TrolMaster MBS-K30 CO2 Sensor for Carbon-X with Cable SetTrolMaster MBS K30 CO2 Sensor for Carbon X High Precision Monitoring up to 30,000 ppm Designed with serious cultivators in mind, the TrolMaster MBS K30 CO2 Sensor is a must have for any advanced emergency CO2 management system. Built specifically for use with the TrolMaster Carbon X system, the MBS K30 delivers highly accurate readings up to 30,000 ppma crucial capability for ensuring grow room safety and regulatory compliance in CO2 enriched