TI01710C/07/EN/01.23-00
71605175
2023-02-20

Products

Solutions

ServicesTechnical Information
FlowFit CPA25
Flow assembly for 12 mm sensors for pH/ORP,
conductivity and oxygen measurement

Application
The Flowfit CPA25 flow assembly is designed for the implementation of measuring
points in industrial auxiliary processes and in water/wastewater treatment. It has
room for three sensors and keeps the sensors wet even if flow is interrupted. This
ensures a longer sensor operating life. The assembly itself is made from corrosionresistant polypropylene and is therefore very durable. With Flowfit CPA25, you get
the perfect product for your standard applications. Flowfit CPA25 can be used inmany applications in industrial auxiliary processes and in water/wastewater
treatment. It is designed for a variety of applications, including:• Drinking water supply• Water and wastewater treatment• Water cooling circuits• Osmosis systems
It can be used at pressures up to 6 bar (87 psi).
Your benefits• Compact design with 3x PG 13.5 sensor slots.
• Special flow geometry to achieve reliable and stable measured values from theinstalled sensors.
• Siphon profile protects the sensors from drying out during plant downtimes.
• Service cap for easy sensor cleaning and installation.
• Sensor calibration to check sensors are functioning correctly can be performed withsensors installed.

FlowFit CPA25

Function and system design
Operating principle

The Flowfit CPA25 flow assembly is designed for the installation of up to 3x PG 13.5 sensor slots
with a nominal shaft length of approx. 120 mm (4.72 in).
The assembly is used to implement measuring points for nonhazardous liquids in the water /wastewater treatment sectors and in industrial auxiliary processes.
Thanks to its design, it can be used in pressurized systems.

125
3

4A0051130

112345

Measuring system

2

Overview of CPA25
Splash cover
Mounting hole
NameplateService cap
Process connection

A complete measuring system comprises:• Flowfit CPA25 assembly• Up to 3 sensors with a shaft length of 120 mm (4.72 in), e.g. pH Memosens CPS11E, conductivity
Memosens CLS82E or oxygen COS81E• Transmitter, e.g. Liquiline CM44x• Measuring cable, e.g. CYK10Endress+Hauser

FlowFit CPA25

126

345A0051847

2

Example of a measuring system with Flowfit CPA25

1Liquiline CM44x transmitter
2Measuring cable CYK10
3Flowfit CPA25 assembly
4, 5 12 mm sensors, e.g. pH Memosens CPS61E, conductivity Memosens CLS82E or oxygen COS81E
6Sample water supply with valve

Dependability• The assemblies are manufactured in accordance with Endress+Hauser's certified quality criteria.
• The fixed assembly is manufactured from high-grade materials:• Assembly: polyproplylene (PP)
• Blind plug: polyvinylidenefluoride (PVDF)• Only these materials and the relevant seal (EPDM or FKM) are in contact with the processmedium.

MountingOrientation• The assembly is designed for installation in pipe networks. Suitable supply lines and dischargelines must be provided by the customer onsite.
• The seal to the process connections that seals the assembly from the supply and discharge lines
must be provided by the customer onsite.

‣A0052001

Only mount the assembly vertically.
 This allows the medium to flow through horizontally.

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FlowFit CPA25

Environment
Ambient temperature range-15 to +60 °C (5 to +140 °F)

Storage temperature-15 to +60 °C (5 to +140 °F)

Process
Thermoplastics have temperature-dependent mechanical properties.

‣ Observe these properties when selecting components.
Process temperature range

0 to 80 °C (32 to 176 °F)

Process pressure range

0 to 6 bar (0 to 87 psi) relative
Maximum pressure at up to 20°C (68°F)
6 bar (87 psi) gauge pressure
Maximum pressure at 80°C (176°F)
1 bar (14.5 psi) gauge pressure°F
40 60 80 100 120 140160 180 200 220 240
1766868780
706050 psi
4030201554bar

321204060

80°C

100

115
A0051695

3Flow limit

Temperature/pressure ratings

Flow velocity‣ Pay attention to limitations of the sensors.
Depending on the flow velocity, the zeta value of the assembly is between: 4.5 to 5.5

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FlowFit CPA25

Mechanical construction

248 (9.76)
400 (15.74)
110 (4.33)

G 1" /NPT 1"

2.8 (0.11) (2x)

Ø 68
(2.67)
110 (4.33)

45 (1.77)

Ø 40 (1.57)

Design, dimensions

88(3.46)
A0051249

4Dimensions. Unit of measurement mm (in)

Ø 9 (0.35)80(3.15)88(3.46)
A0051269

5Endress+Hauser

Dimensions of bore for wall holder. Unit of measurement mm (in)5FlowFit CPA25

The assembly has an integrated wall holder.

