Engineers selecting pressure transducers in hazardous industries must make one more significant consideration beyond performance, reliability and stability, they must specify units with intrinsically safe (IS) circuits. The National Electrical Code (NEC) defines an IS circuit as, “A circuit in which any spark or thermal effect is incapable of causing ignition of a mixture of flammable or combustible material in air under prescribed conditions.” In addition, intrinsically safe products are incapable of storing large amounts of energy that might spark an explosion when discharged. These circuits must be used wherever there are combustible gases, vapors, liquids, dust or fibers.
This paper discusses what industries and applications require IS systems and the technical
considerations for specifying an IS pressure transducer.

SETRA SYSTEMS (2015) How to Select an Intrinsically Safe Pressure Transducer

SETRA SYSTEMS (2015) How to Select an Intrinsically Safe Pressure Transducer
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