Fixed gas monitors operate around the clock to protect equipment and personnel from hazardous toxic or explosive gases. These monitors support many types of gas sensors and should be carefully selected to alarm at levels below those that are dangerous to life or health, or that would represent an explosion hazard. In typical systems, multiple gas monitors may be connected to a System Controller that provides a clean and reliable source of DC power and includes remote high visibility strobes or loud sounder horns that make it possible for employees and visitors to move to safe location in the event of a gas leak.