Inductive Conductivity Measurement for Demanding Processes
The Indumax CLS50 uses an inductive or toroidal conductivity measuring principle, rather than direct-contact electrodes. This makes it particularly suitable for applications involving aggressive, contaminated or fouling-prone process media.
Because the measuring cell does not rely on exposed metallic electrodes in the same way as a conventional contacting conductivity sensor, the CLS50 can provide stable measurement in applications where electrode fouling or aggressive chemicals may be a concern. Endress+Hauser specifically positions it for chemical and other demanding industrial applications.
Wide Measuring Range
One of the major advantages of the CLS50 is its exceptionally broad conductivity range of 2 μS/cm to 2000 mS/cm.
This allows a single sensor family to cover applications ranging from relatively low-conductivity liquids to highly conductive chemical solutions, reducing the need to use different sensor technologies for every process range.
Designed for Aggressive Chemical Media
The CLS50 is designed with chemically resistant materials including PFA and PEEK. These materials provide resistance to aggressive process media and support long-term operation in demanding chemical environments.
This makes the sensor particularly relevant for acid and alkali concentration measurement and chemical-product quality monitoring.
Resistant to Soiling
The sensor construction is designed to be relatively resistant to contamination. Endress+Hauser highlights the dirt-repellent materials and large sensor opening, which help reduce the tendency for process material to accumulate around the measuring area.
This characteristic is useful in processes where deposits or contamination can otherwise affect conductivity measurement.
High-Temperature Capability
The CLS50 can be configured for high-temperature process conditions. With the PEEK version, the maximum process temperature reaches 180°C, while the PFA version is specified up to 125°C.
This allows the sensor to be selected according to the chemical resistance and temperature requirements of the application.
Pressure Capability for Industrial Processes
The specified maximum process pressure is 20 bar for the PEEK version and 16 bar for the PFA version, depending on process temperature and configuration.
This pressure capability makes the CLS50 suitable for a range of pressurized process installations rather than only open or low-pressure tanks.
Suitable for Chemical Concentration Measurement
The CLS50 can be used for concentration measurement of acids and bases, making it particularly useful in chemical processing.
It can also be used to monitor the quality of chemical products in tanks and pipelines, where conductivity provides an indication of product concentration or process consistency.
Suitable for Food & Beverage Applications
Although the CLS50 is strongly associated with chemical applications, Endress+Hauser also lists food & beverage applications.
One example is phase separation of product/product mixtures in pipe systems, where changes in conductivity can help distinguish different process media.
Wastewater Monitoring
The CLS50 is also suitable for selected wastewater applications, including inlet monitoring.
Its resistance to contamination and wide conductivity range can be useful where the process medium is less clean than the water typically measured by conventional low-conductivity sensors.
Suitable for Hazardous Areas
The CLS50 is available with international explosion-protection approvals, including ATEX, FM, CSA and NEPSI, depending on configuration.
This allows applicable versions of the sensor to be used in hazardous-area installations where the selected configuration meets the required certification.
Integrated Temperature Measurement
The CLS50 includes an integrated Pt100 temperature sensor. This allows conductivity measurement to be evaluated together with process temperature, which is important because conductivity changes with temperature.
Robust Design for Long Operating Life
The combination of inductive measurement, chemically resistant construction and contamination-resistant sensor geometry gives the CLS50 a robust design for long-term operation in demanding industrial environments.
Endress+Hauser specifically highlights its high durability, chemical resistance and long operating life.
Key Features
Product type: Analog inductive conductivity sensor
Measuring principle: Inductive / toroidal
Measuring range 2 μS/cm to 2000 mS/cm
Designed for chemical and demanding industrial applications
High chemical resistance
PEEK or PFA sensor materials
Resistant to soiling
Large sensor opening
Process temperature up to 180°C with PEEK
Process temperature up to 125°C with PFA
Process pressure up to 20 bar with PEEK
Process pressure up to 16 bar with PFA
Integrated Pt100 temperature sensor
Fixed cable connection
NPT 1", DN50 and ANSI/JIS process connection options
IP67 protection
ATEX, FM, CSA and NEPSI approvals available depending on configuration
Suitable for hazardous-area applications
Designed for long operating life
Typical Applications
Acid and Alkali Concentration Measurement
The CLS50 can be used for conductivity-based concentration measurement of acids and bases, making it particularly suitable for chemical processing applications.
Chemical Product Quality Monitoring
Conductivity can be used to monitor the quality and consistency of chemical products in tanks and pipelines. The CLS50's broad measurement range allows it to cover a wide variety of chemical media.
Chemical Processing
The sensor is designed for demanding chemical applications where aggressive media, contamination and elevated process temperatures can make conventional conductivity sensors difficult to apply.
Food & Beverage Phase Separation
The CLS50 can be used for phase separation of product/product mixtures in pipe systems, where different liquids have distinguishable conductivity characteristics.
Wastewater Inlet Monitoring
The sensor can be applied to wastewater inlet monitoring where the process medium may contain contaminants and conductivity can vary over a broad range.
High-Temperature Conductivity Measurement
For processes involving elevated temperatures, the appropriate CLS50 material configuration can support temperatures up to 180°C, making it suitable for demanding thermal conditions.
Hazardous-Area Process Measurement
With applicable explosion-protection configurations, the CLS50 can be integrated into conductivity measurement systems in hazardous industrial environments.
FAQ
What is the Endress+Hauser CLS50?
The Indumax CLS50 is an analog inductive conductivity sensor designed for chemical, high-temperature and other demanding industrial applications.
What does the CLS50 measure?
The CLS50 measures the electrical conductivity of liquids using an inductive/toroidal measuring principle. Its measuring range is 2 μS/cm to 2000 mS/cm.
Is the CLS50 a contacting conductivity sensor?
No. The CLS50 uses an inductive conductivity measuring principle, rather than a conventional contacting two-electrode or four-electrode cell.
Why use inductive conductivity measurement?
Inductive measurement is useful for applications involving aggressive or contaminated media because the measuring principle does not rely on conventional exposed conductivity electrodes in direct contact with the process medium.
What is the maximum temperature of the CLS50?
The maximum process temperature is 180°C for the PEEK version and 125°C for the PFA version, according to the current Endress+Hauser specifications.
What is the maximum process pressure?
The maximum specified process pressure is 20 bar for PEEK and 16 bar for PFA, depending on process conditions and configuration.
What materials are available?
The CLS50 uses chemically resistant PFA or PEEK materials, depending on the selected configuration and application requirements.
Can the CLS50 measure acid and alkali concentration?
Yes. Endress+Hauser specifically lists concentration measurement of acids and bases as an application for the CLS50.
Can the CLS50 be used in wastewater?
Yes. Endress+Hauser lists wastewater inlet monitoring among its applications.
Can the CLS50 be used in hazardous areas?
Yes. Depending on the selected configuration, approvals such as ATEX, FM, CSA and NEPSI are available. The exact certification should be checked against the order code.
Does the CLS50 have temperature measurement?
Yes. The sensor includes an integrated Pt100 temperature sensor.
What is the difference between CLS50 and CLS50D?
The CLS50 is the analog version of the Indumax sensor family. The CLS50D is the digital version designed for Endress+Hauser's Memosens platform. The exact transmitter compatibility should therefore be checked when selecting between the two versions.
