I've been using an Analox ATA I picked up on eBay which was made for Dive Rite so in a red box! It came with a flow restrictor for a standard LPI.
No problems with it in the past 12 months..but when I was completing a Trimix Instructor course in Sharm they had been having problems with an ATA after sending it back to analox it was returned and similar problems developed so I guess it could be luck of the draw with an individual unit - although the ATA comes in what looks like a nic hard diver proof box I dont think it likes being thrown around a boat a lot! I think this was the problem with the one in Sharm as it was always dodgy connection problems inside the unit. I keep mine in my compressor/blending room and there it stays I have divers analyse there before we take the mix diving. They can then recheck the O2 on the boat before a dive if they like with a portable E0II which tend to be Ok on boats - providing it doesn't get dropped in the drink!
