GL45 modified for degasing

I modified a GL45 standard cap to be able to degas a solution of Iron(II) for my thesis. their is one entry of N2 (or any other degasing gaz) and one outlet. with standard tubes connected to their inlet.

The big hole in the middle is used for a oxymeter and the device is secured and tight using a O-ring joint tightend between the screwed cap and the entrance of the oxymeter probe.