When you order the CUA261 with optional housing, you will get a ready-to-use VARIVENT flow assembly. — When you order the CUA261 VARIVENT adapter with the optional VARINLINE housing, you will receive a complete flow assembly.

For already existing housings, you can order CUA261 as VARIVENT adapter only. — For already existing VARINLINE housings, you can order CUA261 as VARIVENT adapter only.

When you order the CUA261 VARIVENT adapter with the optional VARINLINE housing, you will receive a complete flow assembly.

Specs at a glance

Process temperature

0 to 135°C (32 to 275 °F)
Process pressure

max. 11 bar abs. (159 psi abs.) at 25°C (77°F)

See all specifications

Field of application

CUA261 is the right choice for you if you want to install a process photometer into pipelines with VARIVENT connection, for example for measurement of absorption, color or turbidity. Select from multiple path lengths and window materials to ensure a perfect fit into your process. CUA261 is available as VARIVENT adapter for already existing housings or can be ordered as complete flow assembly with VARINLINE housing.

The CUA261 can be used with:

OUSAF12 suspended solids and color sensor
OUSAF22 color sensor
OUSAF44 and OUSAF46 UV absorption sensors
OUSTF10 turbidity and suspended solids sensor

Typical applications are:

Color measurement
Chromatography control
Filtration monitoring
Centrifuge control
Protein concentration
Turbidity measurement
Phase detection
CIP optimization

CUA261 is suitable for hazardous area use.

VARIVENT and VARINLINE are registered trademarks of GEA Tuchenhagen GmbH.

Benefits

Allows installation of Endress+Hauser process photometers into processes where VARINLINE housings are used
Hygienic process connection, suitable for cleaning-in-place (CIP) and sterilization-in-place (SIP), ensures highest product safety
Wide range of window materials and optical path lengths for optimum adaption to every process
Compliant with FDA and (EC) No 1935/2004

Success stories

Pure high quality beer and clean wastewater

Discover how Heineken meets all regulations to protect the brazilian environment with the Viomax CAS51D digital nitrate or SAC sensor from Endress+Hauser.
Read the full story
Conductivity system optimises production of biosurfactants

Holiferm produces sustainable biosurfactants using a patented gravity separation fermentation process. The company was seeking a way to automate the measurement of the critical phase separation step.
Read the full story
Smart vertical farming in big cities

Intuitive pH and conductivity measurement in smart vertical farming plants to meet quality requirements and ensure comprehensive monitoring of processes.
Read the full story
Long-lasting performance during whey processing

With the help of the Memosens CPS77E sensor a safe monitoring of the pH values is possible, which must be guaranteed with the high requirements in the food industry.
Read the full story
High-quality sugar and no bittersweet surprise

To protect consumers, high quality standards apply in the food industry. Sugar quality must be measured by ICUMSA. This measurement is expensive and time consuming. With the OUSAF22 color sensor it is possible to measure the ICUMSA color value.
Read the full story

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Easy to select, install and operate

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Highly functional and convenient

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Designed for demanding applications

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Variable

What is FLEX?

FLEX selections	Technical excellence	Simplicity
F L E X Fundamental selection Meet your basic measurement needs	Technical excellence	Simplicity
F L E X Lean selection Handle your core processes easily	Technical excellence	Simplicity
F L E X Extended selection Optimize your processes with innovative technologies	Technical excellence	Simplicity
F L E X Xpert selection Master your most challenging applications	Technical excellence	Simplicity Variable

Learn more about the FLEX selections

Measuring principle

UV absorbance
Application

VARIVENT process connection for installation of the optical sensors: OUSAF44/46, OUSAF12, OUSAF22 and OUSTF10
Material

Body: stainless steel 316L
Windows: Borosilicate, quartz or sapphire
O-rings: EPDM, silicone, FKM
Process temperature

0 to 135°C (32 to 275 °F)
Process pressure

max. 11 bar abs. (159 psi abs.) at 25°C (77°F)

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2 documents

Operating Instruction (BA)

BA CUA261

Operating Instruction (BA)

English version - 12/2023

New version available in English

Adapter for installing process photometers in VARIVENT process
connections

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	EN
08/12/2023
31/12/2016

Language:	English
Version:	08/12/2023
File size:	1022.2 KB
File name:	BA01652CEN_0223-00.pdf

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Manufacturer Declaration

Product family: Armaturen

Manufacturer Declaration

English version - 10/2021

New version available in English

Product root: CUA261-
Declaration number: HE_01531_01.21
Manufacturer specification: PED

