NASA's robotic 'sniffer' confirms space station leak, repair

In recent operations on the International Space Station, robotic operators were twice able to test and confirm the ability of the Robotic External Leak Locator (RELL) to "smell" in space. Using the RELL instruments, operators successfully located a small leak from the station's ammonia coolant loop, and confirmed that it was not a safety concern. Later they were able to return and more precisely characterize the leak. This valuable data helped station operators vent and isolate the leaking line from the coolant loop and successfully stop the leak. More

(Source: Phys.org - Sep 16)