An LED bulb includes a connecting member having an Edison male screw base and an LED module engaging with the connecting member. 5 pounds per square inch above the operating pressure to disperse the tracer gas throughout the system liquid; and sensing for the presence of the tracer gas using one or more sensors located outside the contained system. A CPU 10 of an analysis device 100 calculates variation cycles of resistance in accordance with the resistance data and outputs respiration values based on the calculation results.