Intended for Safety Instrumented Systems (SIS), STZ Functional Safety Smart HART Temperature Transmitter conforms with IEC 61508:2010 for safety-related applications and provides dual sensor input that reduces process interruptions. Backup and fail-over protection allows either sensors or inputs to be designated as primary measurement; secondary input acts as backup. Also, dual sensor input allows for Average and Differential measurements along with High-Select and Low-Select options.