Dive Rite (red case) version of the Analox ATA, battery (single AA) powered analyzer.
Brand new O2 sensor (installed 5/13/10), have reciept as proof, good for three years. He sensor 4 years old (good for 10 years, total). Has rubber hose w/qd nipple for attachement to regulator inflator hose for gas testing. Just tested with know trimix gases, was right on target. Includes red cloth case. Seldom used, in mint condition. New price $985, asking $500 plus shipping from St. Pete, FL, or can deliver to cave country on the 22nd.
727/421-8304