3M™ Clean-Trace™ Surface Adenosine Triphosphate UXL100 is a single-use test device that contains a pre-moistened swab for the collection of a sample from a surface. Upon activation of the test, the chemical reacts with the sample collected on the swab to produce light. The amount of the light produced is proportional to the degree of potential contamination. Measurement of the light requires the use of a 3M™ Clean-Trace™ Luminometer NG and the results are displayed in Relative Light Units (RLU). With its unique liquid stable enzyme, 3M™ Clean-Trace™ Surface ATP offers superior levels of repeatability. This aspect of its performance and its incredible simplicity means customers throughout the world have put 3M™ Clean-Trace™ Hygiene Management Solutions at the heart of their hygiene monitoring programs. Results are measured in the 3M™ Clean-Trace™ NG Luminometer and provided in Relative Light units (RLU).