"The Macurco 6 & 12 Series detection family requires routine testing and calibration.Each detector has a corresponding testing/calibration kit to test and calibrate thedetectors in the field. Sensors may drift over time so it is recommend to have amaintenance plan to ensure detectors responding to gas appropriately. A gas calibrationis the process of exposing a sensor to a target gas at a specific concentration and thenadjusting the gas detector to read that gas concentration properly."