Positive displacement volumetric compressible fluid meter

In the combination of a source of gas at a pressure not substantially less than about 30 psia in fluid communication with a power generating unit and a means for measuring accurately the volumetric flow rate of said gas when said flow rate is as low as 0.2 ft.sup.3 /hr,

• a high pressure container including a plate which forms the top surface of said container, said plate including three openings leading into said container,
• said measuring means being mounted within said container and in fluid tight relationship with the underside of said plate
• the first said opening being in fluid communication with the source of gas,
• the second said opening being of a size to restrict the flow of gas from said container to not substantially greater than 150 ft.sup.3 /hr when the pressure of said gas at said first opening is 30 psia,
• the third opening being asscoiated with said measuring means and configured to allow the transmission of data from said measuring means to a signal means external of said container without substantial leakage of said gas from said container,
• said measuring means including an inlet, a flow path leading from said inlet to a positive displacement measuring means and subsequently to an outlet, said inlet being located within said container to minimize the possible entrance of foreign material into said measuring means inlet.