text: ATP is a molecule found 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 ATP present in the sample.  
  ATP tests can be used to: 
  * Control biological treatment reactors
  * Guide biocide dosing programs
  * Determine drinking water cleanliness
  * Manage fermentation processes
  * Assess soil activity
  * Determine corrosion / deposit process type
  * Measure equipment or product sanitation