EXspect 231

NIR absorption sensor in compact design

EXspect 231 is a high-precision NIR compact sensor for monitoring production processes in the food and pharmaceutical industries as well as in many areas of further process applications. The robust and compact design in stainless steel housing and the wear-free sapphire windows make the EXspect 231 a reliable absorption sensor with integrated digital measuring amplifier and touch display. Depending on the sensor type, the measuring units can be output in % turbidity, absorption or common turbidity units and a maximum measuring range of 0...6 AU is available, which can be output via the standard interface of 4...20 mA. Two alarm limits can be programmed and different switching outputs are available.

With the EXpert parameterization software, the sensor can be easily adapted to the respective measuring task. Optical filters of the EXcap110 filter series are available for all measuring ranges to check and calibrate the sensor.


Your advantages

  • Compact design with integrated amplifier and touch display
  • %-Absorption / EBC / FAU / mg/l / AU / OD or cusomer defined unit
  • Durable sapphire window
  • Hygienic Design, CIP/SIP-capable
  • LED light source guarantees a durable and stable signal
  • Easy parameterization via display or software EXpert


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Measuring range max.: 0-100 % / 0...6 AU / 0...6600 EBC
Resolution: 0,1 % or 0,01 AU
Accuracy: ± 1 % from measurement value
Reproducibility: ≤ 1 % from final value
Wavelength: 850 nm
Light source: LED
Optical path length: 5, 10 or 20 mm
Material: Stainless steel 1.4435 (316L)
Surface: e-polished Ra <0,37 μm
Window: Sapphire
Supply voltage: 24 V DC
Contact: NO or NC configurable 150 mA
Input contact: zeroing
Process connection: Thread G1/2"
Process temperature: -10... 90 °C, 135 °C max. 1 hour (SIP cycle)
Process pressure: max. 10 bar (150 psi)
Electrical connection: M12 connector 5-pin or 8-pin (digital parameterizable)
Interfaces: 4 ... 20 mA
Parameterization: Software EXpert
Protection class: IP69



  • Reliable phase separation
  • Filter monitoring
  • Separator control
  • Color-independent concentration measurement

Our Optical Sensors

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Sensors - accessories
EXcap 110EXcap 120