April 9th, 2012

Button Gauge Gets Safer

By

Last year we decided to make some changes to the Button Gauge: it needed the same safety features as a hose SPG – a pressure relief valve. It took longer than expected, but it’s now back in stock. I feel this is an important feature especially because of the abuse this little gauge is exposed to. It’s most common application is on decompression bottles and rebreather bailout bottles. Applications where close gas monitoring is not important, but rather monitoring if the tank if full or needs filling.

This application usually means pressurize the cylinder, check everything, then turn the gas off to prevent loss thru regulator free-flow concerns. If the pressure drops on the cylinder the regulator can fill with water including the SPG, this can damage the gauge and regulator. This happens more often than divers will admit. Another area of abuse is exposure by mounting the gauge on the top of the regulator of a decompression or bailout bottle where it can be bumped, hit and anything else you can imagine. I see many guys will now mount a button gauge on the bottom side of the regulator to protect it. Since it is only used to check starting and ending pressures tucking it away on the underside keeps it out of harms way.

Safe diving,

Lamar

April 2nd, 2012

O2ptima Rev D Electronics – Battery Recommendation

By

The O2ptima Rebreather Rev D electronics must run on rechargeable batteries that come with the unit, but you can power the Rev C secondary on a non-rechargeable 3.6v lithium or high quality alkaline battery. The non-rechargeable lithium battery will last for up to 20 hours in the secondary and the alkaline should be changed when you change the cartridge.

Apply the same rule to the Rev D electronics: put a fresh, rechargeable battery in when you change a cartridge and set the low voltage warning at 3.3v on the Rev D primary.

Lamar