Manual Retractable Assembly for Process Sensors
The Cleanfit CPA450 is an installation assembly designed to accommodate 12 mm sensors for pH, ORP/redox and oxygen measurement. It allows the sensor to be manually moved between the measuring and service positions while maintaining separation from the process when the sensor is retracted.
The assembly is particularly useful when regular sensor maintenance is required but stopping the process or draining the vessel is undesirable.
Designed for Thick-Walled Tanks and Large Pipes
The CPA450 is intended for installation in thick-walled tanks and large pipes, where a longer insertion depth may be required.
Its variable immersion depth can reach 700 mm, providing flexibility for different vessel and piping geometries.
Reliable Process Isolation with Ball Valve
A key feature of the CPA450 is its stainless steel ball valve, which separates the retracted sensor from the process.
This arrangement allows the sensor to be removed for servicing while the process remains isolated, helping reduce maintenance-related downtime.
Maintenance Without Process Interruption
The retractable design allows the electrode to be removed from the process for cleaning, calibration or replacement without requiring the process to be stopped or the tank to be emptied.
This can be particularly useful for continuous industrial processes where access to the measuring point is required during operation.
Suitable for pH, ORP and Oxygen Measurement
The CPA450 is designed for 12 mm electrodes and sensors used for pH, ORP/redox and oxygen measurement.
Endress+Hauser's technical documentation identifies the assembly for 12 mm sensors used in pH, redox and oxygen measurement.
Flexible Immersion Tube Materials
Depending on configuration, the immersion tube is available in stainless steel 1.4404, Alloy C22 or titanium 3.7035.
These material options allow the assembly to be matched to different process media and chemical conditions.
Multiple O-Ring Options
The CPA450 can be configured with different sealing materials, including EPDM, Viton or Kalrez.
The appropriate seal material should be selected according to the process medium and operating conditions.
Rinse Chamber Connection
The assembly includes a G1/4 rinse chamber connection, providing a connection point for cleaning or rinsing arrangements where required by the application.
Suitable for Demanding Industrial Processes
The CPA450 is designed for applications in water and wastewater treatment, chemical processing, pulp and paper and power generation, as well as processes involving fibrous or coating media.
Key Features
- Product type: Manual retractable assembly
- Designed for 12 mm pH, ORP/redox and oxygen sensors
- Manual sensor insertion and retraction
- Suitable for open and closed tanks and piping
- Immersion depth up to 700 mm
- Stainless steel ball valve for process isolation
- Sensor maintenance without process interruption
- No need to empty the tank for sensor servicing
- Rinse chamber connection G1/4
- Immersion tube materials:Stainless steel 1.4404Alloy C22Titanium 3.7035
- O-ring options: EPDM, Viton or Kalrez
- Process temperature -15 to +130°C
- Process pressure up to 12 bar at 100°C
- Flexible process connection options
- Suitable for thick-walled tanks and large pipes
- Designed for water and wastewater, chemical, pulp and paper and power applications
Typical Applications
Water and Wastewater Treatment
The CPA450 can be used for pH, ORP or oxygen measurement in water and wastewater treatment systems where sensors require regular cleaning, calibration or replacement.
Its retractable design allows maintenance access while keeping the process isolated.
Chemical Processing
In chemical processes, sensor assemblies may need frequent maintenance because of demanding process media. The CPA450 provides a retractable installation arrangement with different immersion-tube and sealing materials.
Endress+Hauser lists the chemical industry among the primary application areas for the CPA450.
Pulp and Paper
The CPA450 is suitable for processes involving fibrous or coating media, making it applicable to pulp and paper installations where sensor fouling and maintenance access can be concerns.
Power Plants
The assembly can be used for process and water-quality measurement applications in power plants, including installations where sensor servicing needs to be performed without unnecessary process interruption.
Large Pipes
The CPA450 is designed for large-pipe installations where a longer insertion depth is required. Its immersion depth can be configured up to 700 mm.
Thick-Walled Tanks
The assembly is specifically suited to thick-walled tanks where conventional short sensor installations may not provide sufficient insertion depth.
Processes with Coating or Fibrous Media
For media that tend to form coatings or contain fibers, regular sensor cleaning may be necessary. The retractable design provides access to the sensor without requiring the vessel to be emptied.
FAQ
What is the Endress+Hauser Cleanfit CPA450?
The CPA450 is a manual retractable assembly for installing 12 mm pH, ORP/redox and oxygen sensors in tanks and pipes. It is an installation assembly rather than a sensor or transmitter.
What sensors can be installed in the CPA450?
The assembly is designed for 12 mm sensors, including sensors used for pH, ORP/redox and oxygen measurement.
What is the maximum immersion depth?
The maximum variable immersion depth is 700 mm.
Can the sensor be serviced without stopping the process?
Yes. The retractable design and integrated ball valve allow the sensor to be retracted and isolated from the process for cleaning, calibration or replacement without interrupting the process or emptying the tank.
What is the process temperature range?
The specified process temperature range is -15 to +130°C.
What is the maximum process pressure?
The specified maximum process pressure is 12 bar at 100°C. The permissible pressure varies with temperature and the selected configuration.
What materials are available for the immersion tube?
Depending on configuration, the immersion tube can be supplied in stainless steel 1.4404, Alloy C22 or titanium 3.7035.
Which sealing materials are available?
The CPA450 can be configured with EPDM, Viton or Kalrez O-rings. The appropriate material depends on the process conditions and medium compatibility.
Does the CPA450 have a rinse connection?
Yes. The assembly includes a G1/4 rinse chamber connection for applicable cleaning or rinsing arrangements.
Where is the CPA450 typically used?
Endress+Hauser lists water and wastewater, chemical, pulp and paper, and power industries as application areas. It is also intended for fibrous or coating media and installation in thick-walled tanks or large pipes.
Is the CPA450 a pH sensor?
No. The CPA450 is the mechanical retractable assembly used to install and service a compatible 12 mm sensor. The pH, ORP or oxygen measurement is performed by the separately selected sensor.
