A system for mounting a differential pressure indication 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 is provided. The system may include a base configured to be mounted against the barrier, where the base includes a receptacle configured to removably receive the pressure indication device. The system may include at least one mounting fastener configured to removably secure the differential pressure indication device within the receptacle. The system may include a pitch adjuster configured to secure the base to the barrier, where movement of the pitch adjuster is configured to adjust a spacing between a portion of the base and the barrier to adjust the orientation of the base with respect to pitch.
G01L 19/06 - Means for preventing overload or deleterious influence of the measured medium on the measuring device or vice versa
G01C 9/34 - Measuring inclination, e.g. by clinometers, by levels by using liquids in closed containers partially filled with liquid so as to leave a gas bubble of the tubular type, i.e. for indicating the level in one direction only
G01L 13/00 - Devices or apparatus for measuring differences of two or more fluid pressure values
G01L 19/00 - Details of, or accessories for, apparatus for measuring steady or quasi-steady pressure of a fluent medium insofar as such details or accessories are not special to particular types of pressure gauges
Methods and apparatuses for indicating the presence of a threshold directional differential pressure between separated adjacent spaces. An inclined conduit contains at least one movable element that indicates whether the pressure difference between the two spaces is at least as high as a threshold pressure difference. The apparatus may include an on-board pitch indicator and a roll indicator which are used together to calibrate the apparatus and its installation. The apparatus may provide only one or more discrete number of pressure difference set points and be non-adjustable once installed. The inclined conduit may be non-rotatable relative to the baseplate, and the baseplate may be rotatable to change threshold pressure difference set points. The apparatus may provide a tamper-resistant indication of whether a threshold pressure differential is present.
Methods and apparatuses for indicating the presence of a directional differential pressure between separated adjacent spaces are provided. At least one movable element may be movable within an inclined conduit from a first vertically lower region to a second vertically higher region in response to a differential pressure between a first space and a second space separated by a barrier. The inclination of the conduit may be adjustable along a plane transverse to the barrier.
G01P 13/00 - Indicating or recording presence or absence of movementIndicating or recording of direction of movement
G01L 13/02 - Devices or apparatus for measuring differences of two or more fluid pressure values using elastically-deformable members or pistons as sensing elements
Methods and apparatuses for indicating the presence of a threshold directional differential pressure between separated adjacent spaces. An inclined conduit contains at least one movable element that indicates whether the pressure difference between the two spaces is at least as high as a threshold pressure difference. The apparatus may provide a compact arrangement while allowing the movable element to have a suitable travel path length within the conduit.
G01L 13/04 - Devices or apparatus for measuring differences of two or more fluid pressure values using floats or liquids as sensing elements
G01L 19/00 - Details of, or accessories for, apparatus for measuring steady or quasi-steady pressure of a fluent medium insofar as such details or accessories are not special to particular types of pressure gauges
09 - Scientific and electric apparatus and instruments
Goods & Services
environmental monitoring system comprised of meters and sensors that measure pressure, humidity, temperature and includes alarm and reporting functions; flow meters; pressure indicators
Methods and apparatuses for indicating the presence of a threshold directional differential pressure between separated adjacent spaces. An inclined conduit contains at least one movable element that indicates whether the pressure difference between the two spaces is at least as high as a threshold pressure difference. The apparatus may include an on-board pitch indicator and a roll indicator which are used together to calibrate the apparatus and its installation. The apparatus may provide only one or more discrete number of pressure difference set points and be non-adjustable once installed. The inclined conduit may be non-rotatable relative to the baseplate, and the baseplate may be rotatable to change threshold pressure difference set points. The apparatus may provide a tamper-resistant indication of whether a threshold pressure differential is present.
Methods and apparatuses for indicating the presence of a threshold directional differential pressure between separated adjacent spaces. An inclined conduit contains at least one movable element that indicates whether the pressure difference between the two spaces is at least as high as a threshold pressure difference. The apparatus may provide a compact arrangement while allowing the movable element to have a suitable travel path length within the conduit.
G01L 13/04 - Devices or apparatus for measuring differences of two or more fluid pressure values using floats or liquids as sensing elements
G01L 19/00 - Details of, or accessories for, apparatus for measuring steady or quasi-steady pressure of a fluent medium insofar as such details or accessories are not special to particular types of pressure gauges
A system for mounting a differential pressure indication 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 is provided. The system may include a base configured to be mounted against the barrier, where the base includes a receptacle configured to removably receive the pressure indication device. The system may include at least one mounting fastener configured to removably secure the differential pressure indication device within the receptacle. The system may include a pitch adjuster configured to secure the base to the barrier, where movement of the pitch adjuster is configured to adjust a spacing between a portion of the base and the barrier to adjust the orientation of the base with respect to pitch.