70 (2.75)

323 (12.71)‣81 (3.18)

37,5 (1.47)

84 (3.30)
A0052073

Screw the assembly onto a wall or mounting plate with suitable screws (see the dimensions).
WeightApprox. 0.8 kg (1.8 lbs)

Materials

Component

Material

Flow housing

PPService cap

PP

Splash cover

PPAdapters

PPBlind plug

PVDF

PAL option 1(option 1 and 2 mutually exclude one another)

1.4404/316L

PAL option 2(option 1 and 2 mutually exclude one another)

3.7035/ Ti Grade 2

Process connections

Depending on version:• 2 x G1 (female)• 2 x NPT 1" (female)
Optional adapters:• G1" to G1/2" female thread• G1" to G3/4" female thread
Seal is supplied by customer:
e.g. PTFE tapeSensor connections

3x PG13.5
Supported shaft length
120 mm (4.72 in)

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FlowFit CPA25

Maximum number of sensors installed
3 sensors possible, e.g.:• 2 with Memosens connection• 1 with KCl connection

Endress+Hauser

7FlowFit CPA25

Ordering information
Ordering instructions

Create the order code for the assembly as follows:1.

Is the assembly used in the hazardous or non-hazardous area?

2.

Select the drive type and the limit position switches.

3.

Select the type of service chamber.

4.

What material should the wetted seals be made of?

5.

What material should the wetted surfaces be made of?

6.

Select the suitable process connection.

7.

Which connections should the service chamber have?

Order the accessories as follows:• If you wish to order the accessories together with the assembly, then use the accessory code of theproduct structure.
• If you only wish to order accessories, then use the order numbers from the "Accessories" section.
Product pagewww.endress.com/CPA25

Product Configurator

1.

Configure: Click this button on the product page.

2.

Select Extended selection.
 The Configurator opens in a separate window.

3.

Configure the device according to your requirements by selecting the desired option for eachfeature.
 In this way, you receive a valid and complete order code for the device.

4.

Apply: Add the configured product to the shopping cart.
For many products, you also have the option of downloading CAD or 2D drawings of theselected product version.

5.

Scope of delivery

8Show details: Open this tab for the product in the shopping cart.
 The link to the CAD drawing is displayed. If selected, the 3D display format is displayed
along with the option to download various formats.

The scope of delivery comprises:• Assembly in the version ordered• Splash cover• Service cap• Auxiliary tool for mounting sensor• Anti-bend protector for KCl supply• Blind plug (3x)• Operating Instructions• Optionally selected accessories

Endress+Hauser

FlowFit CPA25

Certificates and approvals
Current certificates and approvals that are available for the product can be selected via the ProductConfigurator at www.endress.com:

Endress+Hauser

1.

Select the product using the filters and search field.

2.

Open the product page.

3.

Select Configuration.

9FlowFit CPA25

Accessories
The following are the most important accessories available at the time this documentation wasissued.
Listed accessories are technically compatible with the product in the instructions.

Device-specific accessories

1.

Application-specific restrictions of the product combination are possible.
Ensure conformity of the measuring point to the application. This is the responsibility of theoperator of the measuring point.

2.

Pay attention to the information in the instructions for all products, particularly the technical
data.

3.

For accessories not listed here, please contact your Service or Sales Center.

Sensors
pH sensors
Memosens CPS11E• pH sensor for standard applications in process and environmental engineering• Digital with Memosens 2.0 technology• Product Configurator on the product page: www.endress.com/cps11e
Technical Information TI01493COrbisint CPS11• pH sensor for process technology• With dirt-repellent PTFE diaphragm• Product Configurator on the product page: www.endress.com/cps11
Technical Information TI00028C
Memosens CPS31E• pH sensor for standard applications in drinking water and swimming pool water• Digital with Memosens 2.0 technology• Product Configurator on the product page: www.endress.com/cps31e
Technical Information TI01574C
Ceraliquid CPS41• pH electrode with ceramic junction and KCl liquid electrolyte• Product Configurator on the product page: www.endress.com/cps41
Technical Information TI00079C
Memosens CPS41E• pH sensor for process technology• With ceramic junction and KCl liquid electrolyte• Digital with Memosens 2.0 technology• Product Configurator on the product page: www.endress.com/cps41e
Technical Information TI01495C
Memosens CPS61E• pH sensor for bioreactors in life sciences and for the food industry• Digital with Memosens 2.0 technology• Product Configurator on the product page: www.endress.com/cps61e
Technical Information TI01566C
Memosens CPS71E• pH sensor for chemical process applications• Digital with Memosens 2.0 technology• Product Configurator on the product page: www.endress.com/cps71e
Technical Information TI01496C

