Sensor systems and methods are disclosed herein. In general, a sensor can be provided for detecting the presence of a gas (e.g., hydrogen) in an area proximate to the sensor component. A composite material is generally associated with the sensor, wherein the composite material comprises a metal hydride material for gas storage. A heater can also be provided that heats the metal hydride material to a particular temperature at which hydrogen is released from the metal hydride material in order to calibrate and self-test the sensor for detecting the presence of gas.