Sensor, apparatus and method for determining a concentration of solute in a solution (PCT /ES2016/070764) The document describes a sensor, apparatus and method for the direct analysis of fluids in order to determine a concentration of solutes in solutions, such

System and method for analysing the gas present in the interannular space in tubular solar receivers (PCT/ES2016/070250) The invention relates to a non-invasive method and system for evaluation of the state of vacuum and detection of the type of gas