Eldridge Products, Inc. has achieved innovation and excellence in thermal dispersion gas mass flow measurement since 1988. With an economical set of features and a number of common configuration and installation choices, our newest ValuMass™ flow meters continue our tradition of solving flow measurement challenges for customers around the world. ","ValuMass™ Series 500 Flow meters","Eldridge Products, Inc. (EPI) is a proven leader in gas flow measurement. Our Master-Touch™ thermal dispersion gas mass flow meters and patented Flow Averaging Tubes set the standard for innovation, performance and reliability. Now our Series 500 ValuMass™ flow meters offer a lower cost option for many flow applications with the high value associated with all of EPI’s flow measurement instrumentation.