Select other languages, versions and see details Hide selection and details

	EN
28/10/2021

Language:	English
Version:	28/10/2021
File size:	324.2 KB
File name:	Klassifizierungsbescheinigung nach DGRL f�r CUA261.pdf

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Search spare parts by number in drawing

- Show drawing (PDF)

60 spare parts & accessories

Kit CUA261 Window 14mm Quartz

Optical assembly

Drawing number

Order code

1

71347354
Kit CUA261 Window 19mm Quartz

Optical assembly

Drawing number

Order code

1

71347355
Kit CUA261 Window 21.5mm Quartz

Optical assembly

Drawing number

Order code

1

71347356
Kit CUA261 Window 14mm Sapphire

Optical assembly

Drawing number

Order code

1

71347357
Kit CUA261 Window 19mm Sapphire

Optical assembly

Drawing number

Order code

1

71347358
Kit CUA261 Window 21.5mm Sapphire

Optical assembly

Drawing number

Order code

1

71347359
Kit CUA261 Window 14mm Borosilicate

Optical assembly

Drawing number

Order code

1

71347360
Kit CUA261 Window 19mm Borosilicate

Optical assembly

Drawing number

Order code

1

71347361
Kit CUA261 Window 21.5mm Borosilicate

Optical assembly

Drawing number

Order code

1

71347362
Kit CUA261 gaskets EPDM

Sealing

Drawing number

Order code

2

71347363
Kit CUA261 gaskets silicone

Sealing

Drawing number

Order code

2

71347365
Kit CUA261 gaskets FKM

Sealing

Drawing number

Order code

2

71347366
Kit CUA261 Lamp and detector O-rings

Sealing

Drawing number

Order code

3

71347367
Kit CUA261 Retrofit Air Purge

Accessories

Drawing number

Order code

4

71347368
Kit CUA261 pressure relief valve

Accessories

Drawing number

Order code

4

71347369

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Optional add-ons

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VARIVENT assembly for process photometers
CUA261

Flow assembly with VARIVENT adapter for a variety of optical inline measurements

Specs at a glance

Process temperature

Process pressure

Field of application

Benefits

Success stories

Pure high quality beer and clean wastewater

Conductivity system optimises production of biosurfactants

Smart vertical farming in big cities

Long-lasting performance during whey processing

High-quality sugar and no bittersweet surprise

Measuring principle

Application

Material

Process temperature

Process pressure

Back

BA CUA261

Product family: Armaturen

Back

Kit CUA261 Window 14mm Quartz

Kit CUA261 Window 19mm Quartz

Kit CUA261 Window 21.5mm Quartz

Kit CUA261 Window 14mm Sapphire

Kit CUA261 Window 19mm Sapphire

Kit CUA261 Window 21.5mm Sapphire

Kit CUA261 Window 14mm Borosilicate

Kit CUA261 Window 19mm Borosilicate

Kit CUA261 Window 21.5mm Borosilicate

Kit CUA261 gaskets EPDM

Kit CUA261 gaskets silicone

Kit CUA261 gaskets FKM

Kit CUA261 Lamp and detector O-rings

Kit CUA261 Retrofit Air Purge

Kit CUA261 pressure relief valve

Choose from our suggested options

Individual configuration

VARIVENT assembly for process photometersCUA261

Flow assembly with VARIVENT adapter for a variety of optical inline measurements

Specs at a glance

Process temperature

Process pressure

Field of application

Benefits

Success stories

Pure high quality beer and clean wastewater

Conductivity system optimises production of biosurfactants

Smart vertical farming in big cities

Long-lasting performance during whey processing

High-quality sugar and no bittersweet surprise

Measuring principle

Application

Material

Process temperature

Process pressure

Back

BA CUA261

Product family: Armaturen

Back

Kit CUA261 Window 14mm Quartz

Kit CUA261 Window 19mm Quartz

Kit CUA261 Window 21.5mm Quartz

Kit CUA261 Window 14mm Sapphire

Kit CUA261 Window 19mm Sapphire

Kit CUA261 Window 21.5mm Sapphire

Kit CUA261 Window 14mm Borosilicate

Kit CUA261 Window 19mm Borosilicate

Kit CUA261 Window 21.5mm Borosilicate

Kit CUA261 gaskets EPDM

Kit CUA261 gaskets silicone

Kit CUA261 gaskets FKM

Kit CUA261 Lamp and detector O-rings

Kit CUA261 Retrofit Air Purge

Kit CUA261 pressure relief valve

Choose from our suggested options

Individual configuration

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VARIVENT assembly for process photometers
CUA261