Technical Data
CompareTurbidity
| Measuring Principle | |
| Application | Online continuous monitoring of clean water : - Drinking water - Treated process water |
| Installation | Compact device for bypass-installations. |
| Characteristic | " Versions with infrared light source " Fast and easy calibration " Complete primary calibration in less than 5 minutes " Verification in seconds " Reduced calibration costs and quick response times thanks to low volume sample chamber " Automatic continuous ultrasonic cleaning (Autoclean)increases cleaning intervals dramatically " Simple modular design " Easy to use and service " Affordable thanks to modular microprocessor based technology " Digital high-speed connections through RS-485 with Modbus Optional Features: " Flow chamber for bubble suppression " Reusable calibration kit |
| Measuring range | 0 - 1000 NTU |
| Measuring principle | Turbidity measurement using standardised 90° scattered light method acc. to ISO 7027/EN27027(Infrared Light) |
| Design | The transmitted infrared light beam is scattered by the solid matter particles in the medium. The scattered light beams are detected by scattered light receivers which are arranged at an angle of 90° to the light source. |
| Material | Housing: ABS Flow-through head: Nylon Sample cuvette: Borosilicate glass Sample cuvette seal: Silicone Flow-through fittings: Polypropylene Flow-through lock down pins: Stainless steel (AISI 304 or AISI 303) Inlet tube: Stainless steel (AISI 316) |
| Dimension | 347,16 x 207,65 x 196,85 mm (13.66 x 8.17 x7.75 inches) |
| Process temperature | 1°C - 50°C ( 34 - 122°F |
| Process pressure | max. 13.78 bar / 200 psicontrolled by integral pressure regulator |
| Ingress protection | IP66 |
| Output / communication | 4-20mA, galvanic isolated Bi-directional RS-485, Modbus optional. |
Product Overview
Turbimax CUE21 is a reliable turbidity meter conforming to EN ISO 7027 for continuous measurement of water turbidity. It is simple to operate: connect the water supply, set the parameters, and the system runs automatically. Turbimax CUE21 provides calibration guidance based on preset standards, effectively improving maintenance efficiency. It features automatic ultrasonic cleaning, which extends maintenance intervals and saves considerable operating costs.
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Benefits
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Long maintenance intervals, saving operating costs
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Calibration and verification completed in seconds, simple and fast
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Low-volume measuring chamber reduces calibration costs and accelerates response time
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Automatic continuous ultrasonic cleaning reduces maintenance work
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Sampling conditions, including flow and pressure, can be adjusted
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Application
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Turbimax CUE21 online turbidity meter for:
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Drinking water and process water:
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process monitoring
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filter monitoring and filter backwashing in waterworks
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water quality monitoring in waterworks distribution networks
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Utilities:
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return lines
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cooling water monitoring
Spare Parts & Accessories 10
10 spare parts · click to collapse
| Order code | Description | |
|---|---|---|
| 71030103 | CUE21 Service Electronic ModuleLight source: Infrared LED (850 nm) Measuring range: 0 - 1000 NTU Spare part turbidity measurement | Details |
| 71030105 | Field junction box CUE21/CUE22Supply voltage: 100-240 VAC Spare part turbidity measurement | Details |
| 51518578 | Desiccant for CUE21/CUE22Refill pack Accessory turbidity measurement | Details |
| 51518579 | Pipe fittings for CUE21/CUE22Accessory turbidity measurement | Details |
| 51518576 | Ultrasonic cleaning glass tube for CUE21/CUE22Accessory turbidity measurement | Details |
| 51518580 | CUE21/CUE23/CUE24 Calibration KitReady-for-use solutions: 0,02 NTU, 10 NTU and 1000 NTU Accessory turbidity measurement | Details |
| 51518575 | Flow-through chamber for CUE21/CUE22for bubble suppression Accessory turbidity measurement | Details |
| 71085512 | *** Pressure Regulator CUE21/22 | Details |
| 71267830 | O-ring | Details |
| 71267825 | *** Flow Cell Flow Regulator | Details |
Configurator / Comparison
Manuals & Documents 2
All documents for this modelCase 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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