Within the European Community, intrinsically safe pressure sensors may only be utilized in hazardous areas if they’re installed together with an Ex barrier. digital pressure gauge of pressure sensor and Ex barrier must meet the ?Proof intrinsic safety? relative to the 94/9/EC ATEX directive. Not all combinations of sensor and barrier from different manufacturers fulfil this condition.
On the one hand, it could be that the safety or Ex characteristic values usually do not match, alternatively, the functional characteristics must also match the application. So, even though the safety-related data match, the couple of Ex barrier and pressure sensor may not match since, for example, both components work ?passively?.
(Additional information on the subject ?active?/?passive? can be found in the blog article ?Electrical circuitry for pressure sensors: when is a sensor active, so when passive??)
Therefore, factors to consider that you merely use barriers and sensors together whose safety-related data and function-related data match each other. pressure gauge recommend, in our intrinsically safe pressure sensors? data sheets, a potentially compatible intrinsically safe Ex barrier.
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