White Papers
Selecting “Sensors” for Safety Instrumented Systems per IEC 61511 (ISA 84.00.01 – 2004(PDF 178 KB)
This paper will discuss sensor classifications of “sensors” for SIS applications
that meet IEC 61511 (ISA 84.00.01-2004) requirements while minimizing
lifecycle costs. The history of SIS standards is discussed followed
by a discussion on the iterative process used for selecting sensors
for SIS applications. The sensor selection includes an in-depth discussion
of the two options, certified and prior-use. The paper then concludes
by discussing other considerations when selecting sensors for SIS such
as product capabilities and limitations, proof-test, safety accuracy
and safety response time.
