www.safetyandhealthmagazine.com/articles/gas-detector-15

Gas detector

January 1, 2012
The 4501-03, 2-Wire Oxygen Deficiency Gas Detector is loop-powered, eliminating the need for separate power runs and associated power distribution and circuit protection for each device. This detector features a user-friendly operator interface with integral scrolling menu-driven LCD for easy access to gas status, calibration instructions, adjustment of ranges and outputs, and diagnostic information.

Sierra Monitor Corp.