Measuring device for analyzing the composition of a fuel gas, having a filter chamber arranged upstream of a detector

A measuring device for analyzing a composition of a fuel gas including at least a first gas and a second gas different from the first gas, the first gas and the second gas absorbing an infrared light in at least one common first wavelength range in the electromagnetic spectrum, the measuring device including: an intermittent first infrared emitter; a first sample chamber for receiving the fuel gas; a first detector including at least the first gas and operating according to a photoacoustic effect; and a first filter chamber containing the second gas. The first sample chamber, the first detector, and the first filter chamber are arranged relative to each other such that an infrared light emitted from the first infrared emitter passes through the first sample chamber and the first filter chamber and impinges on the first detector.