The present work treats the problem of routing

data within a wireless sensors network (WSN) for industrial

process control. Our application interests British Gas to monitor

the level of propane in a tank. The considered methodology is

based on the algorithm CSMA / CA Slotted to access the

medium, the processing algorithm measures the volume of

propane to exploit failing sensors and intelligent routing

algorithm transmission value through the base station while

ensuring minimizing energy consumption and maximizing the life

time of nodes. The combination of these mechanisms gives birth

to a new approach which has been applied to a WSN installed in

the industry in order to analyze the performance of the

techniques developed for the quality of service Qos, the energy

conservation and extension of life.