
Specs at a glance
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Measurement range
0 to 20 mg/l
0 to 200 %SAT
0 to 400 hPa -
Process temperature
-5 to 60 °C
(20 to 140 °F) -
Process pressure
Max. 10 bar abs
(Max. 145 psi)
Field of application
Oxymax COS61D is a high-performance, digital oxygen sensor that offers fast, accurate and drift-free measurement. It supports your process with low maintenance, high availability and easy handling. The sensor's long-term stable fluorescence layer is exclusively oxygen-selective (interference-free), ensuring consistently reliable measurement. Thanks to Memosens digital technology, the Oxymax COS61D combines maximum process and data integrity, and facilitates simple lab calibration.
Oxymax COS61D measures the dissolved oxygen concentration in:
Wastewater treatment plants:
- O2 control in the aeration basin
- Process water treatment and monitoringWater works:
- Status monitoring of drinking water (oxygen enrichment, corrosion protection, etc.)
- Water quality monitoring in rivers, lakes or seasUtilities of all industries:
- O2 control in the biological treatment
- Process water treatment and monitoringFish farming:
- O2 control for optimum growth conditions
Benefits
Minimum maintenance, maximum availability
Fast, drift-free measurement for precise aeration control and process monitoring
Long-term stability for increased process safety
Outstanding performance in all aeration processes (SBR, Anamox, etc.)
Chemical-free: no electrolyte handling
Videos
Extended selection
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High-end products
- Highly functional and convenient
Technical excellence
Simplicity

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Standard products
- Reliable, robust and low-maintenance
Technical excellence
Simplicity
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Specialized products
- Designed for demanding applications
Technical excellence
Simplicity
Variable
FLEX selections | Technical excellence | Simplicity |
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Fundamental selection Meet your basic measurement needs |
Technical excellence
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Simplicity
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Lean selection Handle your core processes easily |
Technical excellence
|
Simplicity
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Extended selection Optimize your processes with innovative technologies |
Technical excellence
|
Simplicity
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Xpert selection Master your most challenging applications |
Technical excellence
|
Simplicity
Variable |
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Operating Instruction (BA)
Oxymax COS61D
German version - 12/2021
Sensor für die Messung von gelöstem Sauerstoff Mit Memosens Protokoll
EN 13/12/202119/03/202117/07/201830/09/201621/08/2012Language:
German
Version:
13/12/2021
File size:
2.7 MB
File name:
BA00460CDE_1721-00.pdf
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Operating Instruction (BA)
Operating Instructions - Compressed air cleaning unit - 115VAC
English version - 01/2013
Operating Instructions - Compressed air cleaning unit - 115VAC
Language:
English
Version:
29/01/2013
File size:
1.8 MB
File name:
BA00498CEN_0113.pdf
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Technical Information (TI)
Oxymax COS61D/COS61
Optical sensor for measuring dissolved oxygen
EN 05/01/202219/02/202117/07/201821/08/201207/06/2010Language:
English
Version:
05/01/2022
File size:
1.9 MB
File name:
TI00387CEN_1621-00.pdf
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Operating Instruction (BA)
Oxymax COS61D
Sensor for the measurement of dissolved oxygen With Memosens protocol
EN 13/12/202119/03/202117/07/201830/09/201621/08/2012Language:
English
Version:
13/12/2021
File size:
2.8 MB
File name:
BA00460CEN_1721-00.pdf
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Operating Instruction (BA)
Operating Instructions - Compressed air cleaning unit - 115VAC
Operating Instructions - Compressed air cleaning unit - 115VAC
Language:
English
Version:
29/01/2013
File size:
1.8 MB
File name:
BA00498CEN_0113.pdf
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Short Instruction (KA)
Oxymax COS61D
Optical sensor for measuring dissolved oxygen With Memosens protocol
