Chlora standard complying petrochemical chlorine analyzers have two main types. The Chlora can be used for liquid petrochemical samples in the range of 0.5-3000 ppm. The Chlora 2XP model has twice lower detection limit, therefore having a 0.2 ppm LOQ (limit of quantification) what makes suitable for applications where the quantification of chlorine as a catalytic poision is a must. Thanks to the patented monochromatic optical design the unit requires neither helium purge nor a vacuum pump and having user-friendly software which can be reached through built-in screen. Measurements are featured by easy sample preparation, low maintenance demand and high reliability.