Rugged instrumentation for reliable measurement and control

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Monitoring Critical Compressors to Prevent Over Speed Conditions

Problem: Critical compressors often need an independent safety protection system to prevent over-speed conditions from developing which can damage equipment and endanger personnel and facilities.

Monitoring Critical Compressors to Prevent Over Speed Problem Solvers Moore Industries
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Solution: The SFY can be used as part of the Safety Instrumented Function (SIF) to monitor compressor speed and provide data to a safety logic solver. To accomplish this, a magnetic pickup is attached to the compressor shaft. The pickup provides a frequency output. The SFY takes the pickup signal, converts it to a 4-20mA output proportional to the shaft speed, and transmits it to the SIS Logic Solver. Should there be an unwanted change in speed, it can be detected at the Logic Solver. This helps mitigate compressor damage or personnel injuries.

Model Number Example
SFY / PRG / 4-20MA / 12-42DC / [BH2NGP]