Pre-Owned Titan Controls® Atlas® 1 - CO2 Monitor/Controller with Remote SensorAtlas 1 CO2 Monitor Controller comes with a 25 ft remote sensor. It features adjustable set point and elevation levels, a built in self calibration function and an integrated photocell that enables operation in daytime hours only, when the plants need CO2. Simple to use and easy to operate. 15 Amps 120 V 60 Hz. Replacement sensor can be purchased separately. The sensor comes factory calibrated for precise CO2 readings and utilizes low voltage