The analog manometer, commonly referred to as a Magnehelic ®, is a test instrument that has been around the HVAC industry for decades. Among many technicians in the field, it is still the test ...

Benjamin Franklin was one of the most creative minds in American history. To aid him in his creative problem solving, he liked to use a piece of paper with two columns drawn on it. Franklin would ...

To present abbreviations and fundamental conversion factors commonly used in manometry; recommended definitions of pressure in terms of a column of mercury and water; and for a large number of liquids ...