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Digital conductivity sensor Indumax CLS50D

Memosens toroidal conductivity sensor for chemical applications

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Digital conductivity sensor Indumax CLS50D

Memosens toroidal conductivity sensor for chemical applications

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Benefits

  • High durability and chemical resistance even under harsh conditions
  • Dirt-repellent materials and large sensor opening avoid soiling
  • Wide temperature range and highly resistant materials make the sensor suitable for virtual any application
  • Reliable values thanks to active connection monitoring
  • Easy wiring over long distances without impact on the measurement accuracy
  • Logging of sensor-specific data for easy traceability
  • Approved for hazardous area use

Integrated technologies

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Liquiline: cutting-edge transmitter platform
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Digital conductivity sensor Indumax CLS50D

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Manufacturer's warranty

Engineered for confidence

Our instruments are designed for long‑lasting performance, precise measurement, and dependable operation in demanding industrial environments. Each product includes a standard manufacturer’s warranty that reflects our commitment to quality and to the trust you place in our solutions.

Should a warranty case occur, the device will be assessed and the applicable remedy will be provided in line with the warranty terms – helping ensure a reliable and efficient resolution and supporting continued operation of your measurement point.

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The manufacturer's warranty and extended warranty are subject to specific conditions. For full details, please refer to the locally applicable General Terms and Conditions (GTC), which can be found on the respective country page of our website.

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Product information

CLS50D is a conductivity sensor designed for harsh and aggressive media in the chemical industry.
Digital toroidal conductivity sensor
Specifications
Measuring / Application task Conductivity
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Description

Indumax CLS50D is a digital inductive conductivity sensor for standard, hazardous and high-temperature applications. Benefit from high chemical resistance and long durability thanks to robust materials (PFA, PEEK). Moreover, it is insensitive to soiling and performs reliable and repeatable even in harsh and aggressive media. Thanks to Memosens, CLS50D combines maximum process and data integrity with simple operation. It resists corrosion and moisture and facilitates predictive maintenance.

Field of application

Indumax CLS50D measures toroidal conductivity in:

  • Chemicals: - Concentration measurement of acids and bases - Quality monitoring of chemical products in tanks and pipes
  • Food & Beverages: - Phase separation of product/product mixtures in pipe systems
  • Life Sciences: - Phase separation of product/product mixtures in pipe systems
  • Wastewater industry: - Inlet monitoring

With its international explosion protection approvals, such as ATEX, FM, CSA, NEPSI, it is suitable for hazardous areas.

