Refineries and hazardous areas gas analyzers for industrial air monitoring - Air and Climate
Chromatotec can propose for hazardous areas (for instance refineries) specific boxes for our analysers : category 1 IIc T4 for example.
In the United States and in Asia the classification is as follows: Class I, Div II, groups C and D
As far as security is concerned only one carrier gas is used air or Nitrogene. It is used as carrier gas for the dilution of the permeation tube for the pressurization of the box.
Example : airTOXIC PID