closed-circuit breathing

closed-circuit breathing

rebreathing of a contained gas mixture, either directly or after recirculation of the gas through a water-absorbing or carbon dioxide-absorbing unit. An example is breathing through a spirometer.
References in periodicals archive ?
Obtain 16 units in the closed-circuit breathing apparatus, 8 pieces of happiboostereita, eight pieces of electronic testing a series of eight pieces of maintenance and spare sets of 48 pieces of spare filter cartridges, two pieces of the user~s example with the self filter body as well as the use of equipment maintenance training examination and the two-level maintenance training.
As part of the Sobek programme, TNO's Netherlands Organisation for Applied Scientific Research has conducted tests in the Rotterdam port with a passive array of hydrophones and processing algorithms, achieving what is claimed to be the first reported detection of a closed-circuit breathing apparatus-equipped diver in a harbour by passive sonar, at ranges of up to 120 metres in the presence of other targets.
Designed to meet the demands of both portable and ship-borne applications, the Cerberus Mod2 provides improved performance over the Mod1, allowing open- and closed-circuit breathing diver detection respectively at over 900 and 700 metres.
The first known closed-circuit breathing device using stored oxygen and absorption of carbon dioxide by an absorbent (caustic soda) was invented by Henry Fluess in 1879 to rescue mine workers who were trapped by water (Davis, 1955).
Charles Evans and Tom Bourdillon, wearing closed-circuit breathing apparatus, take a break en route to the South Summit, Mount Everest Expedition, May 1953.
The mobile Drger Test-it 6100 test unit allows you to function test self-contained closed-circuit breathing apparatus with ease.
Tenders are invited for Providing Closed-Circuit Breathing System and 10 Divers Semi
Procurement Providing Closed-Circuit Breathing System and 10 Semi Loads Divers According Notebook
All equipment supplied under the contract should comply with the following technical specification: EN145:1998, EN13794:2002 and EN1146:2003The base document from which the majority of the requirements are taken is BS EN145:1998 (self-contained closed circuit breathing apparatus compressed oxygen or compressed oxygen-nitrogen type) to cover closed circuit performance with additional requirements taken from BS EN13794: 2002 (Self-contained closed-circuit breathing apparatus for escape) to cover aspects of chemical oxygen performance and prEN1146: 2003 (Self-contained open-circuit compressed air breathing apparatus incorporating a hood for escape) to cover aspects of hood performance.
Supply of 16 pieces of diving breathing apparatus - rebreathers with electronically controlled fully closed-circuit breathing apparatus.