Catalytic combustion type gas sensor was fabricated by using γ-Al₂O₃, Pd catalyst and some binders for metane and propane detection. Using the gas sensor, digital gas meter was manufactured and tested for sensing performance. The fabricated sensor had power consumption of 700mW with applied voltage of do 2V and the output voltage of the sensor was about 700mV for propane of 1,000ppm and 500mV for methane of 1,000ppm. In 10 cycle injection of the gases of 2,400ppm. The digital meter showed good sensitivity, linearity. and reproductivity with precision of ±25ppm(±1%)