Selecting a safety-critical level instrument using undetected (DU) failure rates

Dangerous undetected (DU) failure rates are often considered more relevant than safe failure fraction as a basis for selecting a safety-critical instrument. The latest vibrating fork level switches from Emerson have been designed with enhanced diagnostics capability, to reduce the number of DU failures and increase plant safety.

Read Tim Hill’s article on this subject here on pages 27 to 31. http://bit.ly/2olGhhd