G01L 19/06 - Means for preventing overload or deleterious influence of the measured medium on the measuring device or vice versa
G01C 9/34 - Measuring inclination, e.g. by clinometers, by levels by using liquids in closed containers partially filled with liquid so as to leave a gas bubble of the tubular type, i.e. for indicating the level in one direction only
G01L 13/00 - Devices or apparatus for measuring differences of two or more fluid pressure values
G01L 19/00 - Details of, or accessories for, apparatus for measuring steady or quasi-steady pressure of a fluent medium insofar as such details or accessories are not special to particular types of pressure gauges
A system for mounting a differential pressure indication 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 is provided. The system may include a base configured to be mounted against the barrier, where the base includes a receptacle configured to removably receive the pressure indication device. The system may include at least one mounting fastener configured to removably secure the differential pressure indication device within the receptacle. The system may include a pitch adjuster configured to secure the base to the barrier, where movement of the pitch adjuster is configured to adjust a spacing between a portion of the base and the barrier to adjust the orientation of the base with respect to pitch.
Methods and apparatuses for indicating the presence of a directional differential pressure between separated adjacent spaces are provided. A differential pressure set point indicator may be configured to correlate multiple potential angles of inclination of an elongated conduit to respective threshold differential pressures between two spaces which generate net flow of fluid sufficient to cause a lightweight ball to move from one region of the conduit to an opposing region. The elongated conduit may be adjustable in length so as to accommodate installation of the device into walls of varying thickness. The device may include a sound attenuator that reduces noise upon impact of the ball with either end of the conduit. The device may also include a sealing material that is flexible yet firm enough to provide both a seal with the exterior surface of the conduit and support for the conduit when oriented in a tilted configuration.
Methods and apparatuses for indicating the presence of a threshold directional differential pressure between separated adjacent spaces. An inclined conduit contains at least one movable element that indicates whether the pressure difference between the two spaces is at least as high as a threshold pressure difference. The apparatus may include an on-board pitch indicator and a roll indicator which are used together to calibrate the apparatus and its installation. The apparatus may provide only one or more discrete number of pressure difference set points and be non-adjustable once installed. The inclined conduit may be non-rotatable relative to the baseplate, and the baseplate may be rotatable to change threshold pressure difference set points. The apparatus may provide a tamper-resistant indication of whether a threshold pressure differential is present.
Methods and apparatuses for indicating the presence of a directional differential pressure between separated adjacent spaces are provided. At least one movable element may be movable within an inclined conduit from a first vertically lower region to a second vertically higher region in response to a differential pressure between a first space and a second space separated by a barrier. The inclination of the conduit may be adjustable along a plane transverse to the barrier.
G01L 13/02 - Devices or apparatus for measuring differences of two or more fluid pressure values using elastically-deformable members or pistons as sensing elements
Methods and apparatuses for indicating the presence of a threshold directional differential pressure between separated adjacent spaces. An inclined conduit contains at least one movable element that indicates whether the pressure difference between the two spaces is at least as high as a threshold pressure difference. The apparatus may provide a compact arrangement while allowing the movable element to have a suitable travel path length within the conduit.
G01L 19/00 - Details of, or accessories for, apparatus for measuring steady or quasi-steady pressure of a fluent medium insofar as such details or accessories are not special to particular types of pressure gauges
G01L 13/04 - Devices or apparatus for measuring differences of two or more fluid pressure values using floats or liquids as sensing elements
Methods and apparatuses for indicating the presence of a threshold directional differential pressure between separated adjacent spaces. An inclined conduit contains at least one movable element that indicates whether the pressure difference between the two spaces is at least as high as a threshold pressure difference. The apparatus may include an on-board pitch indicator and a roll indicator which are used together to calibrate the apparatus and its installation. The apparatus may provide only one or more discrete number of pressure difference set points and be non-adjustable once installed. The inclined conduit may be non-rotatable relative to the baseplate, and the baseplate may be rotatable to change threshold pressure difference set points. The apparatus may provide a tamper-resistant indication of whether a threshold pressure differential is present.
