Within the European Community, intrinsically safe pressure sensors may only be used in hazardous areas if they are installed together with an Ex barrier. The mix of pressure sensor and Ex barrier must meet the ?Proof intrinsic safety? relative to the 94/9/EC ATEX directive. Not absolutely all combinations of sensor and barrier from different manufacturers fulfil this problem.
On the main one hand, it might be that the safety or Ex characteristic values do not match, however, the functional characteristics must match your application. So, even if Tested -related data match, the pair of Ex barrier and pressure sensor may not match since, for example, both components work ?passively?.
(Additional information about them ?active?/?passive? are available in the blog article ?Electrical circuitry for pressure sensors: when is a sensor active, so when passive??)
Therefore, you should make sure that you merely use barriers and sensors together whose safety-related data and function-related data match one another. We therefore directly recommend, in our intrinsically safe pressure sensors? data sheets, a potentially compatible intrinsically safe Ex barrier.
If you have any more questions, our sales department will gladly will give you detailed application consultation.g