Versatile Transmitter for Analog Conductivity Sensors
The Endress+Hauser Liquisys CLM253 is a compact field transmitter designed to work with analog conductivity sensors in non-hazardous areas.
It provides the signal processing, display, configuration and diagnostic functions required to turn conductivity sensor measurements into useful process information. The transmitter can be used for conductivity, resistivity and concentration measurement, making it suitable for a wide range of liquid analysis applications.
One Transmitter for Different Conductivity Applications
The CLM253 is designed as an all-purpose conductivity transmitter, allowing users to adapt the instrument to different measurement requirements.
Depending on the selected configuration, it can support:
Conductivity measurement
Resistivity measurement
Concentration measurement
Ultrapure water monitoring
Temperature-compensated measurement
This flexibility makes the CLM253 suitable for both general process monitoring and more specialized water quality applications.
Continuous Process and Sensor Checks
The CLM253 incorporates continuous monitoring functions to help identify abnormal measurement conditions.
The transmitter can perform process checks, sensor checks and calibration plausibility checks, helping operators distinguish between genuine process changes and potential measurement problems.
Configurable alarm functions can also be adapted to the requirements of the individual measuring point.
Simple Configuration and Operation
The CLM253 uses a straightforward user interface with a two-line display, making everyday configuration and operation relatively simple.
Calibration and measurement parameters can be accessed directly from the transmitter, while manual contact control provides convenient access during commissioning and maintenance.
This makes the transmitter practical for operators who need to configure or service conductivity measuring points directly in the field.
Modular Design for Application Flexibility
One of the main characteristics of the CLM253 is its modular hardware and software concept.
Users can select additional functions such as:
Relay functions
Fieldbus communication
Controller functions
Timer functions
Automatic cleaning functions
The modular concept also allows the transmitter to be adapted or upgraded according to changing measurement requirements.
Automatic Cleaning with Chemoclean
For applications where sensor fouling can affect measurement reliability, the CLM253 can be configured with an automatic cleaning function using Chemoclean.
Cleaning can be triggered by an alarm or limit switch, helping reduce manual cleaning requirements and maintain sensor performance during continuous operation.
Flexible Communication Options
The CLM253 supports several communication and output options for integration into plant control systems.
Depending on configuration, communication can include:
0/4–20 mA
HART
PROFIBUS DP
PROFIBUS PA
This allows the transmitter to be integrated into different automation architectures while retaining local display and operating functions.
Designed for Multiple Industries
The CLM253 can be used with analog conductivity sensors in a variety of industries and utility applications.
Endress+Hauser specifically lists applications in:
Chemical industry
Food & beverage
Life sciences
Power & energy
Water and wastewater
Primaries and metals
This broad application range is one reason the CLM253 is positioned as an all-purpose conductivity transmitter.
Compact Field Housing
The transmitter is housed in a PC/ABS field enclosure with IP65 ingress protection, making it suitable for direct field installation in appropriate non-hazardous industrial environments.
Its compact enclosure and integrated display provide a practical solution for conductivity measurement points where local access to the transmitter is required.
Key Features
One-channel conductivity transmitter for analog sensors
Suitable for conductivity, resistivity and concentration measurement
Designed for water, wastewater and industrial process applications
Continuous process and sensor monitoring
Calibration plausibility checking
Configurable alarm functions
0/4–20 mA output
HART communication
PROFIBUS DP/PA options
Two-line local display
Modular hardware and software design
Optional automatic cleaning with Chemoclean
Optional controller and timer functions
PC/ABS field housing
IP65 protection
Designed for non-hazardous areas
Typical Applications
Water and Wastewater
The CLM253 can be used for conductivity monitoring in water treatment and wastewater systems, including general process water quality monitoring and control.
Chemical Processing
Conductivity can provide useful information about process liquids and chemical concentrations. The CLM253 can be configured for conductivity or concentration measurement in suitable chemical applications.
Food and Beverage
The transmitter can be integrated into analog conductivity measuring points used for process and utility water monitoring in food and beverage production.
Life Sciences
The CLM253 can support conductivity and resistivity measurement in suitable water and process applications within life sciences facilities.
Power and Energy
The transmitter can be used for conductivity and resistivity monitoring in power-generation utilities and water treatment systems.
Primary and Metal Processing
Conductivity measurement can be applied to process and utility water systems in mining, metals and related industrial processes.
FAQ
What is the Endress+Hauser CLM253?
The CLM253 is a one-channel conductivity transmitter designed for use with analog conductivity sensors. It processes conductivity measurements and provides local display, outputs, communication and diagnostic functions.
What can the CLM253 measure?
Depending on configuration, the CLM253 supports conductivity, resistivity and concentration measurement, as well as ultrapure water monitoring according to applicable USP and EP requirements.
What sensors can be used with CLM253?
The CLM253 is designed for analog conductivity sensors. It is not a Memosens-only transmitter.
What communication options are available?
Depending on the selected configuration, the CLM253 supports 0/4–20 mA, HART, PROFIBUS DP and PROFIBUS PA.
Does the CLM253 support automatic sensor cleaning?
Yes. An automatic cleaning function using Chemoclean is available as an option and can be triggered by an alarm or limit switch.
Is the CLM253 suitable for hazardous areas?
The standard CLM253 is specified for non-hazardous areas and does not have Ex certification according to the current product information.
What type of housing does the CLM253 use?
The CLM253 uses a PC/ABS field housing with IP65 ingress protection.
