The Endress+Hauser Group

Media center

Endress+Hauser Events

Your career with Endress+Hauser

Support close to you

Online Shop

Enter your personal login to access the Online Shop and place your order 24/7. Additionally, you can check your product prices and delivery times, or you may request a quote.

Online Shop

E-direct Shop

E-direct compliments our traditional offering by providing you with a quick, effective way to purchase easy-to-configure, entry-level instrumentation.

E-direct Shop

Analog conductivity sensor
Indumax CLS50

Toroidal conductivity sensor for chemical applications

  • ©Endress+Hauser
  • ©Endress+Hauser
  • The conductivity of a liquid can be measured using the conductive or toroidal measuring principles. This video shows what it is about and how these measuring principles work.

Indumax CLS50 is an 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. The wide temperature range of -20 to +180 °C leaves nothing to be desired.


  • 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

  • Robust design for outstanding long operating life

  • Approved for hazardous area use

Field of application

Indumax CLS50 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

  • Wastewater industry:
    - Inlet monitoring

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

Features and specifications

Documents / Manuals / Software

Accessories / Spare parts

Predecessor / Successor

Predecessor: CLS40, CLS41

Success stories


Endress+Hauser Inc.
2350 Endress Place Greenwood , IN 46143 United States
Tel.: 888-363-7377
Fax: 317-535-8498
Send email

Related news

Online Tools