The ALTAIR 5X Detector is equipped with an internal integral pump It allows for an industry-first LEL, O2, CO, H2S, and SO2 60-second span calibration and 10-second bump test time The ALTAIR 5X Detector is powered by the fast MSA XCell Sensor family including the introduction of 3 new sensors 4-year expected sensor life on LEL, O2, CO, H2S, SO2, IR, and standard 3-year instrument warranty. 3-year expected sensor life on NH3, Cl2, and standard 2-year warranty The ALTAIR 5X Detector provides an industry exclusive end-of-sensor-life-warning MotionAlert feature - man-down alarm InstantAlert feature - manual alarm The ALTAIR 5X Detector is durable, providing industry - leading impact resistance