Methods and apparatuses for indicating the presence of a directional differential pressure between separated adjacent spaces are provided. A differential pressure set point indicator may be configured to correlate multiple potential angles of inclination of an elongated conduit to respective threshold differential pressures between two spaces which generate net flow of fluid sufficient to cause a lightweight ball to move from one region of the conduit to an opposing region. The elongated conduit may be adjustable in length so as to accommodate installation of the device into walls of varying thickness. The device may include a sound attenuator that reduces noise upon impact of the ball with either end of the conduit. The device may also include a sealing material that is flexible yet firm enough to provide both a seal with the exterior surface of the conduit and support for the conduit when oriented in a tilted configuration.
An apparatus for indicating the presence of a threshold directional differential pressure between separated adjacent spaces includes a first conduit and an inclined second conduit containing at least one movable element that indicates a threshold pressure difference between the two spaces. The apparatus may provide a compact arrangement while allowing the movable element to have a suitable travel path length within the second conduit. The travel path may include a first stop and a second stop. An imaginary axis or plane passing through a center of a first conduit may intersect the travel path between the first stop and the second stop.
G01L 19/00 - Details of, or accessories for, apparatus for measuring steady or quasi-steady pressure of a fluent medium insofar as such details or accessories are not special to particular types of pressure gauges
G01L 13/04 - Devices or apparatus for measuring differences of two or more fluid pressure values using floats or liquids as sensing elements
Methods and apparatuses for indicating the presence of a threshold directional differential pressure between separated adjacent spaces. An inclined conduit contains at least one movable element that indicates whether the pressure difference between the two spaces is at least as high as a threshold pressure difference. The apparatus may provide a compact arrangement while allowing the movable element to have a suitable travel path length within the conduit.
G01L 13/04 - Devices or apparatus for measuring differences of two or more fluid pressure values using floats or liquids as sensing elements
F15B 15/28 - Means for indicating the position, e.g. end of stroke
G01C 9/34 - Measuring inclination, e.g. by clinometers, by levels by using liquids in closed containers partially filled with liquid so as to leave a gas bubble of the tubular type, i.e. for indicating the level in one direction only
G01F 1/38 - Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using mechanical effects by measuring pressure or differential pressure the pressure or differential pressure being created by the use of flow constriction the pressure or differential pressure being measured by means of a movable element, e.g. diaphragm, piston, Bourdon tube or flexible capsule
G01L 9/10 - Measuring steady or quasi-steady pressure of a fluid or a fluent solid material by electric or magnetic pressure-sensitive elementsTransmitting or indicating the displacement of mechanical pressure-sensitive elements, used to measure the steady or quasi-steady pressure of a fluid or fluent solid material, by electric or magnetic means by making use of variations in inductance
G01L 13/02 - Devices or apparatus for measuring differences of two or more fluid pressure values using elastically-deformable members or pistons as sensing elements
Methods and apparatuses for indicating the presence of a threshold directional differential pressure between separated adjacent spaces. An inclined conduit contains at least one movable element that indicates whether the pressure difference between the two spaces is at least as high as a threshold pressure difference. The apparatus may include an on-board pitch indicator and a roll indicator which are used together to calibrate the apparatus and its installation. The apparatus may provide only one or more discrete number of pressure difference set points and be non-adjustable once installed. The inclined conduit may be non-rotatable relative to the baseplate, and the baseplate may be rotatable to change threshold pressure difference set points. The apparatus may provide a tamper-resistant indication of whether a threshold pressure differential is present.
G01L 13/00 - Devices or apparatus for measuring differences of two or more fluid pressure values
G01L 13/02 - Devices or apparatus for measuring differences of two or more fluid pressure values using elastically-deformable members or pistons as sensing elements
G01L 13/04 - Devices or apparatus for measuring differences of two or more fluid pressure values using floats or liquids as sensing elements
G01P 13/00 - Indicating or recording presence or absence of movementIndicating or recording of direction of movement
19.
Directional differential pressure detector having a differential pressure set point indicator
Methods and apparatuses for indicating the presence of a threshold directional differential pressure between separated adjacent spaces. A conduit contains at least one movable element that indicates whether the pressure difference between the two spaces is at least as high as a threshold pressure difference. The apparatus is adjustable to have different threshold set points by adjusting the pivot arm inclination relative to a horizontal plane.
