The OUSAF11 uses NIR/VIS absorption measurement to detect changes in the optical properties of a liquid. This allows the sensor to identify phase transitions and suspended solids without using a glass optical window.
The sensor can be installed inline in pipes and vessels for phase detection and product-loss monitoring. It can also be used as an immersion sensor in open tanks and basins, including effluent monitoring applications.
A key characteristic of the OUSAF11 is its glass-free hygienic sensor design. The sensor head uses FEP, while the sensor body is stainless steel 316L and the O-ring is EPDM. The design is suitable for demanding process conditions and supports CIP and SIP applications.
The current Endress+Hauser specifications list a measuring range of 0 to 3 AU / 0 to 6 OD, depending on optical path length. Continuous process temperature is 0 to 90 °C, with a maximum of 130 °C for 2 hours. Maximum process pressure is 10 bar absolute at 20 °C.
Key Features
- NIR/VIS absorption measurement for phase detection and suspended solids
- Glass-free optical sensor design
- Measuring range 0 to 3 AU
- Up to 0 to 6 OD, depending on optical path length
- Continuous process temperature 0 to 90 °C
- Maximum 130 °C for 2 hours
- Maximum process pressure 10 bar abs at 20 °C
- Sensor head made of FEP
- Sensor body made of 316L stainless steel
- EPDM O-ring
- IP67 protection
- IP68 when mounted with CYH112
- Supports inline and immersion installation
- Process connections include G1, NPT 1", Tri-Clamp 2"/2.5"/3" and VARIVENT N DN40-125
- Suitable for CIP and SIP
- FDA and 3-A approvals listed by Endress+Hauser
- Resistant to aggressive chemicals and fouling
Suitable Applications
Phase Detection in Food and Beverage
OUSAF11 can detect changing product phases in food and beverage processes, helping identify transitions between products, cleaning solutions and other process liquids.
Milk Detection in CIP Solutions
The sensor can detect milk in CIP solutions, helping operators identify product carryover and optimize cleaning or product recovery processes.
Dairy and Brewery Applications
OUSAF11 is suitable for phase separation detection in dairies and breweries, where fast identification of product interfaces can help reduce product loss.
Product Loss Detection
The sensor can detect product loss in effluent streams, providing a way to monitor valuable product entering wastewater or other discharge streams.
Suspended Solids Measurement
Endress+Hauser also lists suspended solids measurement as an application, particularly for primary industries, mining and metals.
Open Tank and Effluent Monitoring
For open tanks and basins, OUSAF11 can be installed as an immersion sensor for effluent monitoring. The official installation options include Flexdip CYA112 and CYH112 assemblies.
Selection Notes
The OUSAF11 should be selected when the application requires optical phase detection or suspended solids measurement, rather than conventional turbidity measurement.
The optical path length is an important selection factor because the available optical density range depends on the selected path length. The official specification lists 0 to 3 AU and 0 to 6 OD depending on optical path length.
For hygienic applications, confirm the required process connection and certification. Available connections include Tri-Clamp and VARIVENT, while Endress+Hauser lists FDA and 3-A approvals for the sensor.
For immersion installations, confirm the required holder and assembly system, such as Flexdip CYA112/CYH112. IP68 protection applies when the sensor is mounted with CYH112; the sensor itself is specified as IP67.
When ordering, the exact optical path length, process connection, installation arrangement and application should be confirmed because these affect the final configuration.
FAQ
What is the Endress+Hauser OUSAF11?
The OUSAF11 is a glass-free NIR/VIS absorption sensor for detecting changing phases and suspended solids in liquid processes.
What does the OUSAF11 measure?
It is used for phase detection and suspended solids measurement. Official applications also include milk detection, product interface detection and product-loss detection.
What is the measuring range of OUSAF11?
The official specification gives 0 to 3 AU and 0 to 6 OD, with the available optical density range depending on the optical path length.
What is the maximum process temperature?
The continuous process temperature range is 0 to 90 °C. The sensor can withstand 130 °C for up to 2 hours.
What is the maximum process pressure?
The maximum process pressure is 10 bar absolute at 20 °C.
Is the OUSAF11 suitable for hygienic applications?
Yes. The sensor has a glass-free hygienic design and supports CIP and SIP. Endress+Hauser lists FDA and 3-A approvals.
What process connections are available?
The official specifications list G1, NPT 1", Tri-Clamp 2"/2.5"/3" and VARIVENT N DN40-125.
Can OUSAF11 be used in open tanks?
Yes. It can be used as an immersion sensor in open tanks and basins. Endress+Hauser lists Flexdip CYA112 and CYH112 installation systems for this type of application.
What materials are used in the OUSAF11?
The official specification lists FEP for the sensor head, 316L stainless steel for the sensor body and EPDM for the O-ring.
Is OUSAF11 a turbidity sensor?
Not exactly. OUSAF11 is an NIR/VIS absorption sensor primarily intended for phase detection and suspended solids measurement. It should not be presented simply as a conventional turbidity sensor.
