The ATP Tester / Luminometer is a compact and powerful measuring device for quickly checking surface hygiene in various areas of application. Using biochemical luminescence technology, the ATP Tester / Luminometer converts invisible ATP concentrations into visible light signals and outputs the results as relative light units (RLU). The measured values range from 0 to 9999 RLU and enable a precise and quantitative assessment of microbial contamination. The resolution is 1 RLU and the accuracy is ±2% or ±2 RLU. 9999 RLU and enable a precise and quantitative assessment of microbial contamination. The resolution is 1 RLU, and the accuracy is ±2% or ±2 RLU. The ATP Tester / Luminometer has an internal memory for 3000 measurements and supports the storage of up to 100 limit numbers with individually adjustable limit values. The measurement results are displayed on an easy-to-read LCD screen. The internal calibration function ensures reliable measurement results, while the energy-saving mode optimizes battery life. The ATP Tester / Luminometer is operated via a clear keypad with functions such as date and time setting, limit value management and data memory management. The ATP Tester / Luminometer is ideal for use in the food industry, healthcare, public institutions and for monitoring cleaning and disinfection processes. Typical areas of application include the inspection of work surfaces, medical equipment, production facilities and other hygiene-relevant surfaces.