Technical Data
CompareConcentration
| 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) |
VARIVENT assembly for the inline photometer
CUA261
Flow assembly with VARIVENT adapter for various optical inline measurements
Benefits
Allows Endress+Hauser process photometers to be installed in processes using VARINLINE housings
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Hygienic process connection, suitable for cleaning in place (CIP) and sterilization in place (SIP), ensuring the highest product safety
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Various window materials and optical path lengths for optimum adaptation to various processes
Compliant with FDA and (EC) No 1935/2004
Application areas
If you want to install an inline photometer into pipelines with VARIVENT connections, e.g. for measuring absorption, color or turbidity, the CUA261 is the right choice. Choose from various optical path lengths and window materials to ensure a perfect fit for your process. The CUA261 is available as a VARIVENT adapter for existing housings or can be ordered as a complete flow assembly with a VARINLINE housing.
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The CUA261 can be used for:
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OUSAF12 suspended solids and color sensor
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OUSAF22 color sensor
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OUSAF44 and OUSAF46 UV absorption sensors
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OUSTF10 turbidity and suspended solids sensor
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Typical applications include:
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Color measurement
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Chromatography control
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Filtration monitoring
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Centrifuge control
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Protein concentration
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Turbidity measurement
Spare Parts & Accessories 15
15 spare parts · click to collapse
| Order code | Description | |
|---|---|---|
| 71347354 | Kit CUA261 Window 14mm Quartz1x optical window | Details |
| 71347355 | Kit CUA261 Quartz Window 19 mm1x optical window | Details |
| 71347356 | Kit CUA261 Window 21.5mm Quartz1x optical window | Details |
| 71347357 | Kit CUA261 Window 14mm Sapphire1x optical window | Details |
| 71347358 | Kit CUA261 Window 19mm Sapphire1x optical window | Details |
| 71347359 | Kit CUA261 Window 21.5mm Sapphire1x optical window | Details |
| 71347360 | Kit CUA261 Window 14mm Borosilicate1x optical window | Details |
| 71347361 | Kit CUA261 Window 19mm Borosilicate1x optical window | Details |
| 71347362 | Kit CUA261 Window 21.5mm Borosilicate1x optical window | Details |
| 71347363 | CUA261 EPDM gasket kit | Details |
| 71347365 | CUA261 silicone gasket kit | Details |
| 71347366 | Kit CUA261 gaskets FKM | Details |
| 71347367 | Kit CUA261 Lamp and detector O-rings | Details |
| 71347368 | Kit CUA261 Retrofit Air Purge | Details |
| 71347369 | Kit CUA261 pressure relief valve | Details |
Configurator / Comparison
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Manuals & Documents 2
All documents for this modelCase Studies
Municipal Wastewater Treatment · brackets — Application Case
Customer Profile
The typical setting in Municipal Wastewater Treatment is the inlet, biological and outlet stages of a municipal plant. The measuring point is brackets; the focus is mounting, fixation and position adjustment for instruments.
Key Difficulties
Conditions are high solids and corrosive fractions, with large diurnal flow swings and, on top of that, effluent parameters drift and probes foul with sludge and biofilm, which a standard configuration cannot handle for long. The design therefore starts with checking structural strength by material, corrosion class and load.
Implementation
The scope ran through the system components range: supplying as a full cabinet and signal-chain configuration. Technically it hinges on checking structural strength by material, corrosion class and load, and on these requirements: stable compliance with Grade 1A discharge limits and online data reporting.
Customer Benefit
In practice this means accurate mounting positions that remove measurement bias at the source, which cut the workload on the site maintenance team.
Food & Beverage · brackets — Application Case
Project Background
The project covers dosing, pasteurising, filling and CIP stages. The work centres on brackets and the core task is mounting, fixation and position adjustment for instruments.
Operating Challenges
The medium and duty are characterised by syrups, dairy and beverages that scale easily, under strict hygienic requirements, and frequent cleaning demands instruments that withstand hot CIP/SIP caustic cycles. So brackets cannot be specified generically — it calls for checking structural strength by material, corrosion class and load.
Solution
The Ainstru engineering team worked through the system components range: supplying as a full cabinet and signal-chain configuration. The configuration involves checking structural strength by material, corrosion class and load, with these requirements in view: food-safety and hygienic design per 3-A / EHEDG.
Results
Since start-up the system has run steadily; the practical result is accurate mounting positions that remove measurement bias at the source.
Chemical & Pharmaceutical · brackets — Application Case
Project Overview
The site is reactors, metering vessels and finished-product tanks. The customer wanted brackets properly configured on the existing plant, with the aim of mounting, fixation and position adjustment for instruments.
Technical Challenges
What actually causes trouble is highly corrosive media with solvents and crystallisation, partly in explosive atmospheres, and corrosion plus Ex protection shortens instrument life and makes downtime costly. All of this means the brackets configuration has to involve checking structural strength by material, corrosion class and load.
Configuration
Supply and installation were organised through the system components range: supplying as a full cabinet and signal-chain configuration. On site this meant checking structural strength by material, corrosion class and load, checked line by line against: Ex certification and GMP traceability of records.
Performance
After commissioning the outcome is accurate mounting positions that remove measurement bias at the source, and the readings are now used for process tuning.
Power & Energy · brackets — Application Case
Site Conditions
This is a Power & Energy customer whose plant is at boiler feedwater, turbine condensate and FGD/DeNOx systems. The main task was mounting, fixation and position adjustment for instruments.
The Problem
The difficulty lies in high temperature and pressure with both steam and saline water; at the same time drift under high temperature and pressure, with very costly unplanned outages. Specification therefore means checking structural strength by material, corrosion class and load.
What We Did
We took a system components range approach — supplying as a full cabinet and signal-chain configuration. Delivery was built around checking structural strength by material, corrosion class and load, with point-by-point checks on: compliance with power-industry codes and unit availability targets.
Operating Outcome
In service the system performs as intended — accurate mounting positions that remove measurement bias at the source, with routine maintenance falling noticeably.
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