How does the Electron Capture Detector work?

Transcript for an animation showing the workings of the electron capture detector, a sensitive chemical detector designed by James Lovelock. The animation accompanied a display of the ECD from the SMG collection, and associated documents from the archive of Lovelock. This exhibit featured in the 2014 Science Museum exhibition Unlocking Lovelock: Scientist, Inventor, Maverick. This exhibition displayed, for the first time, items from the archive of James Lovelock, which had been acquired by the Science Museum in 2012. The exhibition was part of the Climate Changing Programme, a 5 year programme of events, temporary exhibitions and installations conceived to run alongside the museum's Atmosphere: Exploring Climate Science gallery, which opened in December 2010.