Ex barrier and intrinsically safe pressure sensors ? an inseparable pair

Within the European Community, intrinsically safe pressure sensors may only be used in hazardous areas if they’re installed together with an Ex barrier. The mix of pressure sensor and Ex barrier must meet the ?Proof of intrinsic safety? in accordance with the 94/9/EC ATEX directive. Not all combinations of sensor and barrier from different manufacturers fulfil this condition.
On the main one hand, it can be that the safety or Ex characteristic values usually do not match, alternatively, the functional characteristics must also match the application. So, even if the safety-related data match, the pair of Ex barrier and pressure sensor may not match since, for example, both components work ?passively?.
(Additional information on the subject ?active?/?passive? are available in the blog article ?Electrical circuitry for pressure sensors: when is a sensor active, and when passive??)
Therefore, factors to consider that you merely use barriers and sensors together whose safety-related data and function-related data match one another. We therefore directly recommend, inside our intrinsically safe pressure sensors? Simplistic , a potentially compatible intrinsically safe Ex barrier.
If Invasion have any more questions, our sales department will gladly offer you a detailed application consultation.

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