How does ATP testing work?
ATP bioluminescence is the most widely used method for rapid hygiene verification in the food industry. Understand the science behind the technology.
What is ATP?
ATP (adenosine triphosphate) is the primary energy molecule in all living cells. It is present in bacteria, fungi, yeasts, plant and animal cells — in short, in all biological matter.
When ATP is found on a surface, it means biological residues are present. These can be food residues, bacteria, or other organic contamination — even if the surface looks visually clean.
ATP bioluminescence measurement provides a direct, quantitative measure of the biological cleanliness of a surface in just 5 seconds.
The test process step by step
From sampling to result with PocketSwab Plus. The measurement in the novaLUM II-X takes 5 seconds; sampling and activation come before it.
Sample at the location
Withdraw on site 
Sample At the sampling location, gently twist and withdraw the pre-moistened swab immediately before sampling. Swab 100 cm² (10×10 cm) with good surface contact. Do not touch the tip.
Activate the reagents
Activate 
Shake sideways Return the swab and twist the handle fully down to pierce the foil and activate the dry tablets. Gently shake sideways 3×.
Insert into luminometer
Measurement Insert the activated swab into the novaLUM II-X luminometer and press the measure button.
Read the result
Example result In 5 seconds an RLU value appears with a PASS (green) or FAIL (red) indication on the display.
Understanding RLU values
Surface is biologically clean. Cleaning has been effectively carried out. Production can start.
Insufficient cleaning. Immediate re-cleaning required. Re-test before production start.
Important: Set your own threshold values
The exact PASS/FAIL threshold values are set based on your specific production environment, cleaning agents and risk analysis. The novaLINK 6 software allows you to set customised limits per location and product type.
ATP testing vs. traditional methods
| Criterion | ATP Testing | Visual inspection | Microbiological culture |
|---|---|---|---|
| Result time | 5 seconds | Immediate | 24–48 hours |
| Detects bacteria | ✓ Yes | ✗ No | ✓ Yes |
| Detects food residues | ✓ Yes | Limited | ✗ No |
| Quantitative | ✓ RLU values | ✗ Subjective | ✓ CFU/ml |
| Immediate action possible | ✓ Yes | Limited | ✗ No |
| HACCP documentation | ✓ Automatic | Manual | Manual |
| Cost per test | € 1–3 | Minimal | € 10–50 |
Read more in our knowledge base
Ready to optimise your hygiene?
Request a free demo or receive a custom quote for your production environment.