Plastic scintillator detectors consist of a solid solution of organic scintillating molecules in a polymerized solvent. They are easily cast into a variety of shapes and sizes making them an extremely useful form of scintillator. Cast sheets are the most common form with sheets being cut into smaller detectors where necessary. Other forms such as rods, blocks and custom shapes are also possible. Cast faces are usually untouched and edges can be diamond milled for an enhanced finish.

Plastic scintillators can be purchased by themselves or as part of completed detector assemblies incorporating light guides, photomultiplier tubes, special radiation entrance windows, light-tight wrapping, and electronics