The invention relates to a device for the display and/or control of fluids, comprising at least one fluid connection (30, 32), which opens out into a riser pipe (2), which is at least partially surrounded by a frame (8), in the front wall (6) of which there is a recess (40), which releases a viewing area (4) for monitoring the fluid level in the riser pipe (2), characterised in that a cover is provided which can be mounted on the recess (40) so as to be removable and forms a protection window (42) protecting the riser pipe (2) from outside against mechanical influences in the viewing area (4).

The invention relates to a device for the display and/or control of fluids, comprising at least one fluid connection (30, 32), which opens out into a riser pipe (2), which is at least partially surrounded by a frame (8), in the front wall (6) of which there is a recess (40), which releases a viewing area (4) for monitoring the fluid level in the riser pipe (2), characterised in that a cover is provided which can be mounted on the recess (40) so as to be removable and forms a protection window (42) protecting the riser pipe (2) from outside against mechanical influences in the viewing area (4).

A flowmeter (5) is provided having a sensor assembly (10) connected to meter electronics (20), wherein the sensor assembly (10) comprises at least one driver (104) and at least one pickoff (105) and a variably modulated conduit (300) configured to change a flow area (304) therein.

It is described herein an article of manufacture comprising a housing, with a wing shaped support attached to the housing's outer surface in a first direction, and a second wing attached to and extending from the housing outer surface in a second direction opposite the first direction. The first wing and the second wing may have a degree of curvature which can be formed by the respective wing that is greater than 12° for a one inch arc length. The housing may be capable of passing light in a visible wavelength from a cavity in the housing when a light source is disposed within said cavity.

A Liquid Flow Indicator Device comprising: a sight glass having one or more cages positioned around the sight glass for containing one or more indicator objects, so a user can see the indicator objects, which are visible to the user looking through the sight glass, thereby providing visual notification to the user. When the liquid is flowing through the cages and also the sight glass, the indicator objects will float around inside the cage, thereby providing visual notification to the user that the liquid is flowing through the cage and the sight glass. The indicator objects can also make a sound when the liquid flows through the sight glass and through the cage by banging around inside the cage, thereby providing audio notification to the user that the liquid is flowing through the sight glass. As such, this invention provides Audio notifications and/or Visual notifications regarding the flow of liquid. A fluid transport system and a method of using the device.

A Liquid Flow Indicator Device comprising: a sight glass having one or more cages positioned around the sight glass for containing one or more indicator objects, so a user can see the indicator objects, which are visible to the user looking through the sight glass, thereby providing visual notification to the user. When the liquid is flowing through the cages and also the sight glass, the indicator objects will float around inside the cage, thereby providing visual notification to the user that the liquid is flowing through the cage and the sight glass. The indicator objects can also make a sound when the liquid flows through the sight glass and through the cage by banging around inside the cage, thereby providing audio notification to the user that the liquid is flowing through the sight glass. As such, this invention provides Audio notifications and/or Visual notifications regarding the flow of liquid. A fluid transport system and a method of using the device.

A flow rate assembly can include a fluid flow interface portion having a front facing wall and a back facing wall. The flow interface portion can include an inlet passage within the fluid flow interface portion, an outlet passage within the fluid flow interface portion, at least one inlet aperture extending through the front facing wall of the fluid flow interface portion into the inlet passage, and at least one outlet aperture extending through the back facing wall of the fluid flow interface portion into the outlet passage. In some cases, the fluid flow interface portion includes a plug forming at least a portion of the inlet passage.

A flow rate assembly can include a fluid flow interface portion having a front facing wall and a back facing wall. The flow interface portion can include an inlet passage within the fluid flow interface portion, an outlet passage within the fluid flow interface portion, at least one inlet aperture extending through the front facing wall of the fluid flow interface portion into the inlet passage, and at least one outlet aperture extending through the back facing wall of the fluid flow interface portion into the outlet passage. In some cases, the fluid flow interface portion includes a plug forming at least a portion of the inlet passage.

A nitrous oxide gas mixer includes at least one mixing chamber having at least one nitrous oxide gas connection and at least one oxygen gas connection for introduction of oxygen gas and nitrous oxide gas and at least one flow rate controller, by which a volume flow of the two gases can be respectively adjusted separately and/or together. At least one O.sub.2 emergency button is mounted to the mixing chamber for emergency flooding the mixing chamber with oxygen gas and/or with ambient air.

A nitrous oxide gas mixer includes at least one mixing chamber having at least one nitrous oxide gas connection and at least one oxygen gas connection for introduction of oxygen gas and nitrous oxide gas and at least one flow rate controller, by which a volume flow of the two gases can be respectively adjusted separately and/or together. At least one O.sub.2 emergency button is mounted to the mixing chamber for emergency flooding the mixing chamber with oxygen gas and/or with ambient air.