Functional Safety

"The most important part during the design of safety loops is the following: The choice of the right measurement technique and the respective installation."

Lothar Gellrich,
Vice President Operational Marketing,
Functional Safety Expert

Making safety loops even more reliable with measurement technology

Functional Safety is a fundamental part of human and plant safety in the process industry. KROHNE has implemented all relevant aspects into a comprehensive portfolio of measurement equipment, meeting the latest international safety standards, and incorporating advanced safety features.

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Temperature measuring points in standard applications safety loops

Automated partial prooftesting

Partial proof testing in general offers great opportunities to increase overall plant safety and the reduction of proof test efforts. Besides the partial proof testing of automated industrial valve assemblies, it is now also possible to partially proof test sensing elements, such as flowmeters, pressure meters, etc.

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Optimisation of safety loops

Optimization of safety loops can be useful in many respects. On the one hand, the effort and frequency of the proof tests can be optimized, but at the same time the failure probability of the safety loop can also be reduced

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Avoidance of systematic errors

In functional safety, a distinction is made between random and systematic errors. The random faults are usually due to the failure of hardware failures. The systematic faults, on the other hand, are mostly due to errors in planning, commissioning or operation.

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Selected instrumentation solutions

In recent years the safety standards for instrumentation could be improved in many areas. Many novelties could be realized throughout several measurement techniques, some are specific for individual ones.

Below a few examples:

Products for use in Safety Instrumented Systems

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OPTIFLUX 4400

Electromagnetic flowmeter for safety instrumented systems (SIS) and high-accuracy requirements

OPTIMASS 6400

Coriolis mass flowmeter for advanced process applications

H250 M40

Variable area flowmeter for liquids and gases

DK37 M8

Variable area flowmeter for advanced low liquid and gas flows

DK32/34

Variable area flowmeter for low liquid and gas flows

DK46/47/48/800

Variable area flowmeter for low flow gas or liquid applications and sample flow monitoring

VA40

Variable area flowmeter for basic applications

OPTISWIRL 4200

Vortex flowmeter for utility applications and energy management systems

Compact orifice plate flowmeter

Integral DP flowmeter for liquids, gases and steam

Integral orifice meter run assembly

DP flowmeter for process applications with small line sizes (down to DN15 / ½")

Averaging pitot tube flowmeter

DP flowmeter for applications with liquids, gases and steam to high-temperature applications with dust-laden gases

Wedge flowmeter

DP flowmeter for harsh process applications with abrasive and viscous media


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