Technical Data
CompareTurbidity
| Measuring Principle | Single beam scattered light |
| Application | - Primary sludge and return activated sludge in sewage treatment plants.- Sludge centrifuge monitoring- Filter monitoring and filter backwash- Monitoring of phase break processes.- Cooling water monitoring. |
| Installation | Manual retractable holder with ball valve for pipe or bypass installations. |
| Characteristic | - Cleaning possible in every operation mode due to rinse water connection.- Sensor monitoring and calibration without process interrupt. |
| Design | Manual retractable holder with rinse water connections and external cleaning system. Rinse water connection can be used as sealing water inlet. |
| Material | Holder : stainless steel 1.4404Sealing : Viton |
| Dimension | Immersion depth : 170mm or 270mm (6.63 - 10.53inch) |
| Process temperature | 0 to 85 °C (32 to 185 °F) |
| Process pressure | For manual assembly operation : max 2bar (29psi) Medium pressure : max. 10bar (145psi) |
| Connection | Process connections : Flange DN50/PN16; ASME 2"/150lbs; G2";Rinse water connections: 2x G1/8; Air supply: 9mm tubing. |
Cleanfit CUA451 is a retractable assembly for turbidity and suspended-solids concentration measurement in all fields. It is equipped with a connection bolt, O-rings and a ball valve, ensuring that the process and the sensor measuring operation are independent of each other. This allows the sensor to be operated, and pipes and tanks to be drained, without interrupting the process. What is more, you benefit from a more efficient process, greater operational safety and significantly reduced maintenance effort throughout the entire measurement.
Benefits
One assembly for all kinds of applications: “one for all” optimizes inventory, accelerates project progress and simplifies life-cycle maintenance
Simple and safe maintenance: sensor cleaning and maintenance without interrupting the process
Robust design: process pressures up to 10 bar (145 psi), up to 2 bar (29 psi) for manual operation.
Convenient and time-saving operation: the sensor can be cleaned directly via the rinse water connection without being removed
Application
Cleanfit CUA451 is a retractable turbidity measurement assembly, suitable for:
Wastewater treatment plants:
- Sludge monitoring in return lines
- Sludge centrifuge monitoring
- Primary sludge and sludge treatment
Drinking water and process water:
- Sludge treatment in waterworks
- Monitoring of filters and filter backwash
- Monitoring of digestion processes
Monitoring of filters and filter backwash
Utilities:
- Sludge treatment
- Return lines
- Cooling water monitoring
Spare Parts & Accessories 25
25 spare parts · click to collapse
| Order code | Description | |
|---|---|---|
| 51512981 | O-ring | Details |
| 51513156 | outer sleeve | Details |
| 51513158 | outer sleeve | Details |
| 71425249 | Kit universal sensor holder short | Details |
| 71425251 | Kit universal sensor holder long | Details |
| 71425252 | Retrofit kit, universal short sensor holder | Details |
| 71425253 | Retrofit kit, universal long sensor holder | Details |
| 71425255 | Locking ring kit for new sensor holder | Details |
| 71475985 | Kit CUA451/COA451 Bayonet nut | Details |
| 51513163 | CYA451 Sensor BracketFor Sensors CUS41, CUS51D, COS31, COS61, COS61D | Details |
| 51513164 | ***Kit COA/CUA451: Sensor holder CUS41 LongFor Sensors CUS41, CUS51D, COS31, COS61, COS61D | Details |
| 51513166 | Kit COA/CUA451: Sensor holder CUS65, shortFor Sensors CUS65, COS41, COS51D | Details |
| 51513167 | ***Kit COA/CUA451: Sensor Holder CUS65 LongFor Sensors CUS65, COS41, COS51D | Details |
| 71254975 | CUA451 spare part: CUS52D sensor sheath, shortSuccessor kit: 71425252 or 71425249 | Details |
| 71254976 | Kit CUA451: Sensor holder CUS52D long | Details |
| 71485020 | Kit CPA451 Bayonet nut | Details |
| 51513168 | ball handle | Details |
| 51513169 | CYA451 Bracketincludes 5 bracket, 10 Securing screws 2 Bayonet lock, 15 Grub screw 1 Greace nipple | Details |
| 51512982 | ball valve | Details |
| 51513154 | ball valve | Details |
Configurator / Comparison
Source:Endress+Hauserpublic information on the website
Measuring principle video
Click to playManuals & Documents 7
All documents for this model7 documents · click to expand
Product Videos
Case Studies
Municipal Wastewater Treatment · turbidity — Application Case
Project Background
The project covers the inlet, biological and outlet stages of a municipal plant. The work centres on turbidity and the core task is measuring turbidity as an indicator of suspended solids and filtration.
