A Tale Of Two Thermals: Capillary And Immersible

By Mark McMahon, Scientific Product Manager, Scott Rouse, Industrial Product Manager, Sierra Instruments

For gas mass flow measurement and control, Sierra offers the broadest selection of thermal mass flow measurement products on the market. This is because our thermal mass flow products incorporate two types of advanced thermal technologies, each complementary to the other and each with unique advantages. These two thermal sensing technologies directly measure gas mass flow based on principals of heat transfer and are commonly called Capillary Thermal Sensor Technology and Immersible Thermal Sensor Technology. Taken together they cover the entire spectrum of gas mass flow measurement and control applications found in industry. Sierra is the only company in the industry to provide both thermal technologies to our customers.

The following tells “A Tale of Two Thermals” and is meant to educate our customers about Sierra’s thermal mass flow technology. Our thermal products are divided into two identifiable families—The Scientific Products Family which uses proprietary capillary thermal sensor technology and the Industrial Products Family which uses our advanced immersible thermal (sometimes called thermal dispersion) sensor technology.