G01P 13/00 - Indicating or recording presence or absence of movementIndicating or recording of direction of movement
G01C 9/34 - Measuring inclination, e.g. by clinometers, by levels by using liquids in closed containers partially filled with liquid so as to leave a gas bubble of the tubular type, i.e. for indicating the level in one direction only
Methods and apparatuses for indicating the presence of a threshold directional differential pressure between separated adjacent spaces. A conduit contains at least one movable element that indicates whether the pressure difference between the two spaces is at least as high as a threshold pressure difference. The apparatus is adjustable to have different threshold set points by adjusting the pivot arm inclination relative to a horizontal plane.
B60C 23/04 - Signalling devices actuated by tyre pressure mounted on the wheel or tyre
G10L 19/10 - Determination or coding of the excitation functionDetermination or coding of the long-term prediction parameters the excitation function being a multipulse excitation
G01L 13/00 - Devices or apparatus for measuring differences of two or more fluid pressure values
Methods and apparatuses for indicating the presence of a threshold directional differential pressure between separated adjacent spaces. A conduit contains at least one movable element that indicates whether the pressure difference between the two spaces is at least as high as a threshold pressure difference. The apparatus is adjustable to have different threshold set points by adjusting the pivot arm inclination relative to a horizontal plane.
G01L 13/00 - Devices or apparatus for measuring differences of two or more fluid pressure values
G01L 13/02 - Devices or apparatus for measuring differences of two or more fluid pressure values using elastically-deformable members or pistons as sensing elements
G01L 13/04 - Devices or apparatus for measuring differences of two or more fluid pressure values using floats or liquids as sensing elements
22.
Directional differential pressure detector for indicating potential or actual directional air flow
Methods and apparatuses for indicating the presence of a threshold directional differential pressure between separated adjacent spaces. A conduit contains at least one movable element that indicates whether the pressure difference between the two spaces is at least as high as a threshold pressure difference. The apparatus is adjustable to have different threshold set points by adjusting the pivot arm inclination relative to a horizontal plane.
An apparatus indicates the presence of a threshold directional differential pressure between separated adjacent spaces. A conduit contains a movable element that indicates whether the pressure difference between the two spaces is at least as high as a threshold pressure difference. The apparatus is adjustable to have different threshold set points by adjusting the conduit inclination. The conduit may be rotatable about an axis of rotation which is transverse to a barrier, and the conduit may be rotatable along a plane. The apparatus may include a pitch level configured to indicate whether the apparatus is oriented correctly with respect to pitch.
G01L 19/10 - Means for indicating or recording, e.g. for remote indication mechanical
G01L 19/00 - Details of, or accessories for, apparatus for measuring steady or quasi-steady pressure of a fluent medium insofar as such details or accessories are not special to particular types of pressure gauges
G01C 9/02 - Measuring inclination, e.g. by clinometers, by levels Details
G01L 13/00 - Devices or apparatus for measuring differences of two or more fluid pressure values
G01P 13/00 - Indicating or recording presence or absence of movementIndicating or recording of direction of movement
G01L 13/04 - Devices or apparatus for measuring differences of two or more fluid pressure values using floats or liquids as sensing elements
G01P 13/02 - Indicating direction only, e.g. by weather vane
09 - Scientific and electric apparatus and instruments
Goods & Services
Environmental monitoring system comprised of meters and sensors that measure pressure, humidity, temperature and includes alarm and reporting functions; Flow meters; Pressure indicators
Methods and apparatuses for indicating the presence of a directional differential pressure between separated adjacent spaces are provided. A differential pressure set point indicator may be configured to correlate multiple potential angles of inclination of an elongated conduit to respective threshold differential pressures between two spaces which generate net flow of fluid sufficient to cause a lightweight ball to move from one region of the conduit to an opposing region. The elongated conduit may be adjustable in length so as to accommodate installation of the device into walls of varying thickness. The device may include a sound attenuator that reduces noise upon impact of the ball with either end of the conduit. The device may also include a sealing material that is flexible yet firm enough to provide both a seal with the exterior surface of the conduit and support for the conduit when oriented in a tilted configuration.
Methods and apparatuses for indicating the presence of a threshold directional differential pressure between separated adjacent spaces. A conduit contains a movable element that indicates whether the pressure difference between the two spaces is at least as high as a threshold pressure difference. The apparatus is adjustable to have different threshold set points by adjusting the pivot arm inclination. The device may include at least two pivot axes. A rotating base may rotate relative to the barrier or wall, and a pivot arm may be attached and rotate relative to the rotating base. With the rotating base set at a first rotation angle, the pivot arm may be adjustable within a single plane. When the rotating base is set at a second rotation angle, the pivot arm may be adjustable within a different single plane. The device may include a single pivot axis where a pivot arm is parallel to the wall and rotates about a horizontal axis perpendicular to the wall.
