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LuminOx Sealed Optical Oxygen Sensor


The LuminOx Sealed Optical Oxygen Sensor Range Offers Users With Application Requirements To Only Measure Sample Gas At The Front Face Of The Sensor.

The LuminOx Sealed Optical Oxygen Sensor is developed and manufactured by SST, it is part of the LuminOx family, which is a range of factory calibrated oxygen sensors which measure ambient oxygen levels using the principle of luminescence quenching.

The LuminOx Sealed Optical Oxygen Sensor (LOX-02-S) is an extension to the standard range of LuminOx oxygen sensors. It is a similar diffusion type sensor like the original LOX-02 sensor. However, the LOX-02-S has a sealed base that is gas-tight, meaning only the face of the sensor with the protective membrane needs to be in the sample gas environment, externally leaving easy access to the pins of the sensor.

The patented technology allows SST to produce a range of sensors that provides low power operation, while offering a much longer lifetime than electrochemical and galvanic sensors.

The sensors each have an internal sensor for temperature and barometric pressure compensation, meaning the customer does not need to consider this in their design. It also communicates directly to the customers USART so no signal conditioning circuitry is required.

LuminOx is a completely solid state sensor and contains no lead or liquid electrolytes. It is therefore 100% RoHS compliant. It also has virtually no cross sensitivity, allowing it to be used in applications where other technologies are unreliable due to the particular mix of gases present.

The luminescence quenching principle measures the partial pressure of oxygen (ppO2). The internal barometric pressure sensor measurement along with the ppO2 measurement allows an oxygen concentration (O2%) value to be calculated. The USART output allows the sensor to communicate the values of O2%, ppO2, barometric pressure, internal temperature and a sensor status.



Part Numbering Guide


Supply Voltage (Vs) 4.5Vdc to 5.5Vdc
Supply Current (Is) <7.5mA (streaming one sample per second), <20mA Peak
Output Type 3.3V TTL level USART
Temperature Limits
    Operating -30 to +60°C
    Storage -30 to +60°C
Humidity 0-99% Rh (non condensing)
Barometric Pressure Range 500-1200mbar


Oxygen Range 0-25% O2
Oxygen Pressure Range 0-300mbar ppO2
    ppO2 < 2% FS
    Temperature Indication only
    Pressure ±5mbar
    O2 Determined by ppO2 &
pressure accuracy
    ppO2 0.1mbar
    Temperature 0.1°C
    Pressure 1mbar
    O2 0.01%
Lifetime > 5 years


LOX-02-S Technical Drawing


Lox connections
Pin Designation
1 Vs (+5V)
2 GND (0V)
3 3.3V UART Sensor Transmit
4 3.3V UART Sensor Receive


  • Luminescence-based optical technology, NOT electrochemical
  • Factory calibrated
  • Measures temperature and pressure (if selected)
  • Extended temperature range
  • Maintenance free
  • Battery power usage
  • No need for additional electronics
  • Compact in size


  • Compact, diffusion-type housing with sealed base
  • Long life, non-depleting technology
  • Low power
  • High accuracy
  • Low cost
  • RoHS compliant
  • Contains no hazardous materials
  • Full technical and application support available
  • This field is for validation purposes and should be left unchanged.