The Macurco CD-12MC (Manual Calibration) is a line voltage monitors providing automatic fan control to help maintain acceptable levels of Carbon Dioxide in the beverage and food industries, refrigeration, welding, greenhouses, pharmaceutical, and other chemical processing or other commercial applications – Can be used as a stand-alone detector and controller and as an analog transducer for use with the DVP-120 and other systems – 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.