ATP is a molecule found only in and around living cells, and as such it gives a direct measure of biological concentration and health. ATP is quantified by measuring the light produced through its reaction with the naturally-occurring firefly enzyme Luciferase using a Luminometer. The amount of light produced is directly proportional to the amount of biological energy present in the sample.

Within a water sample containing microorganisms, there are two types of ATP:

Intracellular ATP – ATP contained within living biological cells.

Extracellular ATP – ATP located outside of biological cells that has been released from dead or stressed organisms.

Accurate measurement of these two types of ATP is critical to utilizing ATP-based measurements. Being able to accurately measure these different types of ATP offers the ability to assess biological health and activity, and subsequently control water and wastewater processes.

thank you very much 

ATP is measure using a cheap luminometer and also cheap swabs

The test is done in seconds to measure bioluminescence

 http://www.hygiena.com/systemsure-healthcare.html