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Liquid Analysis Liquid Analysis
Digital conductive conductivity sensor Digital conductive conductivity sensor

CLS21D is a digital conductivity probe with high chemical, thermal and mechanical stability.

Condumax CLS21D

Name: Condumax CLS21D
Brand: Endress+Hauser
Availability: InStock

CLS21D

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This product is no longer available.

Please check new generation in the section predecessor / successor or contact your local Endress+Hauser entity.

Digital conductivity sensor
Condumax CLS21D

Successor

F

L

E

X
Memosens CLS21E

Memosens 2.0 contacting conductivity sensor for surface and drinking water monitoring
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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

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Filter Measuring / Application task

Measuring / Application task

Conductivity

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Measuring principle

Conductive
Application

Water, waste water, process, media separation, industrial water
Characteristic

2-electrode system for application in the middle application range
Measuring range

k=1: 10 µS/cm to 20 mS/cm
Measuring principle

Conductive conductivity cell with graphite electrodes for applications in the middle range
Design

2-electrode system 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

NTC 30K
Ex certification

ATEX, NEPSI, EAC
Connection

Process connection: DN25, DN40, G1, NPT 1"
Cable: Memosens connector CYK10
Ingress protection

IP68 (connector)

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Manuals and Datasheets (9)

Brochures and Catalogs (14)

Approval (18)

Declaration (5)

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Most downloaded

Operating Instruction (BA)

Condumax CLS15D/16D/21D

English version - 06/2022

New version available in English

For contacting conductivity measurement in liquids

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

	EN
01/06/2022
19/08/2020
27/01/2020
10/10/2017
31/07/2016

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Hide older versions

Language:	English
Version:	01/06/2022
File size:	1.5 MB
File name:	BA01147CEN_0722-00.pdf

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Explosion Protection

Product family: CeraGel, CeraLiquid, ConduMax H, ConduMax W, InduMax P, Memosens, Messkabel, OEM, OrbiPac, OrbiPore, OrbiSint, OxyMa x H, OxyMax W, TopHit

English version - 08/2023

New version available in English

Product root: CLS15D-, CLS16D-, CLS21D-, CLS50D-, CLS82D-, COS21D-, COS22D-, COS51D-, COS81D-, CPF81D-, CPF82D-, CPS11D-, CPS12D-, C PS16D-, CPS171D-, CPS41D-, CPS42D-, CPS441D-, CPS471D-, CPS491D-, CPS71D-, CPS72D-, CPS76D-, CPS91D-, CPS92D-, CPS96D-, CYK10-, CYK2 0-, OCLS82D-, OCOS81D-, OPS91D- Region: Canada Approval agency: CSA Protection: IS Cl. I Div. 1

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Language:	English
Version:	30/08/2023
File size:	263.6 KB
File name:	S2_CoFC_80169522_EN.pdf

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46 documents

Technical Information (TI)

Condumax CLS21D/CLS21 Technical Information

Technical Information (TI)

English version - 01/2018

New version available in English

Conductivity sensors, analog or digital with Memosens technology

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

	EN
31/01/2018
31/10/2014
10/09/2012
01/04/2010
01/10/2007

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Language:	English
Version:	31/01/2018
File size:	898.9 KB
File name:	TI00085CEN_1518.pdf

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Operating Instruction (BA)

Condumax CLS15D/16D/21D

Operating Instruction (BA)

English version - 06/2022

New version available in English

For contacting conductivity measurement in liquids

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

	EN
01/06/2022
19/08/2020
27/01/2020
10/10/2017
31/07/2016

Show older versions
Hide older versions

Language:	English
Version:	01/06/2022
File size:	1.5 MB
File name:	BA01147CEN_0722-00.pdf

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Ex Safety Instruction (XA)

Safety instructions Condumax CLS15D, CLS16D, CLS21D

Ex Safety Instruction (XA)

English version - 09/2009

New version available in English

Safety instructions for electrical apparatus for explosion-hazardous
zone 2

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	EN
02/09/2009
01/04/2009

Language:	English
Version:	02/09/2009
File size:	1.4 MB
File name:	XA227CA3_0909.pdf

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Ex Safety Instruction (XA)

CLS50D, CLS50, CLS54, CLS15D, CLS16D, CLS21D, CLS82D

Ex Safety Instruction (XA)

English version - 01/2022

New version available in English

Supplement to: BA00182C, BA01591C, BA01147C, BA01326C
Safety instructions for electrical apparatus in explosion-hazardous
areas
UK II 1G Ex ia IIC T3/T4/T6 Ga

