Memosens 31E

Summary

Product identification

Product Name: Memosens CPS31E Product Type: pH sensor for standard applications in drinking water and swimming pool water Technology: Memosens 2.0

Application

• Drinking water
• Swimming pool water
• pH compensation during the measurement of free chlorine

The sensor is approved for use in hazardous areas (Zone 0, Zone 1, and Zone 2) with ATEX, IECEx, CSA C/US, NEPSI, Japan Ex, and INMETRO certifications.

Operating limits

• Maximum pressure: 4 bar (58 psi) absolute
• Maximum temperature: 80 °C (176 °F)
• Process temperature range: –15 to 80 °C (5 to 176 °F)
• Process pressure range: 0.8 to 4 bar (11.6 to 58 psi) absolute

Feed water

• Conductivity (Reference system AB and SB): Minimum 100 μS/cm
• Conductivity (Reference system AC and SC): Minimum 50 μS/cm

Product water

• pH measuring range: 1 to 12
• Temperature measuring range: –15 to 80 °C (5 to 176 °F)

Electrical

• Technology: Memosens digital technology with inductive, non-contact signal transmission.
• Integrated temperature sensor: NTC 30K for temperature compensation.

Mechanical / hydraulic

• Reference system: Ag/AgCl with gel (3M KCl) or salt storage (KCl-saturated).
• Junctions: 1 or 3 ceramic junctions.
• Electrolyte: Very low ion depletion.
• Dimensions:
  • Installed length: 120 mm (4.72 in)
  • Diameter: Ø 11.9 mm (0.47 in)
  • Weight: 40 g (1.4 oz)
• Materials:
  • Sensor shaft: Glass
  • pH membrane glass: Type A
  • Metal lead: Ag/AgCl
  • O-ring: FKM
  • Process coupling: PPS fiber-glass reinforced
  • Plug-in head: Memosens plug-in head (pressure resistance 16 bar / 232 psi relative)
• Process connections: Pg 13.5
• Degree of protection: IP 68 (10 m (33 ft) water column, 25 °C (77 °F), 45 days, 1 M KCl)
• Installation orientation: Minimum 15° from the horizontal.
• Tightening torque: 3 Nm (2.21 lbf ft) (for Endress+Hauser assemblies).

Certificates and approvals

• CE marking
• Ex approvals: ATEX, IECEx, NEPSI, CSA C/US, Japan Ex, INMETRO (II 1G Ex ia IIC T4/T6 Ga or equivalent). Ex versions have an orange-red ring on the plug-in head.
• EAC conformity

Disclaimer

This summary is extracted from a datasheet and may not include all figures, footnotes, or revisions. Contractual data must be verified against the specific OEM PDF revision used for the project.

Official datasheet (PDF)

Lenntech datasheet mirror