Technical Data
CompareConductivity
| Measuring Principle | Conductive |
| Application | Surface water + water Waste water Process industry Media separation Industrial water |
| Characteristic | Digital 2-electrode conductivity sensor |
| Measuring range | k=1: 10 µS/cm to 20 mS/cm |
| Measuring principle | Conductive conductivity cell with graphite electrodes |
| Design | 2-electrode conductivity cell with parallel arranged electrodes |
| Material | Sensor shaft: PES Electrodes: graphite |
| Dimension | Diameter: 24 mm (0.94 inch) Length: 61 mm (2.40 inch) |
| Process temperature | -20 to 135 °C at 3.5 bar abs (-4 to 275 °F at 50 psi) |
| Process pressure | 17 bar abs at 20 °C (246 psi at 68 °F) |
| Temperature sensor | Pt1000 |
| Ex certification | ATEX, CSA, NEPSI, EAC Ex, IECEx, INMETRO |
| Connection | Process connection: DN25, DN40, G1, NPT 1" Sensor connection: Inductive, digital connection head with Memosens 2.0 technology |
| Ingress protection | IP68 |
The Memosens CLS21E conductivity sensor is robust and suitable for all kinds of water quality measurements in the medium conductivity range. It reliably delivers high-precision measured values for optimum quality monitoring. The sensor is corrosion-resistant and highly mechanically stable, guaranteeing a long service life. The CLS21E uses Memosens 2.0 digital technology, offers maximum process and data integrity, is simple to operate and is the perfect basis for preventive maintenance and advancing IIoT technology.
Advantages
Measurement in the medium conductivity range, reliably delivering high-precision measured values for optimum quality monitoring.
Robust, strongly corrosion-resistant and low maintenance: the sensor is unaffected by corrosion and has high mechanical and chemical stability.
The exact cell constant is indicated in the quality certificate, guaranteeing high-precision measuring results.
Non-contact inductive signal transmission for high process and data integrity.
Memosens 2.0 technology stores a large amount of calibration and process parameters in the sensor, making it the perfect basis for preventive maintenance and advancing IIoT technology.
Application areas
The Memosens CLS21E measures in various water applications, such as:
Tap water
Desalination plants
Industrial water treatment
River or lake water monitoring
With international explosion protection approvals, e.g. ATEX, FM, CSA and NEPSI, the digital sensor can be used in hazardous areas.
Spare Parts & Accessories 7
7 spare parts · click to collapse
| Order code | Description | |
|---|---|---|
| 50081902 | Calibration solution 74.0 µS/cm500 ml, reference temperature 25oC. Precision solution referred to SRM of NIST. With temp. table for qualified calibration of conductivity measuring systems acc. to ISO | Details |
| 50081903 | calibration solution500 ml, reference temperature 25oC. Precision solution referred to SRM of NIST. With temp. table for qualified calibration of conductivity measuring systems acc. to ISO. | Details |
| 50081904 | Calibration solution 1.406 mS/cm500 ml, reference temperature 25oC. Precision solution referred to SRM of NIST. With temp. table for qualified calibration of conductivity measuring systems acc. to ISO | Details |
| 50081905 | calibration solution500 ml, reference temperature 25oC. Precision solution referred to SRM to NIST. With temp. table for qualified calibration of conductivity measuring systems acc. to ISO | Details |
| 50081906 | calibration solution500 ml, reference temperature 25oC. Precision solution referred to SRM of NIST. With temp. table for qualified calibration of conductivity measuring systems acc. to ISO | Details |
| 50004201 | Flow-through mounting accessoryfor conductivity cells with G1" BSP Material: SS316; Connection: DN20 Range: max 160oC; max. 12bar at 20oC | Details |
| 50033772 | Flow-through mounting accessoryfor conductivity sensors with G1" BSP Material: PP; Connection: G 1/2" Range: max 90oC; max. 6bar at 20oC | Details |
Configurator / Comparison
Accessories / Spare parts
A
Source:Endress+Hauserpublic information from the website
Measuring principle video
Click to playManuals & Documents 4
All documents for this modelCase Studies
Municipal Wastewater Treatment · conductivity — 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 conductivity; the focus is measuring conductivity to judge water purity or chemical concentration.
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 choosing two- or four-electrode cells by range and corrosivity.
Implementation
The scope ran through the analyser range: selecting as part of a complete water-analysis system. Technically it hinges on choosing two- or four-electrode cells by range and corrosivity, and on these requirements: stable compliance with Grade 1A discharge limits and online data reporting.
Customer Benefit
In practice this means stable concentration control and less reagent and discharge waste, which cut the workload on the site maintenance team.
Food & Beverage · conductivity — Application Case
Project Background
The project covers dosing, pasteurising, filling and CIP stages. The work centres on conductivity and the core task is measuring conductivity to judge water purity or chemical concentration.
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 conductivity cannot be specified generically — it calls for choosing two- or four-electrode cells by range and corrosivity.
Solution
The Ainstru engineering team worked through the analyser range: selecting as part of a complete water-analysis system. The configuration involves choosing two- or four-electrode cells by range and corrosivity, 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 stable concentration control and less reagent and discharge waste.
Chemical & Pharmaceutical · conductivity — Application Case
Project Overview
The site is reactors, metering vessels and finished-product tanks. The customer wanted conductivity properly configured on the existing plant, with the aim of measuring conductivity to judge water purity or chemical concentration.
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 conductivity configuration has to involve choosing two- or four-electrode cells by range and corrosivity.
Configuration
Supply and installation were organised through the analyser range: selecting as part of a complete water-analysis system. On site this meant choosing two- or four-electrode cells by range and corrosivity, checked line by line against: Ex certification and GMP traceability of records.
Performance
After commissioning the outcome is stable concentration control and less reagent and discharge waste, and the readings are now used for process tuning.
Power & Energy · conductivity — 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 measuring conductivity to judge water purity or chemical concentration.
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 choosing two- or four-electrode cells by range and corrosivity.
What We Did
We took a analyser range approach — selecting as part of a complete water-analysis system. Delivery was built around choosing two- or four-electrode cells by range and corrosivity, with point-by-point checks on: compliance with power-industry codes and unit availability targets.
Operating Outcome
In service the system performs as intended — stable concentration control and less reagent and discharge waste, with routine maintenance falling noticeably.