G01P 13/00 - Indicating or recording presence or absence of movementIndicating or recording of direction of movement
G01L 19/10 - Means for indicating or recording, e.g. for remote indication mechanical
G01L 19/00 - Details of, or accessories for, apparatus for measuring steady or quasi-steady pressure of a fluent medium insofar as such details or accessories are not special to particular types of pressure gauges
G01C 9/02 - Measuring inclination, e.g. by clinometers, by levels Details
G01L 13/00 - Devices or apparatus for measuring differences of two or more fluid pressure values
G01L 13/04 - Devices or apparatus for measuring differences of two or more fluid pressure values using floats or liquids as sensing elements
G01P 13/02 - Indicating direction only, e.g. by weather vane
30.
Directional differential pressure detector having inclination adjustment between two conduits
Methods and apparatuses for indicating the presence of a directional differential pressure between separated adjacent spaces are provided. A differential pressure set point indicator with integral calibration sensing the earth's gravitational horizontal or vertical planes may be configured to correlate multiple potential angles of inclination of a conduit located on one side of a wall to respective threshold differential pressures between two spaces which generate net flow of fluid sufficient to cause a lightweight ball to move from one region of the conduit to an opposing region. The inclination of the conduit may be adjusted through a rotatable configuration similar to a turret-type arrangement.
G01P 13/00 - Indicating or recording presence or absence of movementIndicating or recording of direction of movement
G01L 13/02 - Devices or apparatus for measuring differences of two or more fluid pressure values using elastically-deformable members or pistons as sensing elements
Methods and apparatuses for indicating the presence of a directional differential pressure between separated adjacent spaces are provided. A differential pressure set point indicator may be configured to correlate multiple potential angles of inclination of an elongated conduit to respective threshold differential pressures between two spaces which generate net flow of fluid sufficient to cause a lightweight ball to move from one region of the conduit to an opposing region. The elongated conduit may be adjustable in length so as to accommodate installation of the device into walls of varying thickness. The device may include a sound attenuator that reduces noise upon impact of the ball with either end of the conduit. The device may also include a sealing material that is flexible yet firm enough to provide both a seal with the exterior surface of the conduit and support for the conduit when oriented in a tilted configuration.
Methods and apparatuses for indicating the presence of a directional differential pressure between separated adjacent spaces are provided. A differential pressure set point indicator may be configured to correlate multiple potential angles of inclination of an elongated conduit to respective threshold differential pressures between two spaces which generate net flow of fluid sufficient to cause a lightweight ball to move from one region of the conduit to an opposing region. The elongated conduit may be adjustable in length so as to accommodate installation of the device into walls of varying thickness. The device may include a sound attenuator that reduces noise upon impact of the ball with either end of the conduit. The device may also include a sealing material that is flexible yet firm enough to provide both a seal with the exterior surface of the conduit and support for the conduit when oriented in a tilted configuration.
Methods and apparatuses for indicating the presence of a threshold directional differential pressure between separated adjacent spaces. A conduit contains a movable element that indicates whether the pressure difference between the two spaces is at least as high as a threshold pressure difference. The apparatus is adjustable to have different threshold set points by adjusting the pivot arm inclination. The device may include at least two pivot axes. A rotating base may rotate relative to the barrier or wall, and a pivot arm may be attached and rotate relative to the rotating base. With the rotating base set at a first rotation angle, the pivot arm may be adjustable within a single plane. When the rotating base is set at a second rotation angle, the pivot arm may be adjustable within a different single plane. The device may include a single pivot axis where a pivot arm is parallel to the wall and rotates about a horizontal axis perpendicular to the wall.
G01L 13/00 - Devices or apparatus for measuring differences of two or more fluid pressure values
G01L 13/04 - Devices or apparatus for measuring differences of two or more fluid pressure values using floats or liquids as sensing elements
G01L 19/08 - Means for indicating or recording, e.g. for remote indication
G01P 5/02 - Measuring speed of fluids, e.g. of air streamMeasuring speed of bodies relative to fluids, e.g. of ship, of aircraft by measuring forces exerted by the fluid on solid bodies, e.g. anemometer
G01P 13/00 - Indicating or recording presence or absence of movementIndicating or recording of direction of movement
G01P 13/04 - Indicating positive or negative direction of a linear movement or clockwise or anti-clockwise direction of a rotational movement
Methods and apparatuses for indicating the presence of a threshold directional differential pressure between separated adjacent spaces. A conduit contains at least one movable element that indicates whether the pressure difference between the two spaces is at least as high as a threshold pressure difference. The apparatus is adjustable to have different threshold set points by adjusting the pivot arm inclination relative to a horizontal plane.
