A spirit level, bubble level, or simply a level, is an instrument designed to indicate whether a surface is horizontal (level) or vertical ( plumb).

Replacement Level Glass Vial Spirit Bubble Level Vial - Etsy UK

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. Give us a call at 800.550.8425 and describe your situation. We will review the options and how we can help you. 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." William B Fell (1940-08-01). "Machinist's precision level (US2316777A)". Google Patents . Retrieved 2 August 2018. Buyers are responsible for return postage costs. If the item is not returned in its original condition, the buyer is responsible for any loss in value.

Adjustment of the spirit level is performed by successively rotating the level and moving the bubble tube within its housing to take up roughly half of the discrepancy, until the magnitude of the reading remains constant when the level is flipped. 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. Ground spirit level vials are generally used in applications which require a higher degree of accuracy than is achievable with the lower cost plastic vials. We manufacture these in a wide range of sizes and sensitivities and produce many standard types as well as custom made products for OEM's. We have an advanced production facility which enables us to produce extremely high quality vials in small or large quantities at very competitive prices. Applications and Features Can be used as replacement for spirit bubble levels, spare parts or on their own - Vial cylindrical (Tubular Vial)

Spirit Spirit Levels | Measuring Tools | Screwfix Spirit Spirit Levels | Measuring Tools | Screwfix

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. Equipment Database Menu". Sli.unimelb.edu.au. 1998-10-19. Archived from the original on July 10, 2009 . Retrieved 2009-07-29. 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. x Glass Filled (50%), Reinforced, Super Nylon Pan Head, Crosshead Machine Screws, Nuts & Bolts, Washers, Various Sizes and LengthsCombining 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 ] 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. 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. 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!) A variant of the linear spirit level is the bull's eye level: a circular, flat-bottomed device with the liquid under a slightly convex glass face with a circle at the center. It serves to level a surface across a plane, while the tubular level only does so in the direction of the tube.