Industrial vacuum lines can be under multiple states. They can be either under vacuum or they can see neutral or process gas circulation. 

We are looking for a solution to discriminate the 3 states: Vacuum, Nitrogen or Process gas. 

At this stage it is not necessary to identify the nature of the gases, however, this information can be useful for future applications. Ideally, the solution can be implemented as an external probe attached to the pipe. 

It can be integrated as an additional element in the vacuum line as well.

The customer remains confidential.