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Alphasense Oxygen sensors use capillary flow control.

Unlike partial pressure oxygen sensors, they have good pressure and temperature dependence, making them the best choice in safety applications.

Standard galavanic sensors use lead for greatest reliability but fixed lifetime. The new LFO2-A4 lead free A-series sensor requires continuous biasing but offers longer lifetime.


Sensors are available in three sizes:

A: 20mm diameter, the industry standard size for portable gas detectors

C: 20mm diameter, extra height allows additional filter material when measuring combustion gases

G: Miniature, proven long-term performance. The sensors are designed for the next generation of portable gas detectors. Part of the Alphasense ‘D‘ family.

Application notes

Download Oxygen Application Notes – see application notes for full details.

Sensor Specification Summary

Compare Alphasense Oxygen sensors – sensor specification summary.

Data sheets

Go to downloads page

File Name Description Type Download Link
O2-G2 Low profile, 2 year Data Sheet
O2-G1 Low profile, 1 year Data Sheet
O2-C2 Combustion, 2 year Data Sheet
O2-A3 Small, 3 year Data Sheet
O2-A2 Small, 2 year Data Sheet
O2-A1 Small, 1 year Data Sheet
LFO2-A4 Lead Free, long life Data Sheet


Staying at the forefront of sensor technology guarantees the best solutions for our customers



Each and every sensor is manufactured to the highest standards and tested for long-term reliability



Through investment and innovation we strive to exceed environmental and legislative targets


Download Data Sheets

Get data on our sensors Download Data Sheets

Download Application Notes

Get technical information Download Application Notes


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