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S423/C/OPT is an oxygen measuring sensor with integrated temperature probe
Technical specifications 
Measuring range0.00 to Measuring range 20.00 mg/L 0-200%
Measuring methodOptical measure by luminescence
Precision±0.1mg/L or ±1 %
Response90% of the value in less than 60 second
Refresh time< 1 second
Temp. compensationwith internal NTC probe
Operating temperature-10 ÷ 60°C (optional -10÷ 80°C )
Maximum pressure5 bar
Body materiaAISI 316 (PVC body optional)
Electrode materialSpecial optical glasses
O-RingsNBR and Silicon
Mechanical protectionIP68 Sensor + cable
Power supply12 ÷ 24Vdc
Power consumptionmax. 2W
Cable10m integral with the sensor (other on request)
Signal interfaceRS 485 Modbus RTU Protocol


SE 740

Optical Oxygen Sensor

Optical oxygen measurement based on fluorescence quenching technology

Facts and Features

  • Flow-independent measuring principle
  • No polarization required
  • Replaceable sensor cap
  • Integrated wear monitoring
  • Stainless steel 1.4435
    Inspection Certificate 3.1,
    Ra < 0.4 μm
  • FDA compliant materials
  • Digital communication

Flow-independent optical oxygen sensor with fast response. Ideal for measurements in demanding hygienic environments.
Steam-sterilizable, autoclavable, and CIP-capable.

Food, pharmaceutics, fermentation, and process

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