using the formula: rH = 2 · (mV/S) + 2 pH. The rH value indicates the oxidation or reducing power of a solution, with a scale from 0 to 42.

Your benefits

• Simultaneous measurement of pH, ORP, and rH value (in rH mode).
• Platinum electrode for measuring reference impedance.
• Low-maintenance and robust with a large PTFE ring junction.
• Can be used at pressures up to 17 bar (absolute).
• Process glass suitable for very alkaline applications.
• Long service life due to poison-resistant reference with ion trap.
• Integrated NTC 30K temperature sensor for temperature compensation.
• Glass breakage and blockage detection by measuring glass membrane resistance and reference impedance.
• Memosens technology provides:
  • Maximum process safety via non-contact, inductive signal transmission.
  • Data security through digital data transmission.
  • Ease of use with sensor data saved in the sensor.
  • Predictive maintenance by recording sensor load data.

Input

Measured variable

• pH value
• ORP
• rH value
• Temperature

Measuring range

• ORP: –1500 to 1500 mV
• Application A:
  • pH: 1 to 12
  • Temperature: –15 to 80 °C (5 to 176 °F)
• Application B:
  • pH: 0 to 14
  • Temperature: 0 to 135 °C (32 to 275 °F)

Process limits

Process temperature range

• Application A: –15 to 80 °C (5 to 176 °F)
• Application B: 0 to 135 °C (32 to 275 °F)

Process pressure range

• Applications A and B: 0.8 to 17 bar (11.6 to 246.5 psi) absolute

Conductivity

• Reference system TA: Minimum 50 μS/cm (minimized flow; pressure and temperature must remain constant)

Mechanical construction

Dimensions

• Installed lengths available: 120 mm, 225 mm, 360 mm, 425 mm.
• Sensor shaft diameter: Ø 11.9 mm (0.47 in).

Weight

• 120 mm installed length: 40 g (1.4 oz)
• 225 mm installed length: 60 g (2.1 oz)
• 360 mm installed length: 90 g (3.2 oz)
• 425 mm installed length: 100 g (3.5 oz)

Materials

• Sensor shaft: Glass
• pH membrane glass: Type A, B
• Metal lead: Ag/AgCl
• Junction: Ring-shaped PTFE
• ORP measuring element: Platinum
• 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

Environment

Ambient temperature range

• Not specified below 0 °C (32 °F) due to risk of frost damage.

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)

• Interference emission and interference immunity as per EN 61326-1:2013, EN 61326-2-3:2013, NAMUR NE21:2017.

Certificates and approvals

• CE mark
• Ex approvals: ATEX, IECEx, NEPSI, CSA C/US, Japan Ex, INMETRO (Zone 0, Zone 1, Zone 2)
• TÜV certificate for Memosens plug-in head (16 bar relative pressure resistance)
• EAC

Disclaimer

This data sheet was extracted from a datasheet for the Endress+Hauser Memosens CPS16E. The 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