Digital Inductive Conductivity Measurement
The CLS50D uses the inductive or toroidal conductivity measuring principle, allowing conductivity measurement without direct electrical contact between the electrodes and the process medium. This makes the sensor particularly useful for aggressive or corrosive liquids where conventional contacting conductivity sensors may be less suitable.
The sensor covers a wide conductivity range of 2 μS/cm to 2000 mS/cm, allowing one sensor family to handle a broad variety of industrial liquids.
Memosens Technology for Digital Measurement
Unlike the analog CLS50, the CLS50D uses Memosens digital sensor technology. Measurement data and sensor information can be transferred digitally to a compatible transmitter, supporting process and data integrity while simplifying sensor handling and maintenance.
Memosens also provides a practical way to manage sensor information and supports maintenance approaches such as sensor diagnostics and predictive maintenance. Endress+Hauser specifically highlights the CLS50D's resistance to corrosion and moisture together with the benefits of Memosens technology.
Designed for Aggressive Chemical Media
The CLS50D is designed for applications where the sensor may be exposed to aggressive process liquids. The sensor uses PEEK or PFA as its resistant construction materials, helping provide durability in demanding chemical environments.
Because the sensor coating isolates the measuring structure from direct contact with the medium, the design is well suited to applications involving corrosive liquids and challenging process conditions.
Wide Conductivity Measuring Range
With a measuring range of 2 μS/cm to 2000 mS/cm, the CLS50D can cover both relatively low and very high conductivity applications.
This broad range makes it useful for applications such as chemical concentration monitoring and quality control where conductivity can change significantly with process conditions or product composition.
Resistant to Soiling
The sensor design is intended to remain reliable in process media where contamination or deposits may affect measurement performance. Endress+Hauser describes the CLS50D as insensitive to soiling and suitable for reliable, repeatable measurement in harsh and aggressive media.
This makes it particularly relevant to industrial processes where maintaining stable conductivity measurement over time is important.
High-Temperature and Pressure Capability
The allowable process temperature and pressure depend on the selected sensor material.
The PEEK version supports temperatures up to 125°C and pressures up to 21 bar, while the PFA version supports temperatures up to 110°C and pressures up to 17 bar. These values should always be checked against the exact sensor configuration and installation conditions.
Suitable for Chemical Concentration Measurement
Conductivity can be used as an indicator of concentration for certain chemical solutions. The CLS50D is therefore suitable for applications such as acid and base concentration measurement and monitoring the quality of chemical products in tanks and pipelines.
Food & Beverage and Life Sciences Applications
The CLS50D can also be used for phase separation of different products or product mixtures in pipe systems. Endress+Hauser lists both Food & Beverage and Life Sciences applications for this purpose.
Wastewater Monitoring
In wastewater applications, the CLS50D can be used for inlet monitoring, where conductivity provides useful information about incoming water conditions and process changes.
Its non-contact inductive measuring principle and resistant construction can be useful in industrial water environments where the process medium may contain contaminants or aggressive components.
Suitable for Hazardous Areas
Depending on the selected configuration, the CLS50D is available with international explosion-protection approvals including ATEX, IECEx, NEPSI, FM, CSA, TIIS and EAC. The exact approval must be confirmed against the selected order code.
Integrated Temperature Measurement
The CLS50D includes an integrated Pt1000 temperature sensor, allowing temperature information to be available as part of the measurement arrangement.
Robust Industrial Construction
The sensor is available with process connections including NPT 1", DN50, ANSI and JIS, with a fixed cable connection. Endress+Hauser specifies IP68 / NEMA Type 6 protection for the sensor.
Key Features
- Digital inductive conductivity sensor
- Memosens digital technology
- Measuring range 2 μS/cm to 2000 mS/cm
- Toroidal / inductive conductivity measurement
- Suitable for aggressive and corrosive media
- PEEK or PFA construction
- Resistant to soiling
- PEEK: up to 125°C / 21 bar
- PFA: up to 110°C / 17 bar
- Integrated Pt1000 temperature sensor
- IP68 / NEMA Type 6
- NPT 1", DN50, ANSI and JIS process connections
- Fixed cable connection
- Calibration certification of the cell constant available
- ATEX, IECEx, NEPSI, FM, CSA, TIIS and EAC approvals depending on configuration
- Designed for standard, hazardous-area and demanding industrial applications
Typical Applications
Chemical Concentration Measurement
Measurement of conductivity can be used to monitor the concentration of selected acids, bases and other chemical solutions in industrial processes.
Chemical Product Quality Monitoring
The CLS50D can be installed in tanks and pipelines to monitor conductivity changes associated with chemical product quality and process conditions.
Phase Separation
In Food & Beverage and Life Sciences processes, conductivity measurement can help identify changes between different products or product mixtures during phase separation in pipe systems.
Wastewater Inlet Monitoring
The CLS50D can be used for conductivity monitoring at wastewater inlets, providing information about incoming process conditions.
Aggressive Industrial Liquids
Its inductive measuring principle and PFA/PEEK construction make the CLS50D suitable for industrial liquids where chemical resistance and durability are important.
Hazardous-Area Process Measurement
Applicable configurations with explosion-protection approvals can be used for conductivity measurement in hazardous areas, subject to the requirements of the complete measuring point.
FAQ
What is the Endress+Hauser CLS50D?
The CLS50D is a digital inductive conductivity sensor designed primarily for chemical and demanding industrial applications. It uses Memosens technology and a toroidal measuring principle.
What is the difference between CLS50 and CLS50D?
The main distinction is the sensor interface. CLS50 is the analog version, while CLS50D is the digital Memosens version. The two models belong to the same Indumax sensor family, but their electrical interfaces and associated transmitter arrangements differ.
What is the measuring range of the CLS50D?
The CLS50D has a conductivity measuring range of 2 μS/cm to 2000 mS/cm.
Is the CLS50D suitable for corrosive liquids?
Yes. The CLS50D is specifically designed for demanding chemical applications and uses PFA or PEEK materials for high chemical resistance. Endress+Hauser also describes the sensor as suitable for harsh and aggressive media.
What is the maximum process temperature?
For the PEEK version, the maximum process temperature is 125°C. For the PFA version, it is 110°C.
What is the maximum process pressure?
The PEEK version supports up to 21 bar, while the PFA version supports up to 17 bar. The exact limit depends on the selected configuration.
Does the CLS50D measure temperature?
Yes. The CLS50D has an integrated Pt1000 temperature sensor.
Can the CLS50D be used in hazardous areas?
Yes. Depending on configuration, Endress+Hauser lists approvals including ATEX, IECEx, NEPSI, FM, CSA, TIIS and EAC. The exact certification should be checked against the selected order code.
Is the CLS50D suitable for wastewater?
Yes. Endress+Hauser lists wastewater inlet monitoring among the applications for the CLS50D.
Can the CLS50D be used for acid and alkali concentration measurement?
Yes. Endress+Hauser specifically lists acid and base concentration measurement as a chemical-industry application for the CLS50D.
What type of conductivity measurement does the CLS50D use?
The CLS50D uses inductive, or toroidal, conductivity measurement. The sensor does not rely on direct electrical contact between conventional electrodes and the process medium.
