The GD-6 Low Voltage monitor provides automatic feedback and fan or valve control that can help reduce combustible gas concentrations in parking garages, battery rooms, maintenance facilities and other locations that require combustible gas detection – ETL ListedThe Macurco 6 & 12 Series fixed gas detectors provide life-saving solutions aimed to protect people and property. These fixed gas detectors are designed for low level detection, mitigation, and notification. Let these detectors do the work for you by shutting off valves, turning on fans, engaging horns and strobes, and provide notification to fire panels and building automation systems when gases reach key limits.