Patent ID: 9568384
Date: 2017-02-14
CPC Classifications: G01D,G01L

Claim:
1. Apparatus for measuring pressure relative to an atmospheric reference pressure, comprising: a pressure sensor; and a sealed variable volume enclosure enclosing at least one of pressure sensing electronics and electrical terminations for pressure sensing electronics connected to the pressure sensor, the sealed variable volume enclosure having a volume defined by walls and a movable element included in the walls, the movable element permitting variation of the volume of the sealed variable volume enclosure in response to atmospheric pressure to at least partially equalize an internal pressure of the sealed variable volume enclosure to the atmospheric pressure external to the sealed variable volume enclosure, whereby the pressure sensor uses the internal pressure within the sealed variable volume enclosure as a reference to measure pressures relative to the atmospheric pressure, wherein the sealed variable volume enclosure is connected to the pressure sensor via the electrical terminations and a vent tube, and the vent tube is pneumatically connected to the volume of the sealed variable volume enclosure.