These AEM Electronics water/methanol FAILSAFE devices actively monitor the injection system's entire flow curve independent of pressure. They continuously collect flow vs. injection rate data so that any deviation from your established flow curve will trigger an alarm output that can be used to reduce boost or timing, change maps, add fuel, or trigger a two-step. They include a high-tech analog gauge with programmable backlighting to match your factory gauges and use a backlit, programmable needle that will flash when an alarm is triggered to notify the system of a potential error. The devices feature PC-based software and an auto-scaling flow map that helps simplify setup and they have an auto set feature that creates a baseline configuration.