Directional differential pressure detector having an inclined conduit and a pitch indicator

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 permitting fluidic pressure connection between the second space and the first space, the device comprising:

• an inclined conduit configured to form a fluidic pressure connection between the first space and the second space, wherein the inclined conduit includes a first region and a second region, and wherein the first region is vertically lower than the second region, wherein the inclined conduit is rotatably attached to the barrier to permit adjustment of an inclination of the inclined conduit relative to a horizontal plane, and wherein the inclined conduit is rotatable about an axis of rotation which is transverse to the barrier, and the inclined conduit is rotatable along a plane;
• at least one movable element disposed within the inclined conduit and movable from the first region of the inclined conduit to the second region of the inclined conduit in response to a differential pressure between the first space and the second space;
• a base configured to be coupled to the barrier;
• and
• a pitch level disposed on the base, wherein the pitch level is configured to indicate whether the device is oriented correctly with respect to pitch.