Operating Challenges
The medium and duty are characterised by high solids and corrosive fractions, with large diurnal flow swings, and effluent parameters drift and probes foul with sludge and biofilm. So turbidity cannot be specified generically — it calls for choosing 90° scatter or surface scatter by range, with de-bubbling.
Solution
The Ainstru engineering team worked through the analyser range: selecting as part of a complete water-analysis system. The configuration involves choosing 90° scatter or surface scatter by range, with de-bubbling, with these requirements in view: stable compliance with Grade 1A discharge limits and online data reporting.
Results
Since start-up the system has run steadily; the practical result is backwashing triggered by water quality, saving water while holding quality.
Food & Beverage · turbidity — Application Case
Project Overview
The site is dosing, pasteurising, filling and CIP stages. The customer wanted turbidity properly configured on the existing plant, with the aim of measuring turbidity as an indicator of suspended solids and filtration.
Technical Challenges
What actually causes trouble is syrups, dairy and beverages that scale easily, under strict hygienic requirements, and frequent cleaning demands instruments that withstand hot CIP/SIP caustic cycles. All of this means the turbidity configuration has to involve choosing 90° scatter or surface scatter by range, with de-bubbling.
Configuration
Supply and installation were organised through the analyser range: selecting as part of a complete water-analysis system. On site this meant choosing 90° scatter or surface scatter by range, with de-bubbling, checked line by line against: food-safety and hygienic design per 3-A / EHEDG.
Performance
After commissioning the outcome is backwashing triggered by water quality, saving water while holding quality, and the readings are now used for process tuning.
Chemical & Pharmaceutical · turbidity — Application Case
Site Conditions
This is a Chemical & Pharmaceutical customer whose plant is at reactors, metering vessels and finished-product tanks. The main task was measuring turbidity as an indicator of suspended solids and filtration.
The Problem
The difficulty lies in highly corrosive media with solvents and crystallisation, partly in explosive atmospheres; at the same time corrosion plus Ex protection shortens instrument life and makes downtime costly. Specification therefore means choosing 90° scatter or surface scatter by range, with de-bubbling.
What We Did
We took a analyser range approach — selecting as part of a complete water-analysis system. Delivery was built around choosing 90° scatter or surface scatter by range, with de-bubbling, with point-by-point checks on: Ex certification and GMP traceability of records.
Operating Outcome
In service the system performs as intended — backwashing triggered by water quality, saving water while holding quality, with routine maintenance falling noticeably.
Power & Energy · turbidity — Application Case
Application Context
boiler feedwater, turbine condensate and FGD/DeNOx systems is a typical Power & Energy duty. The project started from turbidity, focusing on measuring turbidity as an indicator of suspended solids and filtration.
Process Constraints
drift under high temperature and pressure, with very costly unplanned outages, and high temperature and pressure with both steam and saline water only amplify it. The turbidity specification must therefore cover choosing 90° scatter or surface scatter by range, with de-bubbling.
Delivery Approach
Delivery was handled as the analyser range — selecting as part of a complete water-analysis system. Execution centred on choosing 90° scatter or surface scatter by range, with de-bubbling, together with compliance with power-industry codes and unit availability targets.
Field Results
Operation shows the benefit clearly — backwashing triggered by water quality, saving water while holding quality, with confidence in this measuring point improving markedly.
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