/community-hubs/measurement-instrumentation/b/level-weblog/posts/selecting-a-safety-critical-level-instrument-using-undetected-du-failure-ratesDangerous 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 diagnosticsen-USTelligent Community 13