Directional differential pressure detector

A device for indicating a presence of a directional differential pressure between a first space and a second space separated from the first space by a barrier, the device comprising:

• a baseplate configured to be secured to the barrier such that the baseplate is not rotatable relative to the barrier while secured to the barrier;
• an inclined conduit connected to the baseplate and configured to be fluidically connected to the first space and the second space, wherein the inclined conduit is inclined at an angle relative to a horizontal plane;
• and
• at least one movable element disposed within the inclined conduit and movable from a first, vertically lower region of the inclined conduit to a second, vertically higher region of the inclined conduit in response to the directional differential pressure between the first space and the second space being greater than a threshold differential pressure;
• at least one end stop included with the inclined conduit, wherein the at least one end stop has an opening;
• and
• at least one ramp disposed within the inclined conduit, wherein the at least one ramp is disposed adjacent to the opening of the at least one end stop, and wherein the ramp is configured to permit the movable element to be pushed against the opening of the at least one end stop when the movable element moves along the ramp.

A device for indicating a presence of a directional differential pressure between a first space and a second space separated from the first space by a barrier, the device comprising:

• a baseplate configured to be secured to the barrier such that the baseplate is not rotatable relative to the barrier while secured to the barrier;
• an inclined conduit connected to the baseplate and configured to be fluidically connected to the first space and the second space, wherein the inclined conduit is inclined at an angle relative to a horizontal plane;
• a plurality of roll levels configured to indicate a roll orientation of at least one of the baseplate and the inclined conduit;
• and
• at least one movable element disposed within the inclined conduit and movable from a first, vertically lower region of the inclined conduit to a second, vertically higher region of the inclined conduit in response to the directional differential pressure between the first space and the second space being greater than a threshold differential pressure.