Differential pressure indicators

Details Differential pressure indicators Differential pressure indicators

G - Physics

01

L

G01L 13/02 (2006.01) B01D 35/143 (2006.01) H01H 35/26 (2006.01) H01H 35/38 (2006.01) H01H 36/00 (2006.01)

Patent

CA 2167885

A double differential pressure indicator has a housing containing two pistons arranged in contiguous bores and biased by a single spring extending between opposed ends of the pistons. The differential pressure is applied across both pistons and as the pressure differential increases to a first predetermined difference one piston moves to operate a first indicator which may, for example, be a reed switch. As the differential pressure further increases, the second piston moves to operate a second indicating device which may be a button. In an alternative arrangement, both indicating devices operate at the same differential pressure.

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