A Durable Assembly for Demanding Tank Applications
The Dipfit CPA140 is designed for applications where conventional sensor installation can become difficult because of aggressive process media, sticky substances or suspended solid particles.
Rather than being a measuring sensor itself, the CPA140 provides the mechanical installation point for compatible pH or ORP electrodes and allows them to be positioned securely inside a closed process tank.
Designed for pH and ORP Sensors
The CPA140 is intended for use with pH or ORP sensors. Its construction accommodates up to three sensors, providing additional flexibility when several measurement or cleaning functions need to be integrated into the same tank installation.
The assembly uses 120 mm sensor mounting positions, making sensor compatibility an important consideration when selecting the complete measuring point.
Bayonet Lock for Easier Sensor Maintenance
A key feature of the CPA140 is its bayonet locking system.
The bayonet design allows the electrode holder to be installed and removed more conveniently, which is particularly useful when sensors need regular cleaning, inspection, calibration or replacement.
This can be valuable in processes where sticky media or solid particles make conventional sensor removal more difficult.
Built for Aggressive Media
The CPA140 is specifically positioned for demanding process applications involving aggressive media.
Depending on the selected version, the immersion tube and sensor holder are manufactured from PVDF or stainless steel 1.4404, while different O-ring materials are available, including EPDM, Viton, Chemraz and Fluoraz.
This range of material options allows the assembly to be matched more closely to the process environment.
Three Sensor Positions
The assembly provides three mounting positions for 120 mm sensors. This allows multiple electrodes or an electrode combined with a cleaning arrangement to be installed within the same process connection.
Endress+Hauser also specifies an integrated spray cleaning unit CPR31 for applicable configurations.
Flange-Mounted Installation
The CPA140 uses a pressurized flange connection for installation in closed tanks.
Available process connection standards include DIN, ANSI and JIS, allowing the assembly to be integrated into different tank and piping standards.
Suitable for Deep Tank Installation
The standard immersion depth is 500 to 2500 mm, with special lengths available on request.
This allows the sensor position to be adapted to different tank geometries and measurement points.
Condensation Protection
The CPA140 includes a Gore-Tex filter designed to reduce condensation within the assembly.
This is particularly useful in closed-tank installations where temperature differences and process conditions can lead to moisture accumulation.
Designed for Industrial Process Environments
Endress+Hauser lists the CPA140 for applications in the chemical, petrochemical, life sciences, power generation, waste incineration, extractive metallurgy and metal-processing industries.
Its combination of durable materials, flange mounting and accessible sensor installation makes it suitable for demanding industrial tank applications.
Key Features
Immersion assembly for pH and ORP sensors
Designed for closed tanks
Suitable for aggressive media and applications containing solid particles
Space for up to 3 × 120 mm sensors
Bayonet lock for easier sensor installation and removal
Available with integrated CPR31 spray cleaning unit
PVDF or stainless steel 1.4404 construction
Multiple O-ring material options
DIN, ANSI and JIS flange connections
Immersion depth 500–2500 mm
Special immersion lengths available
Integrated Gore-Tex filter to reduce condensation
Maximum process temperature 150°C
Maximum process pressure 10 bar for stainless steel / 6 bar for PVDF
Suitable for chemical, petrochemical, life sciences, power and metal-processing applications
Typical Applications
Chemical Processing
The CPA140 is designed for demanding chemical applications where pH or ORP sensors need to be installed inside closed tanks containing aggressive process media.
Petrochemical Processes
Its flange-mounted construction and corrosion-resistant material options make it suitable for selected petrochemical tank applications where robust sensor installation is required.
Life Sciences
The CPA140 can be used for pH or ORP measurement installations in suitable life-science processes where closed-tank sensor mounting is required.
Power Generation and Waste Incineration
Endress+Hauser lists power plants and waste incineration plants among the intended application areas for the CPA140.
Metal Extraction and Processing
The assembly is also intended for extractive metallurgy and metal processing, where aggressive media and suspended solids can make sensor installation and maintenance more demanding.
Processes with Sticky or Solid-Containing Media
The bayonet sensor mounting concept is particularly useful where sticky media or solid particles could make conventional electrode installation and removal more difficult.
Closed-Tank pH and ORP Measurement
The CPA140 is suited to closed-tank measurement points where pH or ORP electrodes need to be installed at a defined immersion depth and periodically accessed for maintenance.
FAQ
What is the Endress+Hauser Dipfit CPA140?
The CPA140 is an immersion assembly for pH and ORP sensors. It provides the mechanical installation and positioning of compatible electrodes inside closed process tanks.
Is the CPA140 a pH sensor?
No. The CPA140 is an immersion assembly, not a pH or ORP sensor. A compatible electrode must be selected separately.
How many sensors can the CPA140 hold?
The assembly provides three mounting positions for 120 mm sensors, depending on the selected configuration.
What type of sensors are used with the CPA140?
The CPA140 is designed for pH or ORP sensors with the applicable 120 mm installation dimensions. The exact sensor compatibility should be checked against the selected configuration.
What is the main advantage of the bayonet lock?
The bayonet lock simplifies installation and removal of the electrode holder, which can make maintenance and recalibration more convenient, particularly in processes containing sticky media or solid particles.
Can the CPA140 be used with aggressive media?
Yes. The CPA140 is specifically designed for demanding applications involving aggressive media, with PVDF and stainless-steel construction options and several sealing-material choices.
What materials are available?
The immersion tube and sensor holder are available in PVDF or stainless steel 1.4404. O-ring options include EPDM, Viton, Chemraz and Fluoraz, depending on configuration.
What is the maximum immersion depth?
The standard immersion depth is 500 to 2500 mm, with special lengths available on request.
What is the maximum process temperature?
The maximum specified process temperature is 150°C (302°F).
What is the maximum process pressure?
The maximum process pressure is 10 bar for the stainless-steel version and 6 bar for the PVDF version, subject to the selected configuration.
Does the CPA140 support sensor cleaning?
Yes. The CPA140 can be configured with an integrated CPR31 spray cleaning unit, providing a cleaning option as part of the sensor installation.
Where is the CPA140 typically used?
Endress+Hauser lists applications in chemical, petrochemical, life sciences, power generation, waste incineration, extractive metallurgy and metal processing.
