For the demonstration of an Advanced Mirphab Module (AMM), IAF and CEA-LETI collaborated to demonstrate a gas sensing system on a bench. An EC-QCL from IAF was assembled with the miniPA of LETI. CO2, H2O, N2O (AIR) measurements (around 4,3µm) were carried out successfully. This paves the way to compact EC-QCL based Photo-Acoustic gas sensor.