The GloMax® 20/20 Luminometer is an ultrasensitive, compact laboratory instrument for measuring luminescent materials. Specifically, the GloMax® 20/20 Luminometer accommodates measurement of firefly and Renilla luciferase for genetic reporter studies and ATP-based biomass analysis, and so is an ideal platform for reading Promega bioluminescent assays. Additionally, the GloMax® 20/20 Luminometer will measure chemiluminescence from both horseradish peroxidase and alkaline phosphatase. The touch screen on the luminometer allows easy setup and operation. The optional automatic dual injectors permit reproducible and convenient measurements of flash-type luminescent reactions. The GloMax® 20/20 Luminometer also features optional modules for measuring certain fluorescent materials including fluorescein, Hoescht dye, 4-MU, PicoGreen® dye and RiboGreen® dye.