Condumax CLS12

Summary

Product identification

• Product Name: Condumax CLS12
• Description: Conductivity sensor for high-temperature applications
• Document ID: TI00082C/07/EN/13.21-00
• Document Date: 2021-10-31

Application

The Condumax CLS12 is a 2-electrode sensor designed for measuring conductivity in water or steam circuits, particularly in power and energy industries. It is suitable for:

• Condensate monitoring
• Boiler feedwater monitoring
• Boiler blowdown monitoring

This sensor is optimized for low conductivity applications with high temperatures and pressures. Versions with explosion protection (ATEX, FM, CSA) are available for hazardous areas.

Function and system design

Measuring principle

The sensor employs a conductive measurement principle using two electrodes immersed in the medium. An alternating voltage is applied, generating a current flow. Conductivity (κ) is calculated using Ohm's law and the cell constant (k), which is dependent on sensor geometry.

Measuring system

A complete system comprises:

• Condumax CLS12 sensor
• A transmitter (e.g., Liquiline M CM42)
• A measuring cable (e.g., CYK71 for analog sensors)

Temperature compensation

An integrated Pt 100 temperature sensor within the inner electrode allows for precise temperature compensation by the connected transmitter, benefiting from the sensor's rapid thermal response.

Input

Measured variables

• Conductivity
• Temperature

Measuring ranges

• Conductivity (relative to water at 25 °C (77 °F)):
  • CLS12 -A: 0.04 to 20 μS/cm
  • CLS12 -B: 0.10 to 200 μS/cm
• Temperature:
  • CLS12: -20 to 160 °C (-4 to 320 °F)

Electrical

• Connection: Via fixed cable or measuring cable CYK71 with shield. Wiring diagram is provided in the transmitter's operating instructions.

Mechanical construction

Design

• Coaxial measuring electrodes for fast medium throughput and accuracy.
• Components include: Terminal head, cable connection, sealing surface, electrodes, threaded connection, nameplate.

Dimensions

• Overall length: 223 mm (8.78 in)
• Diameter: 25 mm (0.98 in)
• Threaded connection size: G1 / NPT 1"
• Minimum immersion depth: ≥50 mm (1.97 in)

Weight

• Approximately 1.4 kg (3.1 lbs) depending on version.

Materials (in contact with medium)

• Electrodes: Stainless steel 1.4571 (AISI 316Ti)
• Process connection: Stainless steel 1.4571 (AISI 316Ti)
• Terminal head: Die-cast aluminum
• Insulator body: EPDM, PEEK

Cell constant

• CLS12 -A: k = 0.01 cm⁻¹
• CLS12 -B: k = 0.1 cm⁻¹

Temperature sensor

• Pt 100 (class B as per IEC 60751)

Process

Process temperature

• -20 to 160 ˚C (-4 to 320 ˚F)

Process pressure

• Without flow assembly CLA751:
  • Up to 100 °C (212 °F): 1 to 41 bar (15 to 595 psi), absolute
  • Up to 160 °C (320 °F): 1 to 7 bar (15 to 102 psi), absolute
• In flow assembly CLA751: 1 to 13 bar (15 to 185 psi), absolute

Environment

Ambient temperature range

• –20 to 60 °C (–4 to 140 °F)

Storage temperature

• -25 to +80 °C (-10 to +180 °F)

Degree of protection

• IP67

Accessories

Assemblies

• Flow assembly CLA751: For G1 thread sensors, max. temp. 160 °C (320 °F), max. pressure 12 bar (174 psi).
• Flow assembly CLA752: For G1 thread sensors, max. temp. 90 °C (194 °F), max. pressure 6 bar (87 psi).

Measuring cable

• CYK71: Unterminated cable for analog sensors and cable extension, sold by the meter.

Junction boxes

• VBM: For cable extension, IP 65, aluminum.
• VBM-Ex: For hazardous areas, IP 65 (NEMA 4X), aluminum.

Calibration solutions

• CLY11: Precision conductivity calibration solutions (e.g., 74 μS/cm, 149.6 μS/cm).
• Conducal CLY421: Calibration set for ultrapure water applications.

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Disclaimer: This extracted summary may omit figures, footnotes, or revisions from the original PDF datasheet. Contractual data must be confirmed against the specific OEM PDF revision used for the project.

Official datasheet (PDF)

Lenntech datasheet mirror