The Shiva CO2000 is a professional CO2 sensor and controller for use in indoor grow rooms and green houses. It allows you to set a required CO2 level and based on the readings taken from its inbuilt CO2 sensor, it will activate your chosen CO2 release system to dose and maintain the correct amount of CO2 inside the grow room. The Shiva CO2000 uses a highly accurate single beam absorption infrared sensor that will precisely measure the amount of CO2 present inside the grow room and maintain the CO2 level to within 100PPM of the set point.