Replacement Level Glass Vial, Spirit Bubble Level, Accurate, with Nib, 35mm x 11mm - Green

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Equipment Database Menu". Sli.unimelb.edu.au. 1998-10-19. Archived from the original on July 10, 2009 . Retrieved 2009-07-29. Measuring and Marking Squares Rulers, Tape Rules Spirit Levels, Vials Marking Gauges Sliding Bevels Large Sliding Bevels Angolfast Angle Meter Dovetail Markers Chalk Line Marker Plumb Bobs Marking knives Stabbing Awls Purfling Cutter Wari Kebiki This change of mind return policy is in addition to, and does not affect your rights under the Australian Consumer Law including any rights you may have in respect of faulty items. To return faulty items see our Returning Faulty Items policy.

Spirit level - Wikipedia Spirit level - Wikipedia

Sensitivity is an important specification for a spirit level, as the device's accuracy depends on its sensitivity. The sensitivity of a level is given as the change of angle or gradient required to move the bubble by unit distance. If the bubble housing has graduated divisions, then the sensitivity is the angle or gradient change that moves the bubble by one of these divisions. 2mm (0.079in) is the usual spacing for graduations; on a surveyor's level, the bubble will move 2mm (0.079in) when the vial is tilted about 0.005 degree. For a precision machinist level with 2mm (0.079in) divisions, when the vial is tilted one division, the level will change 0.04mm (0.0016in) one meter from the pivot point, referred to by machinists as 5 tenths per foot. This terminology is unique to machinists and indicates a length of 5 tenths of 1 thousandth of an inch. [3] [4] Types [ edit ] Level tool being used to establish horizontality. Combining a spirit level with an optical telescope results in a tilting level or dumpy level. [5] These leveling instruments as used in surveying to measure height differences over larger distances. A surveyor's leveling instrument has a spirit level mounted on a telescope (perhaps 30 power) with cross-hairs, itself mounted on a tripod. The observer reads height values off two graduated vertical rods, one 'behind' and one 'in front', to obtain the height difference between the ground points on which the rods are resting. Starting from a point with a known elevation and going cross country (successive points being perhaps 100 meters (328ft) apart) height differences can be measured cumulatively over long distances and elevations can be calculated. Precise levelling is supposed to give the difference in elevation between two points one kilometer (0.62 miles) apart correct to within a few millimeters. [ citation needed] Alternatives [ edit ] The history of the spirit level was discussed in brief in an 1887 article appearing in Scientific American. [1] Melchisédech Thévenot, a French scientist, invented the instrument some time before February 2, 1661. [ citation needed] This date can be established from Thevenot's correspondence with scientist Christiaan Huygens. Within a year of this date the inventor circulated details of his invention to others, including Robert Hooke in London and Vincenzo Viviani in Florence. [ citation needed] It is occasionally argued that these "bubble levels" did not come into widespread use until the beginning of the 18th century, the earliest surviving examples being from that time, but Adrien Auzout had recommended that the Académie Royale des Sciences take "levels of the Thevenot type" on its expedition to Madagascar in 1666. [ citation needed] It is very likely that these levels were in use in France and elsewhere long before the turn of the century. [ citation needed] Sensitivity is used to indicate "the minimum volume of a gradient between a horizontal surface (or a vertical surface) forms with a level when a bubble of the level starts to move."A similar procedure is applied to more sophisticated instruments such as a surveyor's optical level or a theodolite and is a matter of course each time the instrument is set up. In this latter case, the plane of rotation of the instrument is levelled, along with the spirit level. This is done in two horizontal perpendicular directions. Give us a call at 800.550.8425 and describe your situation. We will review the options and how we can help you. A traditional carpenter's spirit level looks like a short plank of wood and often has a wide body to ensure stability, and that the surface is being measured correctly. In the middle of the spirit level is a small window where the bubble and the tube is mounted. Two notches (or rings) designate where the bubble should be if the surface is level. Often an indicator for a 45 degree inclination is included. [ citation needed] Line level [ edit ] Measuring elevation with a line level and measuring tape. Early tubular spirit levels had very slightly curved glass vials with constant inner diameter at each viewing point. These vials are incompletely filled with a liquid, usually a colored spirit or alcohol, leaving a bubble in the tube. They have a slight upward curve, so that the bubble naturally rests in the center, the highest point. At slight inclinations the bubble travels away from the marked center position. Where a spirit level must also be usable upside-down or on its side, the curved constant-diameter tube is replaced by an uncurved barrel-shaped tube with a slightly larger diameter in its middle. Ebisu has created a marking system which classifies sensitivity, precision, and precision for use, so that users can properly understand the quality of Ebisu's products without any misreading.

Replacement Level Glass Vial, Spirit Bubble Level, Clear with Replacement Level Glass Vial, Spirit Bubble Level, Clear with

These are handmade, do allow 0.4mm in diameter size fluctuation. We haven't found any with more than 0.35mm (at the max) variation though, in diameter. If you’ve already done that, your item hasn’t arrived, or it’s not as described, you can report that to Etsy by opening a case. This article needs additional citations for verification. Please help improve this article by adding citations to reliable sources. Unsourced material may be challenged and removed.

Making: We then specify the exact type of 'decoration' - the ceramic lines to indicate readings. These lines are then permanently baked for durability (you'd think we describing a cake baking recipe here!) International products have separate terms and are sold from abroad and may differ from local products including fit, age rating, and language of product, labeling, or instructions, or plugs (you may require an adapter). Precision is defined to indicate "a reading of a certain measuring instrument or a comprehensive satisfactory performance including accuracy and precision (minimized dispersion in the values of measurement)" in the "Glossary of Measurement" of JISZ8103 (Japanese Industrial Standard). Ebisu generally inspects precision on a flat surface board which is class 0 of JIS B7513; however, there is dispersion on frames and/or vials of levels in terms of processing; as well as structural error. Therefore, precision is shown so that users can understand that there may be a dispersion in true values within the range of "0°±precision" even if a measurement of 0° is read out.