Eldridge Products, Inc. thermal mass flowmeters. EPI manufactures Master-Touch thermal mass flow meters to meter the flow of gas in industrial process lines. Our thermal mass flow meters are an economical alternative to anemometer, annubar, coriolis, differential pressure, positive displacement, pitot tube, turbine meter, ultrasonic, venturi, and vortex shedder instrumentation. mass flow meter, mass flow meters, mass flowmeter, mass flowmeters, mass measurement, mass meter, thermal mass flowmeter, thermal mass flow meter, thermal flowmeter, mass flow, gas flowmeter, gas mass flow, gas mass flow meters, gas mass flowmeters, gas flowmeters, insertion mass flow meters, flow meter, flowmeter, flowmeters, flow metering, insertion mass flow elements, insertion mass flow transmitters, in-line mass flow meters, in-line mass flow elements, in-line mass flow transmitters, high purity mass flow meters, high purity mass flowmeters, high purity flowmeters, air flow meter, air flowmeter, air flow, a