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FlowFit CPA25

Ceragel CPS71• pH electrode with reference system including ion trap
• Product Configurator on the product page: www.endress.com/cps71
Technical Information TI00245C
Memosens CPS91E• pH sensor for heavily polluted media• Digital with Memosens 2.0 technology• Product Configurator on the product page: www.endress.com/cps91e
Technical Information TI01497C
Orbipore CPS91• pH electrode with hole junction for media with high dirt load
• Product Configurator on the product page: www.endress.com/cps91
Technical Information TI00375C
ORP sensors
Memosens CPS12E• ORP sensor for standard applications in process and environmental engineering• Digital with Memosens 2.0 technology• Product Configurator on the product page: www.endress.com/cps12e
Technical Information TI01494C
Orbisint CPS12• ORP sensor for process technology• Product Configurator on the product page: www.endress.com/cps12
Technical Information TI00367C
Memosens CPS42E• ORP sensor for process technology• Digital with Memosens 2.0 technology• Product Configurator on the product page: www.endress.com/cps42e
Technical Information TI01575C
Ceraliquid CPS42• ORP electrode with ceramic junction and KCl liquid electrolyte• Product Configurator on the product page: www.endress.com/cps42
Technical Information TI00373C
Memosens CPS72E• ORP sensor for chemical process applications• Digital with Memosens 2.0 technology• Product Configurator on the product page: www.endress.com/cps72e
Technical Information TI01576C
Ceragel CPS72• ORP electrode with reference system including ion trap
• Product Configurator on the product page: www.endress.com/cps72
Technical Information TI00374C
pH-ISFET sensors
Memosens CPS47E• ISFET sensor for pH measurement• Digital with Memosens 2.0 technology• Product Configurator on the product page: www.endress.com/cps47e
Technical Information TI01616CEndress+Hauser

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Memosens CPS77E• Sterilizable and autoclavable ISFET sensor for pH measurement• Digital with Memosens 2.0 technology• Product Configurator on the product page: www.endress.com/cps77e
Technical Information TI01396
Combined pH/ORP sensors
Memosens CPS16E• pH/ORP sensor for standard applications in process technology and environmental engineering• Digital with Memosens 2.0 technology• Product Configurator on the product page: www.endress.com/cps16e
Technical Information TI01600C
Memosens CPS76E• pH/ORP sensor for process technology• Digital with Memosens 2.0 technology• Product Configurator on the product page: www.endress.com/cps76e
Technical Information TI01601C
Memosens CPS96E• pH/ORP sensor for heavily polluted media and suspended solids• Digital with Memosens 2.0 technology• Product Configurator on the product page: www.endress.com/cps96e
Technical Information TI01602C
Conductivity sensors
Memosens CLS82E• Hygienic conductivity sensor• Digital with Memosens 2.0 technology• Product Configurator on the product page: www.endress.com/cls82e
Technical Information TI01529C
Oxygen sensors
Oxymax COS22E• Sterilizable sensor for dissolved oxygen• Digital with Memosens 2.0 technology• Product Configurator on the product page: www.endress.com/cos22e
Technical Information TI00446C
Oxymax COS22D / COS22• Sterilizable sensor for dissolved oxygen• With Memosens technology or as an analog sensor• Product Configurator on the product page: www.endress.com/cos22d or www.endress.com/cos22
Technical Information TI00446C
Memosens COS81E• Hygienic optical oxygen sensor with maximum measurement stability over multiple sterilization
cycles• Digital with Memosens 2.0 technology• Product Configurator on the product page: www.endress.com/cos81e
Technical Information TI01558C
Process connections• G1" to G1/2" female thread; Order No. 71604519• G1" to G3/4" female thread; Order No. 71604521

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Mounting accessories
Railing holder; Order No. 71573126
Service-specific accessories• Splash cover; Order No. 71572887• Service cap; Order No. 71573088• Cover without PML; Order No. 71573103• Cover with PML 316L/EPDM; Order No. 71573106• Cover with PML titanium/EPDM; Order No. 71573116• Cover with PML 316L/FKM; Order No. 71573119• Cover with PML titanium/FKM; Order No. 71573121• Blind plugs PG13.5; Order No. 71573122
Cleaning accessories
Cleaning brushes; Order No. 71573123
Seals• EPDM seals; Order No. 71572882• FKM seals; Order No. 71572884• Silicone grease for seals; Order No. 71573128

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