www.pcimag.com/articles/106536-respiratory-airline-monitor-from-gfg-instrumentation-inc

Respiratory Airline Monitor from GFG Instrumentation Inc.
September 1, 2019
The RAM 4021 supplied air monitor is designed to monitor carbon monoxide in compressor-supplied breathing air applications. Meeting all OSHA standards for both Grades D and E respiratory air, it incorporates a chemical cell sensor, liquid crystal display and programmable alarm system. E-mail info@goodforgas.com.