EN 01/07/202119/03/202117/07/201830/09/201617/08/2012Language:
English
Version:
01/07/2021
File size:
1.6 MB
File name:
KA01133CEN_0521.pdf
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Installation Instructions (EA)
Kit for Oxymax COS61/COS61D
For optical sensors for measuring dissolved oxygen
EN 18/05/2022Language:
English
Version:
18/05/2022
File size:
786.9 KB
File name:
EA01425CEN_0122-00.pdf
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Fields of Activities (FA)
Expertise in liquid analysis
From sensors to complete turnkey solutions
EN 21/09/2022Language:
English
Version:
21/09/2022
File size:
1.2 MB
File name:
FA01018CEN_0422_Analysis_Portfolio_lowres.pdf
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Fields of Activities (FA)
Esperti nell’analisi dei liquidi
Dai sensori singoli a soluzioni complete “chiavi in mano”
Language:
Italian
Version:
12/01/2017
File size:
3.9 MB
File name:
FA01018CIT_02.16.pdf
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Fields of Activities (FA)
Jistota v analýze kapalin
Od senzorů po kompletní dodávku na klíč
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)
Catálogo Portfolio Analítica
Desde sensores hasta soluciones completas
Language:
Spanish
Version:
12/01/2017
File size:
1.5 MB
File name:
FA01018CES_Portfolio_Analitica_0216.pdf
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Competence Brochure (CP)
Damit Ihre Kläranlage läuft und läuft und läuft
Effizienz und Effektivität in der Abwasseraufbereitung
Language:
German
Version:
03/08/2018
File size:
3.4 MB
File name:
CP01197CDE_0118_Damit Ihre Kläranlage läuft.pdf
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Competence Brochure (CP)
Making sure your WWTP runs and runs and runs
Efficient and effective wastewater treatment
Language:
English
Version:
03/08/2018
File size:
3.5 MB
File name:
CP01197CEN_0118_Making sure your WWTP runs.pdf
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Competence Brochure (CP)
For the love of quality water
Fresh ideas for waterworks, distribution networks, surface waters and industrial plants.
Language:
English
Version:
17/06/2019
File size:
3.2 MB
File name:
CP01335CEN_0119_Competence in water.pdf
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Competence Brochure (CP)
Aus Freude an gutem Wasser
Frische Ideen für Wasserwerke, Verteilernetze,Oberflächenwasser und Industrieanlagen
Language:
German
Version:
17/06/2020
File size:
3.2 MB
File name:
CP01335CDE_0119_Kompetenz in Wasser.pdf
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Case Study (CS)
Emmi : faire les choses proprement
Un traitement efficace des eaux usées avec Oxymax COS61D dans le réacteur sequential discontinue (SBR) d’une entreprise laitière
Language:
French
Version:
04/12/2013
File size:
516.5 KB
File name:
CS01347CFR-0113-Emmi.pdf
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Case Study (CS)
Saubere Sache bei Emmi
Effiziente SBR-Kläranlage mit Oxymax COS61D
Language:
German
Version:
04/12/2013
File size:
177.9 KB
File name:
CS01347CDE_0113_COS61D-Emmi.pdf
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Case Study (CS)
Making a clean job of it at Emmi
Efficient SBR wastewater treatment with Oxymax COS61D
Language:
English
Version:
04/12/2013
File size:
1 MB
File name:
CS01347CEN_0113_COS61D-Emmi.pdf
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Case Study (CS)
Monitoring water quality in fish farms
Digitalizing fish farming in the Petite Camargue Alsacienne
Language:
English
Version:
24/09/2021
File size:
699.3 KB
File name:
CS01722X_Monitoring water quality in fish farms.pdf
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Case Study (CS)
Überwachung der Wasserqualität in Fischzuchtbecken
Digitalisierung der Fischzucht in der Petite Camargue Alsacienne
Language:
German
Version:
24/09/2021
File size:
706.6 KB
File name:
CS01722X_Ueberwachung der Wasserqualitaet in Fischbecken.pdf
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Case Study (CS)
Toezicht op de waterkwaliteit in viskwekerijen.
Digitalisering van viskwekerijen in de Petite Camargue Alsacienne
Language:
Dutch
Version:
24/09/2021
File size:
1.2 MB
File name:
Toezicht op de waterkwaliteit in viskwekerijen_CS01722X.pdf
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AI (Application note)
Une brise marine pour tirer la chasse d’eau des toilettes !
