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LOX-O2 UV Flux 25% Oxygen Smart Sensor

LOX-O2 UV Flux 25% Oxygen Smart Sensor
Regular price $130.00

POs or wholesale quantity discounts click here

The LOX-O2 UV Flux 25% Oxygen Sensor (formerly known as OX-0052) is designed to be used anywhere 0-25% oxygen levels are required. This makes it a valuable safety sensor anywhere inert gases are stored or used.

The sensor benefits from lower power requirements than electrochemical and galvanic sensors, while providing a longer lifetime due to the non-depleting sensing principle.

The LOX-O2 is ppO2 and temperature compensated, enabling linear operation over a wide range without the need for additional system components. It does not contain lead or any other hazardous materials and has negligible cross sensitivity to other gases.


  • Internally temperature compensated, no cross sensitivity
  • Direct communication to UART, no signal conditioning circuitry required
  • Contains no hazardous materials; RoHS & REACH compliant
  • High Accuracy; Maintenance Free


  • LOX-O2 Sensor – for integration into high-volume OEM products or for hobbyists.
  • CM-42950 – O2 25% Smart Sensor w/ MX Board (Same functionality as the development kit without USB cable or software). 
  • CM-42951 – Oxygen Smart Sensor w/ Development Kit
  • Sensor Development Kit (CM-200) - Easy to use, simply plug the sensor into the PCB and plug it into your PC via USB. Use our free GasLab® software to measure and graph carbon dioxide or use our library of source code on Github to build your own application or for OEM batch testing/configuration. Order the sensor on this page, then order the Devkit here.

We recommend that all first time users purchase both this sensor and the CM-200 Development Kit for fastest and easiest results.


  • Measuring Gas: Oxygen
  • Measurement Range: 0.1 to 25% O2
  • Sensing Method: Fluorescence quenching by oxygen
  • Measurement Interval: 1 Sample/second
  • Response Time: < 60 Seconds
  • Warm-Up Time: < 60 Seconds at 72°F (22°C)
  • Accuracy: Better than 2% at full scale
  • Resolution: 0.10% / 0.1mbar
  • Temperature Accuracy: +/- 2 degrees C
  • Operating Temperature: -30°C to +60°C
  • Barometric Pressure Range: 500 to 1200 mbar
  • Lifetime: > 5 years

Electrical / Mechanical

  • Voltage: 4.5 - 5.5 VDC
  • Current: < 6mA (streaming @ 1 Sample/sec), < 17mA Peak
  • Interface: UART or analog


Gas Sensor Development Kit (CM-200)- designed to provide customers with an easy drop-in solution. Includes our free Gaslab data logging software. Sensor sold separately.

Tube Cap Adapter - easily converts a wide range of gas sensors from diffusion applications to sampling. However, If you need a sampling sensor we recommend the LOX-02-F Flow Through Oxygen Sensor with tube caps instead. 

Micro-Pump Kit includes all the tools you need to utilize the tube-cap adapters as part of a sampling sensor system.

Nafion Tubing is a highly selective, semi-permeable membrane to water vapor. If gases inside Nafion tubing are wetter than gases surrounding the tubing, drying will occur. If the surrounding gases are wetter, humidification will occur.

Micro Gas Sampling Pumps provide a constant flow of air across the sensor with a tube cap - perfect for bench-top testing of sensors for closed-loop sampling applications.

  • Data Sheets

  • Manuals

  • Technical Documents

  • Videos

  • Additional Resources

  • Case Studies

Customer Reviews

Based on 5 reviews
Andrew Duff
OX-0052 Sensor

Very good fast service. Thank you

Yohannes Bogale

UV Flux 25% Oxygen Smart Sensor

Phil Chivers
Received, but not yet utilized

We received them. However, we have not fully developed the product we are going to use them with. They have worked on our prototypes, so we are expecting to have any issues with them.

Tony Hickey
UV Flux 25% Oxygen Smart Sensor

Looks great had it working right away. Really well priced and will likely buy more.

Tim Cabbabe
Does Exactly What it Should

Very sensitive meter that "just works" right out of the box. Simple to use, and I expect a long life from it unlike e-chem sensors. Make sure you use 3.3v logic and you'll be streaming ASCII in no time.

"Easy to install, easy to set up, and easy calibration - just what I was looking for."

- Phillip Farrar
Water Plant Superintendent

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