Uncategorized Archive - Stahl-Libellen

Jewelry made of level vials – technology meets aesthetics

f.oppermann — Fri, 23 Jul 2021 13:09:13 +0000

All our handmade jewellery with colourful liquids offer a new and unique jewellery experience worldwide.
Dressy liquids!
Instead of gemstones and pearls, we have integrated liquids in different colors in our entire jewelry collection consisting of various rings and earrings.
Handcrafted, the various liquids are inserted to create unique pieces that have not been seen before. The perpetual movement of the liquid in the various vibrant hues is absolutely fascinating.
You need an unusual gift? For prices and more information, please send an e-mail to in**@************en.de or call 0711 36550827.

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About us

f.oppermann — Thu, 01 Jul 2021 13:34:23 +0000

PRECISION MADE IN GERMANY SINCE 1986
The company “Stahl Präzisionslibellen” was founded in 1986 by Hansjörg Stahl in Winterbach, near Stuttgart.
Even then, we specialized in the development and manufacture of precision circular levels / Bullseye levels / Bubble Levels and circular vials.
Today, as an owner-managed family company in the second generation, we produce circular levels and vials for applications in which high-precision and fast alignment is required.
Our customers are manufacturers of scales, industrial scales, laboratory scales and food scales. Our precise circular levels are also built into surveying devices, sensors, various geodetic instruments, geodesy measuring instruments, laser levels, tripods, lifting platforms, devices for wheel alignment, cranes, professional cameras, high-end loudspeakers and a wide variety of machines.

We would be very happy to manufacture the bubble level and bullseye level suitable for your application in your desired sensitivity and shape. We look forward to helping you. Please send us an e-mail or call us!

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Sensitivity Explained

f.oppermann — Thu, 01 Jul 2021 13:33:46 +0000

The French “Melchisédech Thévenot” developed a small glass tube filled with liquid that contained an air bubble and was slightly curved. The principle of today’s level was found – the foundation for easy alignment of objects was laid.
In measurement technology, a level is a hollow body filled with a liquid and a gas bubble for checking the horizontal or vertical position of an object. This means that the position of the gas bubble in the liquid shows the size and direction of the angle at which the object is inclined in relation to the horizontal plane. (Wikipedia)

Functionality

The cavity, in which the liquid and gas bubble are located, has a defined radius on the top so that the gas bubble always floats at the highest point due to its buoyancy. As a rule, two markings are made in the transparent body, on the left and right of the central position. If the gas bubble is exactly between the two markings and the level is correctly adjusted, the object to be tested is in the horizontal or vertical position. (Wikipedia)

Sensitivity of the circular level / Bullseye level / Bubble Level and circular vial

The sensitivity of a level or vial is defined as the change of angle or gradient required to move the bubble by a set distance (usually 2mm).
The sensitivity can be specified in two ways.
One possibility is to indicate the sensitivity of a level /vial with the angle in degrees (°), minutes (´) or seconds (´´) by which it has to be tilted so that the bubble moves 2 mm further (1 ° = 60 ´ = 3600´´).
Another possibility is the specification in mm / m. In this case, the height difference x in mm over a length of 1 m is decisive. The sensitivity always relates to a bubble path of 2 mm, unless otherwise specified.
The sensitivity is determined by the radius and directly related to the radius of curvature within the vials, which the bubble moves across. The longer the radius, the more sensitive the vial will be.

Conversion table for sensitivity per 2mm bubble path


Arc minutes	Arcseconds	Radius in mm	Inclination in degrees	Inclination in mm / m
5′	300”	1450mm	0,08°	1,40mm/m
6′	360”	1145mm	0,1°	1,75mm/m
8′	480”	820mm	0,13°	2,27mm/m
11′	660”	625mm	0,18°	3,14mm/m
17′	1020”	400mm	0,28°	4,89mm/m
25′	1500”	275mm	0,42°	7,33mm/m
30′	1800”	225mm	0,5°	9mm/m
40′	2400”	172 mm	0,66°	11,88mm/m

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