Quote: (Originally Posted by
robertkarlsson)
Hello again,
Thankyou Ben and Alex for clearing that out for me. I got a bit grumpy and when i look at it now it was almost a flame.
Just got my hopes up it was an real community driven open rebreather design free for all to use and implement. Sorry about that.
Even still, i think your work on the open rebreather contributes allot. The data that have been released is very valuable for us who are planing to make/modify our own rebreather some day.
All this information about sensors and solenoid / micro valves have been invaluable for me.
While on the topic, have you by any chance looked on zirconium based
sensors like for instance:
http://www.sensortechnics.com/download/xya-637.pdfYes, we have done a lot of work with Zirconia sensors.
The problems are they operate at high temperature internally, which takes power (a couple of amps) but also is highly dependent on the gas and pressure. Helium conducts heat so much better than air, and water even more so.
Another problem is because the sensing element is suspended on wires, to allow the element to heat up, it is very sensitive to shock. Drop a unit on the ground, and you get many hundreds of G force.
Alex