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Color sensor OUSAF22

NIR/VIS absorption sensor for color and purity monitoring

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Color sensor OUSAF22

NIR/VIS absorption sensor for color and purity monitoring

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Benefits

  • Accurate color and purity monitoring for better product quality
  • Fast and direct inline measurement avoids expensive sampling and laboratory measurements
  • Values according to standard color scales (APHA/Hazen, etc.)
  • Low-maintenance sensor with long service life and stable operation
  • Outstanding filter performance provides highest linearity
  • Suitable for cleaning-in-place (CIP) and sterilization-in-place (SIP)
  • Approved for hazardous area use
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Color sensor OUSAF22

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Manufacturer's warranty

Engineered for confidence

Our instruments are designed for long‑lasting performance, precise measurement, and dependable operation in demanding industrial environments. Each product includes a standard manufacturer’s warranty that reflects our commitment to quality and to the trust you place in our solutions.

Should a warranty case occur, the device will be assessed and the applicable remedy will be provided in line with the warranty terms – helping ensure a reliable and efficient resolution and supporting continued operation of your measurement point.

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If you require extended warranty coverage, simply contact your local Endress+Hauser representative. Our experts will advise you on the available options to match your application and risk profile, helping you protect your investment, reduce unexpected repair costs, and ensure reliable long‑term operation beyond the manufacturer's warranty period.

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Warranty terms apply

The manufacturer's warranty and extended warranty are subject to specific conditions. For full details, please refer to the locally applicable General Terms and Conditions (GTC), which can be found on the respective country page of our website.

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With deep field expertise, harmonized processes, and continuous monitoring, we accompany you with comprehensive service offerings – from initial start‑up through instrumentation maintenance to process optimization – as a true lifetime partner delivering improved outcomes.

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Product information

The OUSAF22 NIR/VIS absorption sensor monitors color and purity in Ex areas and hygienic processes.
Color sensor
Specifications
Measuring / Application task Concentration
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Description

OUSAF22 is an optical sensor for precise inline color measurement in liquids in the visible region of the electromagnetic spectrum. It measures the slightest color changes, ensuring the highest quality standards of your products. Moreover, it provides you with fast values according to all standard color scales and avoids complicated and expensive sampling. OUSAF22 is ready for all kinds of environments, from hazardous areas (ATEX, FM) to hygienic processes (CIP/SIP).

Field of application

The OUSAF22 sensor measures color for:

  • Quality control / Purity monitoring
  • Color dosage
  • Decolorization control
  • Distillation monitoring

This makes it fit for many industries such as

  • Life Sciences
  • Chemicals
  • Food & Beverages
  • Oil & Gas
  • Water

Color scale measurements: APHA/Hazen, Pt, EBC, ASBC, ASTM, ICUMSA, Lovibond

With its international explosion-protection approvals, such as ATEX and FM, the sensor is suitable for hazardous area use.

