OUSAF11

Summary

Product identification

The OUSAF11 is an optical sensor designed for measuring VIS/NIR absorption of liquids. It is part of the Endress + Hauser Liquid Analysis product line.

Application

This sensor is used for:

• Interphase detection
• Applications in the food and beverage industry, including:
  • Milk detection in CIP solutions
  • Phase separation (e.g., milk/water)
  • Product loss detection in outlets
• Measurement of solids in:
  • Primary industry
  • Mining

Your benefits

• Cost savings and less product loss: Achieved through fast interphase detection.
• High degree of product safety: Features a non-glass, robust, and hygienic design with FDA-compliant materials and 3-A certification. It is also CIP/SIP-resistant.
• Easy maintenance: Saves time and costs.
• Flexibility:
  • Submersible sensor for open tanks and basins.
  • Insertion sensor with Triclamp or Varivent connection for hygienic applications in pipes and vessels.
  • Color-independent measurement with an optional NIR detector.

Operating limits

• Operating temperature range (sensor): 0 to 90 °C (32 to 190 °F)
• Ambient temperature range: 0 to 55 °C (32 to 130 °F)
• Storage temperature: -20 to +70 °C (0 to 160 °F)
• Humidity: 5 to 95 %
• Process pressure: Max. 10 bar (150 psi) absolute, at 20 °C (68 °F) (for versions with Tri-Clamp or VARIVENT process connection)
• Process temperature (max. short term): 130 °C (266 °F) for 2 hours

Feed water

• Measured variable: VIS/NIR absorption
• Measuring range: 0 to 3 AU (Absorbance Units) or 0 to 6 OD (Optical Density) depending on the optical path length.
• Wavelength: NIR, broadband (VIS and NIR)
• Optical path length: 5 or 10 mm

Electrical

• Power supply: Supplied via sensor fixed cable from the transmitter.
• Lamp voltage: 4.9 ± 0.1 V
• Maximum cable length: 100 m (330 ft)

Mechanical / hydraulic

• Weight: Approx. 0.8 kg (1.8 lbs)
• Materials:
  • Sensor head: FEP (Fluorinated ethylene propylene)
  • Sensor shaft: Stainless steel 316L
  • O-ring: EPDM
  • Cable connection ends: Nickel-plated brass
• Process connections (version dependent):
  • Thread G1
  • NPT 1" thread
  • Tri-Clamp (2", 2.5", 3")
  • VARIVENT N DN40-125
• Light source: Incandescent lamp
• Lamp operating life: Typically 10,000 h
• Detector: VIS/NIR silicon detectors, hermetically sealed
• Filter: NIR or broadband filter, integrated in detector
• Degree of protection: IP 67 (NEMA 4) for all optical parts; IP 68 when mounting with CYH112.

Installation

• The sensor can be installed up to the horizontal in an assembly, support, or suitable process connection. Other angles of inclination are not recommended.
• Avoid vertical installation through the floor of a pipe to prevent sedimentation.
• For pipe installations, the pipe diameter must be at least 50 mm (2").
• Install in locations with consistent flow conditions, preferably in the ascending pipe.
• Avoid areas where air pockets, foam bubbles can form, or where suspended particles can settle.
• Align the sensor so that the medium flows through the measuring gap for a self-cleaning effect.
• Permitted mounting angle: 0 to 180°.

Certificates and approvals

• CE mark
• FDA conformity (non-metal parts in contact with medium meet FDA 21 CFR 177.2600; USP <87> and <88> Class VI)
• 3-A certified for versions with Tri-Clamp and Varivent process connections.

Disclaimer: This extraction may miss figures, footnotes, or revisions. Contractual data must match the OEM PDF revision used on the project.

Official datasheet (PDF)

Lenntech datasheet mirror