Photos ADA-61

 

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The device is developed in 1963 as a closed circuit rebreather with regeneration of an exhaled gas mix and is intended for long stay on small depths and short-term stay on depth up to 40 meters. Long stay under water is provided with a large volume of regenerative substance O3 (3,3 kg), HPI (1,2 kg), and also a stock of the compressed oxygen and a nitrox mix. Specificity of application for the device has demanded it to work without bubbles on a constant depth. Structurally this has been achieved by  switching the cartridges automatically. The device has no rigid case, it is made of non magnetic materials.
Photo and text thanks to Valery Mukhin!
If you have any additional information of this unit please let me know!

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