Medical gas analysers O2 These portables units are dedicated to control the gas networks in the hospitals. They respect the reglementation and make it possible to carry out several tests simultaneously : - Control of the mecanic catches on the walls. - Control of the nature of gas by analysis of O2. - Control of pressure, vaccum to 10 Bar. The maintenance from the HOPITEST111 or 121 remains reduced thanks to an electrochemical O2 sensor with a long lifetime about 4 years to the air.