G01L 13/00 - Devices or apparatus for measuring differences of two or more fluid pressure values
G01L 13/02 - Devices or apparatus for measuring differences of two or more fluid pressure values using elastically-deformable members or pistons as sensing elements
G01L 13/04 - Devices or apparatus for measuring differences of two or more fluid pressure values using floats or liquids as sensing elements
Methods and apparatuses for indicating the presence of a threshold directional differential pressure between separated adjacent spaces. A conduit contains a movable element that indicates whether the pressure difference between the two spaces is at least as high as a threshold pressure difference. The apparatus is adjustable to have different threshold set points by adjusting the pivot arm inclination. The device may include at least two pivot axes. A rotating base may rotate relative to the barrier or wall, and a pivot arm may be attached and rotate relative to the rotating base. With the rotating base set at a first rotation angle, the pivot arm may be adjustable within a single plane. When the rotating base is set at a second rotation angle, the pivot arm may be adjustable within a different single plane. The device may include a single pivot axis where a pivot arm is parallel to the wall and rotates about a horizontal axis perpendicular to the wall.
A system for mounting a differential pressure indication device for indicating a presence of a directional differential pressure between a first space and a second space separated from tire first space by a barrier is provided. The system may include a base configured to be mounted against the barrier, where the base includes a receptacle configured to removably receive the pressure indication device. The system may include at least one mounting fastener configured to removably secure the differential pressure indication device within the receptacle. The system may include a pitch adjuster configured to secure the base to the barrier, where movement of the pitch adjuster is configured to adjust a spacing between a portion of the base and the barrier to adjust the orientation of the base with respect to pitch.
Methods and apparatuses for indicating the presence of a threshold directional differential pressure between separated adjacent spaces. An inclined conduit contains at least one movable element that indicates whether the pressure difference between the two spaces is at least as high as a threshold pressure difference. The apparatus may include an on-board pitch indicator and a roll indicator which are used together to calibrate the apparatus and its installation. The apparatus may provide only one or more discrete number of pressure difference set points and be non-adjustable once installed. The inclined conduit may be non-rotatable relative to the baseplate, and the baseplate may be rotatable to change threshold pressure difference set points. The apparatus may provide a tamper-resistant indication of whether a threshold pressure differential is present.
G01L 13/00 - Devices or apparatus for measuring differences of two or more fluid pressure values
G01L 13/02 - Devices or apparatus for measuring differences of two or more fluid pressure values using elastically-deformable members or pistons as sensing elements
G01L 13/04 - Devices or apparatus for measuring differences of two or more fluid pressure values using floats or liquids as sensing elements
G01P 13/00 - Indicating or recording presence or absence of movementIndicating or recording of direction of movement
Methods and apparatuses for indicating the presence of a threshold directional differential pressure between separated adjacent spaces. An inclined conduit contains at least one movable element that indicates whether the pressure difference between the two spaces is at least as high as a threshold pressure difference. The apparatus may provide a compact arrangement while allowing the movable element to have a suitable travel path length within the conduit.
F15B 15/28 - Means for indicating the position, e.g. end of stroke
G01C 9/34 - Measuring inclination, e.g. by clinometers, by levels by using liquids in closed containers partially filled with liquid so as to leave a gas bubble of the tubular type, i.e. for indicating the level in one direction only
G01F 1/38 - Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using mechanical effects by measuring pressure or differential pressure the pressure or differential pressure being created by the use of flow constriction the pressure or differential pressure being measured by means of a movable element, e.g. diaphragm, piston, Bourdon tube or flexible capsule
G01L 9/10 - Measuring steady or quasi-steady pressure of a fluid or a fluent solid material by electric or magnetic pressure-sensitive elementsTransmitting or indicating the displacement of mechanical pressure-sensitive elements, used to measure the steady or quasi-steady pressure of a fluid or fluent solid material, by electric or magnetic means by making use of variations in inductance
G01L 13/02 - Devices or apparatus for measuring differences of two or more fluid pressure values using elastically-deformable members or pistons as sensing elements
G01L 13/04 - Devices or apparatus for measuring differences of two or more fluid pressure values using floats or liquids as sensing elements
