Cambridge Sensotec, experts in gas analysis, have been producing the Rapidox range of gas analysers for over 17 years. 

Dynamic and flexible, the company initially specialised in oxygen (O2) analysis, however expanded into multiple gases to suit customer requirements and application demands.

The Rapidox 1100 and Rapidox 2100 range of O2 analysers are particularly suitable for applications such as inert gas blanketing, additive manufacturing, glove boxes, metal heat treatment and research and development projects.

There are two types of O2 sensors used in the Rapidox gas analyse range, these include zirconia and electrochemical, although the majority of the Rapidox gas analysers use a zirconia-based sensor.

What’s the difference between electrochemical and zirconia sensors?


A zirconia O2 sensor is ideal for the analysis of O2 within high temperature applications or metal heat treatment. Zirconia sensors can also be used to detect vacuum leaks within chambers or glove boxes. The sensor has a very fast response time combined with extremely accurate readings at low O2 levels, which is suitable for low ppm to 100% gas analysis.


An electrochemical sensor is best suited to applications where explosive gases are present such as hydrocarbons, or where there is a presence of volatile organic gases compounds (VOCs). They also perform well in helium and hydrogen (H2) and are suited for use in hazardous areas. Electrochemical sensors are available for O2 analysis on a scale of either 0.1ppm to 1% or 0-100%.

Source: Cambridge Sensotec