The advantages of the PT500 PT Core+ Fuel-Cell Technology are numerous! The PT500 offers a simple menu-driven operation allowing you to take a test, set specific alarm points or check how many tests have been performed. The PT500 has a brilliant 4-digit test result display that can pick up trace amounts of alcohol+examples such as 0.003% or 0.006% BAC vwhich is the perfect solution for zero-tolerance testing environments screening for the presence of small amounts of alcohol.