MEG o2 Sensor

teomannaskali

I have been examning pictures of the meg head. And I have a question. Do the O2 sensors separate the inhale and the exhale sides? I mean does the loop rely on the o ring on the sensors to keep airtight?

If you would leave one of the sensors out then the here wolud be a hole where the gas can bypass the scrubber right? Or am I just not looking at the pics correctly.

How healthy is it to rely on the thread on the cells, are they backed up or can they just pop out.

Just out of curiosity...

Thanks

Teoman

Gibbon

Yes the sensors separate the inhale and exhale sides of the loop, so yes the o-ring is part of this.

If you left a sensor out there would be a significant and low resistance path around the scrubber compromising the loop- it would not be a good idea!!

There is no risk of the cells poping out, and the o-ring is trapped so there is little risk of that getting lost either.

I do suspect that the design was based on a radial scrubber rather than the axial one, as in the scenario of a flood, it is possible to create a pressure differential across the cells.

How exactly one could/should test the integrity of the various seals between the two sides of the loop is a question that I would like an answer to though, as there should not be a pressure differential placed across the cells - so how and when can you test that the head is not leaking between the two sides of the loop??

RonMicjan

part of your predive checks include doing a positive and negative check on the sensor carriage, (item #19) this will show up any defects in the orings on the sensors and also the seating O rings on the top and bottom of the sensor carriage. You would not dive without 3 sensors in the carriage in any circumstance.

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