Muon detector using Geiger counter tubes

From the MAKE Flickr pool

Robert Hart posted a test run of his Cosmic Ray Muon Detector which uses three parallel Geiger–Müller Tubes. Simultaneous readings on all three tube sensors indicates the momentary presence of cosmic radiation. Robert built this device to assist in testing a similar unit which uses common fluorescent tubes for detection.

Related:

Cosmic ray detection with fluorescent tubes