RLU stands for Relative Light Units and is the unit of measure used in the NEMIS luminometer. RLU values are proportional to the amount of AquaSpark™ light emission triggered by the specific enzyme. For each NEMIS test, a certain threshold for presumptive positive and presumptive negative results has been defined. In the case of the N-Light™ Salmonella Risk test, when the signal is above 20’000 RLU, the enzyme alpha-galactosidase has been detected, indicating that there is a risk of the presence of Salmonella spp.
