Emergency Medical Technician III Progress Indicator: Question 2 of 20 2.  The required minimum number and type of operational gas detectors that must be available to a MNM mine rescue team is? Choices: 2 equipped with CO, CO2, O2 and LEL 4 equipped with CO, NO2, O2 and LEL 2 electronic detectors and 2 Dragers equipped with CO, NO, O2 and Methane 4 detectors capable of testing for each gas that may be encountered