Benefits
  • Accurate color and purity monitoring for better product quality
  • Fast and direct inline measurement avoids expensive sampling and laboratory measurements
  • Values according to standard color scales (APHA/Hazen, etc.)
  • Low-maintenance sensor with long service life and stable operation
  • Outstanding filter performance provides highest linearity
  • Suitable for cleaning-in-place (CIP) and sterilization-in-place (SIP)
  • Approved for hazardous area use
Downloads
Most downloaded
Technical Information (TI)
OUSAF22 Technical Information Optical sensor combined with the OUA260 flow assembly for the
measurement of color concentrations
English version - 03/2016
Download
Operating Instruction (BA)
OUSAF22 Operating Instructions Optical sensor for measuring color concentrations
English version - 03/2016
Download
Operating Instruction (BA)
Operating Instructions Model OUM980 / Model OUSAF22 Model OUM980 Photometric Analyzer/
Model OUSAF22 Dual Beam Inline Color Sensor- Analyzer/Sensor to measure
Spectral Absorbance
English version - 10/2009
Download
The CAD Drawings will be available after the configuration.
All downloads
22 Downloads
Technical Information (TI)
Most downloaded
OUSAF22 Technical Information Optical sensor combined with the OUA260 flow assembly for the
measurement of color concentrations
English version - 03/2016
Download
Operating Instruction (BA)
Operating Instructions Model OUM980 / Model OUSAF22 Model OUM980 Photometric Analyzer/
Model OUSAF22 Dual Beam Inline Color Sensor- Analyzer/Sensor to measure
Spectral Absorbance
English version - 10/2009
Download
Operating Instruction (BA)
Most downloaded
OUSAF22 Operating Instructions Optical sensor for measuring color concentrations
English version - 03/2016
Download
Installation Instructions (EA)
Operation instruction for Kits OUSAFxx explosion proof lamps Operation instruction for Kits OUSAFxx explosion proof lamps
English version - 03/2026
Download
Ex Safety Instruction (XA)
XA OUSAF12, OUSAF21, OUSAF22, OUSAF44, OUSAF46, OUSTF10 Process photometer sensors
UK Ex II 2G Ex db IIC T5 Gb
English version - 07/2026
Download
Ex Safety Instruction (XA)
XA OUSAF12, OUSAF21, OUSAF22, OUSAF44, OUSAF46, OUSTF10 Process photometer
ATEX II 2G Ex db IIC T5 Gb
FM Cl.1, Div. 1, Groups B, C, D
English version - 06/2026
Download
Competence Brochure (CP)
Photomètres de process Expertise en analyses physico-chimiques
French version - 09/2016
Download
Competence Brochure (CP)
プロセスフォトメータ 水質分析に関する高度な専門知識
Japanese version - 04/2024
Download
Competence Brochure (CP)
Prozessphotometer Kompetenz in der Flüssigkeitsanalyse
German version - 09/2016
Download
Competence Brochure (CP)
Fotómetros para procesos Experiencia en análisis de líquidos
Spanish version - 01/2015
Download
Case Study (CS)
C0362C In-line Sensor Provides Continuous Color Monitoring OUSAF22 In-line maximizes in-line quality for optimum process and
product control and productivity
English version - 06/2010
Download
Innovation (IN)
The color expert Optical sensor OUSAF22 for precise inline color measurement in liquids
English version - 05/2013
Download
Innovation (IN)
OUSAF22 Der Farbexperte Optischer Sensor OUSAF22 für genaue Inline-Farbmessung in
Flüssigkeiten
German version - 05/2013
Download
AI (Application note)
High-quality sugar and no bittersweet suprise Inline quality measurement in sugar production
English version - 01/2021
Download
AI (Application note)
Guter Zucker und keine bittersüße Überraschung Inline-Qualitätsmessung in der Zuckerproduktion
German version - 01/2021
Download
Manufacturer Declaration
Product family: Absorbance, Turbidity and total suspended solids, UV Product root: OUSAF12-, OUSAF21-, OUSAF22-, OUSAF44-, OUSAF46-, OUSTF10-
Declaration number: HE_00272_03.22
Manufacturer specification: Explosion protection
Additional information: Simple Electrical Apparatus
English version - 07/2022
Download
EU Declaration
Product family: Absorbance, Cell growth, Turbidity and total suspended solids, UV Product root: OUSAF11-, OUSAF12-, OUSAF21-, OUSAF22-, OUSAF44-, OUSAF46-, OUSTF10-
Declaration number: EC_00245_04.23
English version - 01/2023
Download
UK Conformity Assessed
Product family: Absorbance, Cell growth, Turbidity and total suspended solids, UV Product root: OUSAF11-, OUSAF12-, OUSAF21-, OUSAF22-, OUSAF44-, OUSAF46-, OUSTF10-
Declaration number: UK_00499_03.23
English version - 01/2023
Download
Miscellaneous
Product family: Absorbance, Cell growth, Isemax, Liquiport, Liquistation M, Memosens, New analyzer platform, OxyMax W, Spectrometer, Turbidity and total suspended solids, Turbimax, UV Product root: CA80AL-, CA80AM-, CA80COD-, CA80CR-, CA80FE-, CA80HA-, CA80NO-, CA80PH-, CA80SI-, CA80TN-, CA80TP-, CAS40D-, CAS80E-,
COS22E-, COS41-, COS51E-, COS61-, COS61D-, COS81E-, CSF48-, CSP44-, CUS50D-, CUS51D-, CUS52D-, OUSAF11-, OUSAF12-, OUSAF21-, OUSAF22
-, OUSAF46-, OUSBT66-, OUSTF10-
Region: Eurasian Economic Union
Approval agency: T-Standard
Approval number: ЕАЭС KZ 7500525.13.12.00620
Russian version - 03/2025
Download
Miscellaneous
Product family: Absorbance, Cell growth, Isemax, Liquiport, Liquistation M, Memosens, New analyzer platform, OxyMax W, Spectrometer, Turbidity and total suspended solids, Turbimax, UV Product root: CA80AL-, CA80AM-, CA80COD-, CA80CR-, CA80FE-, CA80HA-, CA80NO-, CA80PH-, CA80SI-, CA80TN-, CA80TP-, CAS40D-, CAS80E-,
COS22E-, COS41-, COS51E-, COS61-, COS61D-, COS81E-, CSF48-, CSP44-, CUS50D-, CUS51D-, CUS52D-, OUSAF11-, OUSAF12-, OUSAF21-, OUSAF22
-, OUSAF46-, OUSBT66-, OUSTF10-
Region: Eurasian Economic Union
Approval agency: T-Standard
Approval number: ЕАЭС KZ 7500525.13.12.00638
Russian version - 02/2025
Download
Explosion Protection
Product family: Absorbance, Turbidity and total suspended solids, UV Product root: OUSAF12-, OUSAF21-, OUSAF22-, OUSAF44-, OUSAF46-, OUSTF10-
Region: Europe (ATEX)
Approval agency: CSA
Protection: Ex d Cl. II Zone 1
English version - 02/2023
Download
Explosion Protection
Product family: Absorbance, Turbidity and total suspended solids, UV Product root: OUSAF12-, OUSAF21-, OUSAF22-, OUSAF44-, OUSAF46-, OUSTF10-
Region: USA
Approval agency: FM
Protection: Cl. I Div. 1
English version - 02/2016
Download

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The OUSAF22 NIR/VIS absorption sensor monitors color and purity in Ex areas and hygienic processes.
Color sensor

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Color sensor
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Spare parts and accessories

further parts
further parts

KIT OUSAFxx High Luminiscence Lamp

further parts
further parts
Order code 71142977
further parts
further parts

KIT OUSAFxx Gas Filled Lamp

further parts
further parts
Order code 71142978

KIT OUSxFxx Connector Dust Cover

Order code 71210161
Spare parts & accessories

Selection of compatible products