Quote: (Originally Posted by
doug allen)
I searched...(not extensively mind ya'll)...this site about this subject and nothing came up immediately....but I do have a question about O2 sensor life.
Anyway....I've had to replace 4 O2 sensors in my rebreather since July 07....seems everytime I fire this sucker up on dive day I get a "Fail" error on one of the three sensors on the Hammerhead.....3 of them have been replaced under warranty...the other one was a spare that I got with the unit....
Has anyone else experienced early failure of O2 sensors this frequently?
Doug,
If you are using the HH, and using AI cells I suggest you choose the MHD version not the MD version as the MHD has a higher guaranteed output.. I find that with the AI cells if they last more than a few weeks they will last for a signifcant time (very little decay), otehrwise they fail quite quickly - many times reading 0mv..
If using Teledyne cells you want cells that are starting off around 9mv since they tend to decay over their life...
I also find that people that have problems with calibration repeatedly in many cases are not doing adequate o2 flushes.. You can try and calibrate with the cells in a baggie and flowing oxygen at a constant low rate..
If you are calibrating at any altitude make sure you select altitude calibration (new handsets only)