Surveillance de la qualité de l’eau de mer avec le Turbimax CUS52D
Language:
French
Version:
20/05/2020
File size:
1.5 MB
File name:
AI01137CFR-0120-Eau-toilettes-HK.pdf
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AI (Application note)
Quality monitoring of seawater with Turbimax CUS52D
Toilet flushing with a fresh sea breeze Quality monitoring of seawater with Turbimax CUS52D
Language:
English
Version:
20/05/2020
File size:
1.1 MB
File name:
AI01137CEN_Seawater for toilet flushing.pdf
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AI (Application note)
Régulation de l’aération sûre et économique
L’analyse en ligne permet d’améliorer les performances
Language:
French
Version:
31/01/2014
File size:
1 MB
File name:
AI01032XFR-0114-Aeration-control.pdf
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AI (Application note)
Qualitätskontrolle von Meerwasser mit Turbimax CUS52D
Toilettenspülung mit frischer Meeresbrise Qualitätskontrolle von Meerwasser mit Turbimax CUS52D
Language:
German
Version:
20/05/2020
File size:
1.3 MB
File name:
AI01137CDE_Meerwasser für die Toliettenspülung.pdf
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Manufacturer Declaration
Product family: OxyMax W
Product root: COS61D- Declaration number: HE_01676_01.22 Manufacturer specification: RoHS Additional information: China-RoHS
EN 27/09/2022Language:
English
Version:
27/09/2022
File size:
387.8 KB
File name:
HE_01676_01.22_COS61D_China-RoHS.pdf
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Manufacturer Declaration
Product family: OxyMax W
Product root: COS61D- Declaration number: HE_01015_01.18 Additional information: DIN EN 61709, MTBF Calculation, SN 29500
EN 26/06/2018Language:
English
Version:
26/06/2018
File size:
54.8 KB
File name:
HE_01015_01.18.pdf
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EU Declaration
Product family: OxyMax W
Product root: COS61D- Declaration number: EC_00156_01.16
EN 14/01/2016Language:
English
Version:
14/01/2016
File size:
28.3 KB
File name:
EC_00156_01.16.pdf
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EU Declaration
Product family: OxyMax W
Product root: COS61D- Declaration number: EC_00156_02.16
EN 01/06/2017Language:
English
Version:
01/06/2017
File size:
244.3 KB
File name:
EC_00156_02.16.pdf
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UK Conformity Assessed
Product family: OxyMax W
Product root: COS61D- Declaration number: UK_00378_01.21
Language:
English
Version:
06/08/2021
File size:
277.3 KB
File name:
UK_00378_1.21 COS61D_nonEx.pdf
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Miscellaneous
Product family: Absorbance, Analog, Cell growth, CeraGel, CeraLiquid, Ceramax, CeraTex, ConduMax H, ConduMax W, InduMax H, InduMax P , Isemax, Memosens, OrbiPac, OrbiPore, OrbiSint, OrbiTex, OxyMax H, OxyMax W, PuriSys, Sensor, Spectrometer, TopHit, Turbidity and t otal suspended solids, Turbimax, UV, Viomax
Product root: CAS40D-, CAS51D-, CCS120-, CCS120D-, CCS50-, CCS50D-, CCS51-, CCS51D-, CCS55D-, CCS58D-, CFS51-, CKF50-, CKI50-, CLS12 -, CLS13-, CLS15-, CLS15D-, CLS16-, CLS16D-, CLS19-, CLS21D-, CLS30-, CLS50-, CLS50D-, CLS54-, CLS54D-, CLS82D-, COS22-, COS22D-, CO S41-, COS51D-, COS61-, COS61D-, COS81D-, CUS50D-, CUS51D-, CUS52D-, CVF52-, CVI52-, OUSAF11-, OUSAF12-, OUSAF21-, OUSAF22-, OUSAF44- , OUSAF46-, OUSBT66-, OUSTF10- Region: Eurasian Economic Union Approval agency: EAC Approval number: EAEC N RU D-DE.PA05.B.03690_22
Language:
Russian
Version:
26/07/2022
File size:
338.6 KB
File name:
EAEC N RU D-DE.PA05.B.03690_22.pdf
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Explosion Protection
Product family: OxyMax W
Product root: COS61D- Region: USA Approval agency: CSA
Language:
English
Version:
09/11/2020
File size:
918.1 KB
File name:
CoFC_70220753_EN incl ControlDrawing.pdf
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