To calibrate detectors fitted with electrochemical or catalytic bead sensor cells, you will need some adapters, a flow regulator, and some rubber tubing. This calibration kit contains the required tools and equipment needed to properly calibrate ammonia gas detectors. Parts included are detailed below.Carrying Case with enough space for two 34L calibration gas cylindersRubber adapters for electrochemical sensors.3 LPM flow regulator, male C-10 connection fitting3 ft of high-grade rubber tubing