Patent ID: 8863581

Claim:
A digital pressure gauge configured for coupling with an external fluid pipe, comprising: a housing including an inlet for coupling with the external fluid pipe to permit flow of fluid from the external fluid pipe into said housing; a pressure sensing unit disposed in said housing at a position corresponding to said inlet and operable to sense fluid pressure of the fluid flowing through said inlet and to generate a pressure signal corresponding to the fluid pressure sensed thereby; a first electronic circuit unit disposed in said housing and electrically connected to said pressure sensing unit for receiving the pressure signal therefrom; a second electronic circuit unit disposed in said housing, spaced apart from said first electronic circuit unit, and electrically connected to said first electronic circuit unit for receiving the pressure signal therefrom, said second electronic circuit unit being operable to convert the pressure signal to a display signal, said second electronic circuit unit including a power switch for activating and deactivating said second electronic circuit unit and at least one test contact for testing functionality of at least one of said first and second electronic circuit units; a display module disposed on said housing and visible outwardly of said housing, said display module being electrically connected to said second electronic circuit unit for receiving the display signal therefrom; a battery seat disposed in said housing for receiving a battery, and electrically connected to at least one of said first and second electronic circuit units; said housing being formed with an opening registered with said battery seat to permit placement of the battery in and removal of the battery from said battery seat through said opening; and a cover removably attached to said housing, and including a display area for viewing of said display module, and a press component for actuating said power switch; wherein, when said cover is removed from said housing, the battery is removable from and positionable onto said battery seat through said opening, and said test contact is accessible for tests.