The PerkinElmer Tri-Carb 4810 TR Liquid Scintillation Counter is a computer based, multiuser unit that provides CPM/direct DPM quantitative detection of beta radiation, other types of radiation, and various types of luminescence. The instrument is capable of handling up to 720 sample vials, using 15 pre-defined protocols for detecting 3H, 14C, 32P, and 125I in single label counting.