The Oxigraf Rack-Mount Indicator Light is a 3U rack panel with labeled indicator lights and an LCD analog display of oxygen concetration. It has four colors

• Green (Indicates System OK, no malfunctions)
• Amber (Indicates a warning condition requiring techician attention)
• Blue (Limit B exceeded, calibration recommended)
• Red (Limit A exceeded, potentially hazardous low-level of oxygen)

The panel comes with a heavy duty PC label that describes the meaning of each light. The lights are long-life LED's for reliability.