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

	EN
31/01/2022
20/10/2021

Language:	English
Version:	31/01/2022
File size:	459.6 KB
File name:	XA02702CEN_0222-00.pdf

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Ex Safety Instruction (XA)

Safety instructions Condumax CLS15D, CLS16D, CLS21D

Ex Safety Instruction (XA)

English version - 09/2009

New version available in English

Safety instructions for electrical apparatus for explosion-hazardous
areas

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

	EN
02/09/2009
01/07/2008

Language:	English
Version:	02/09/2009
File size:	1.3 MB
File name:	XA085CA3_0909.pdf

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Ex Safety Instruction (XA)

CLS15D, CLS16D, CLS21D, CLS50D, CLS50, CLS54, CLS82D

Ex Safety Instruction (XA)

English version - 03/2022

New version available in English

Safety instructions for electrical equipment in explosion-hazardous
areas
EAC Ex, 0Ex ia IIC T6/T4 Ga X
Supplement to:
BA01147C,BA00182C, BA01591C, BA01326C

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

	EN
01/03/2022
31/03/2021

Language:	English
Version:	01/03/2022
File size:	507 KB
File name:	XA02375CEN_0222-00.pdf

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Special Documentation (SD)

Memoclip

Special Documentation (SD)

English version - 03/2007

New version available in English

Äußere Kennzeichnung von digitalen Sensoren und Kabeln mit
Memosens-Technologie

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	EN
01/03/2007

Language:	English
Version:	01/03/2007
File size:	284.4 KB
File name:	SD124Ca2.pdf

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Fields of Activities (FA)

Catálogo Portfolio Analítica

Fields of Activities (FA)

Spanish version - 01/2017

New version available in English

Desde sensores hasta soluciones completas

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Language:	Spanish
Version:	12/01/2017
File size:	1.5 MB
File name:	FA01018CES_Portfolio_Analitica_0216.pdf

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Fields of Activities (FA)

Jistota v analýze kapalin

Fields of Activities (FA)

Czech version - 01/2017

New version available in English

Od senzorů po kompletní dodávku na klíč

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Language:	Czech
Version:	12/01/2017
File size:	740.3 KB
File name:	Analyza_FA01018Ccs_0216.pdf

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Fields of Activities (FA)

Esperti nell’analisi dei liquidi

Fields of Activities (FA)

Italian version - 01/2017

New version available in English

Dai sensori singoli a soluzioni
complete “chiavi in mano”

Show details Hide details

Language:	Italian
Version:	12/01/2017
File size:	3.9 MB
File name:	FA01018CIT_02.16.pdf

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Accessories (5) 5

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60 spare parts & accessories

Calibration solution CLY11-A, 74,0 uS/cm

Order code

50081902
Calibration solution CLY11-B,149,6 uS/cm

Order code

50081903
Calibration solution CLY11-C,1,406mS/cm

Order code

50081904
Calibration solution CLY11-D,12,64 mS/cm

Order code

50081905
Calibration solution CLY11-E,107,00mS/cm

Order code

50081906

Condumax CLS21D

Successor

Memosens CLS21E

Measuring principle

Application

Characteristic

Measuring range

Measuring principle

Design

Material

Dimension

Process temperature

Process pressure

Temperature sensor

Ex certification

Connection

Ingress protection

Back

Condumax CLS15D/16D/21D

Product family: CeraGel, CeraLiquid, ConduMax H, ConduMax W, InduMax P, Memosens, Messkabel, OEM, OrbiPac, OrbiPore, OrbiSint, OxyMa x H, OxyMax W, TopHit

Condumax CLS21D/CLS21 Technical Information

Condumax CLS15D/16D/21D

Safety instructions Condumax CLS15D, CLS16D, CLS21D

CLS50D, CLS50, CLS54, CLS15D, CLS16D, CLS21D, CLS82D

Safety instructions Condumax CLS15D, CLS16D, CLS21D

CLS15D, CLS16D, CLS21D, CLS50D, CLS50, CLS54, CLS82D

Memoclip

Catálogo Portfolio Analítica

Jistota v analýze kapalin

Esperti nell’analisi dei liquidi

Back

Calibration solution CLY11-A, 74,0 uS/cm

Calibration solution CLY11-B,149,6 uS/cm

Calibration solution CLY11-C,1,406mS/cm

Calibration solution CLY11-D,12,64 mS/cm

Calibration solution CLY11-E,107,00mS/cm

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