TROLMASTER - CO? SENSOR FOR CARBON-X (MBS-K30)The ability to read up to 30,000 ppm CO? is critical to the proper operation and safety of an emergency CO? system like the Carbon X. The MBS K30 is Trolmaster? s newest CO? sensor, which incorporates a NDIR 0 30,000 ppm sensor in a self aspirated enclosure. The MBS K30 also features a built in LCD display that will constantly display the current CO? level (ppm). Each of the zones rooms monitored by the Carbon X can have 1 or 2 MBS K30 CO? sensors