One principle of flowmetering that is rapidly gaining acceptance is the thermal method, in which the transfer of heat in a liquid or gas is measured. In this procedure a heating element supplies a certain amount of heat and temperature sensors measure the heat distribution. This principle is well suited for miniaturization with MEMS sensors and for ASSP system integration. Low flow rates can also be precisely measured and controlled, as in medical applications, for example.
Read the full article on page 42 of our March digital edition