This is a module of the latest generation of PICASSO detectors as installed at SNOLAB. It is a 4.5l module with 80g of active mass of C4F10. Droplets are suspended in an elastic polymer.
Signals are recorded by 9 piezo electric sensors. Events are localised by GPS-like triangulation.
Presently PICASSO is installing a new experiment with 32 detector modules as shown to the left and with an active mass of 2.6 kg.