Benefits
  • High durability and chemical resistance even under harsh conditions
  • Dirt-repellent materials and large sensor opening avoid soiling
  • Wide temperature range and highly resistant materials make the sensor suitable for virtual any application
  • Reliable values thanks to active connection monitoring
  • Easy wiring over long distances without impact on the measurement accuracy
  • Logging of sensor-specific data for easy traceability
  • Approved for hazardous area use
Downloads
Most downloaded
Technical Information (TI)
TI Indumax CLS50D/CLS50 Inductive conductivity sensor for standard, Ex and high-temperature applications
English version - 01/2026
Download
Operating Instruction (BA)
BA Indumax CLS50D/CLS50 Inductive conductivity sensor for standard, Ex and high-temperature applications
English version - 04/2025
Download
Ex Safety Instruction (XA)
XA Indumax CLS50D Inductive conductivity sensor for standard, Ex and high-temperature
applications
JPN Ex ia IIC T4 Ga
English version - 10/2023
Download
The CAD Drawings will be available after the configuration.
All downloads
263 Downloads
Technical Information (TI)
Most downloaded
TI Indumax CLS50D/CLS50 Inductive conductivity sensor for standard, Ex and high-temperature applications
English version - 01/2026
Download
Operating Instruction (BA)
Most downloaded
BA Indumax CLS50D/CLS50 Inductive conductivity sensor for standard, Ex and high-temperature applications
English version - 04/2025
Download
Ex Safety Instruction (XA)
XA Indumax CLS50D Inductive conductivity sensor for standard, Ex and high-temperature
applications
JPN Ex ia IIC T4 Ga
English version - 10/2023
Download
Ex Safety Instruction (XA)
Indumax CLS50D, CLS50 FM IS/NI Cl.I Div. 1/2 GP A, B, C and D
Safety instructions for electrical apparatus in explosion-hazardous
areas
English version - 03/2022
Download
Ex Safety Instruction (XA)
XA Indumax CLS50D, CLS50 Inductive conductivity sensor for standard, Ex and high-temperature
applications
NEPSI Ex ia IIC T4/T6 Ga
English version - 08/2023
Download
Ex Safety Instruction (XA)
CLS50D, CLS50, CLS54, CLS15D, CLS16D, CLS21D, CLS82D Supplement to: BA00182C, BA01591C, BA01147C, BA01326C
Safety instructions for electrical apparatus in explosion-hazardous
areas
UK II 1G Ex ia IIC T3/T4/T6 Ga
English version - 01/2022
Download
Ex Safety Instruction (XA)
XA Indumax CLS50D Inductive conductivity sensor for standard, Ex and high-temperature
applications
KOR Ex ia IIC T4/T6 Ga
English version - 07/2024
Download
Ex Safety Instruction (XA)
XA Indumax CLS50D, CLS50 Inductive conductivity sensor for standard, Ex and high-temperature
applications
INMETRO Ex ia IIC T4/T6 Ga
English version - 07/2024
Download
Ex Safety Instruction (XA)
XA CLS50D, CLS50, CLS54 Safety instructions for electrical equipment for explosion-hazardous areas
EAC Ex, 0Ex ia IIC T6/T4 Ga X
Supplement to:
BA00182C, BA01591C
English version - 01/2026
Download
Ex Safety Instruction (XA)
XA Indumax CLS50D, CLS50, CLS54 CSA IS/NI Cl.I Div. 1/2 GP A, B, C and D
Safety instructions for electrical apparatus in explosion-hazardous areas
English version - 02/2026
Download
Ex Safety Instruction (XA)
XA Indumax CLS50D, CLS50 Inductive conductivity sensor for standard, Ex and high-temperature
applications
ATEX / NEPSI Ex ic IIC T3 T4/T6 Gc
English version - 09/2023
Download
Ex Safety Instruction (XA)
XA Indumax CLS50D, CLS50 ATEX II 1G Ex ia IIC T4/T6 Ga,
IECEx ia IIC T4/T6 Ga (CLS50D only)
Safety instructions for electrical equipment for explosion-hazardous areas
English version - 11/2025
Download
Special Documentation (SD)
Special documentation Liquiline CM14 conductivity kit 3 For conductivity measurement in wastewater
English version - 07/2012
Download
Special Documentation (SD)
Special Documentation CLS50D, CLS54D Installation advice for Indumax CLS50D and CLS54D
English version - 10/2013
Download
Fields of Activities (FA)
Sensors, transmitters, compact devices and assemblies Experts in Liquid Analysis
English version - 02/2026
Download
Fields of Activities (FA)
水質分析の専門知識 センサからすべてを備えた
ターンキーソリューションまで
Japanese version - 06/2025
Download
Fields of Activities (FA)
Esperti nell’analisi dei liquidi Dai sensori singoli a soluzioni
complete “chiavi in mano”
Italian version - 01/2017
Download
Fields of Activities (FA)
Kompetenz in der Flüssigkeitsanalyse Vom Sensor bis zur schlüsselfertigen Komplettlösung
German version - 09/2022
Download
Fields of Activities (FA)
Catálogo Portfolio Analítica Desde sensores hasta soluciones completas
Spanish version - 01/2017
Download
Fields of Activities (FA)
Sıvı analizinde uzmanlık Sensörlerden komple anahtar teslim çözümlere
Turkish version - 11/2023
Download
Fields of Activities (FA)
Expertise in liquid analysis From sensors to complete turnkey solutions
English version - 09/2022
Download
Fields of Activities (FA)
Jistota v analýze kapalin Od senzorů po kompletní dodávku na klíč
Czech version - 01/2017
Download
Fields of Activities (FA)
Sensoren, Messumformer, Kompaktgeräte and Armaturen Kompetenz in der Flüssigkeitsanalyse
German version - 02/2026
Download
Fields of Activities (FA)
Sensori, trasmettitori, dispositivi compatti e armature Sensori, trasmettitori,
dispositivi compatti e armature
Esperti in materia di analisi dei
liquidi
Italian version - 06/2026
Download

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Spare parts and accessories

further parts
further parts

Kit CLS50 >20081001: CHEMRAZ O-rings

further parts
further parts
Order code 71086368
Drawing number 250
further parts
further parts

Kit CLS50 >20081001: VITON O-rings

further parts
further parts
Order code 71086369
Drawing number 260
further parts
further parts

Kit CLS50 DN50 >20081001: PTFE disk

further parts
further parts
Order code 71086372
Drawing number 270
further parts
further parts

Kit CLS50 ANSI+JIS >20081001: PTFE disk

further parts
further parts
Order code 71086374
Spare parts and accessories
CLS50D is a conductivity sensor designed for harsh and aggressive media in the chemical industry.
Digital toroidal conductivity sensor

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CLS50D is a conductivity sensor designed for harsh and aggressive media in the chemical industry.
Digital toroidal conductivity sensor
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Spare parts and accessories

further parts
further parts

Kit CLS50 >20081001: CHEMRAZ O-rings

further parts
further parts
Order code 71086368
Drawing number 250
further parts
further parts

Kit CLS50 >20081001: VITON O-rings

further parts
further parts
Order code 71086369
Drawing number 260
further parts
further parts

Kit CLS50 DN50 >20081001: PTFE disk

further parts
further parts
Order code 71086372
Drawing number 270
further parts
further parts

Kit CLS50 ANSI+JIS >20081001: PTFE disk

further parts
further parts
Order code 71086374
Spare parts and accessories

Selection of compatible products

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