Facts To Know About A Slope Indicator

By Barbara Burns


There are many applications in real life situations that require the measurement of the slope, elevation, or depression of an object in respect to gravity. The instrument that is used for this purpose is referred to as a slope indicator. Other names used to refer to the instrument are level gauge, declinometer, gradient meter, slope alert, and roll indicator among several other names.

When measuring a slope of an object using a declinometers, both the positive and negative slopes are measured. That implies that measurements are taken as seen when an observer is looking both upwards and downwards. Units of measurements used are usually three in number and they include degrees, topo, and percentage. Astrolabe is the predecessor inclinometer from which the modern version evolved. Astrolabes were used during Renaissance.

Modern-day declinometers have a very high level of accuracy. Accuracy in these instruments is dependent on various factors. The main factors are angle range and technology incorporated in the device. Those with modern technology can reach output resolutions of 0.0001 degrees while typical accuracy is placed at 0.01 to 2 degrees in either positive or negative direction. Besides technology, other factors that determine accuracy are hysteresis, sensor linearity, sensitivity, temperature, and repeatability.

Modern devices incorporate different technologies. In most cases, the gadgets operate based on generation of an artificial horizon with respect to which measurement of angular tilt is done. Roll indicators that employ this technology are incorporated in flight controls of aircrafts, cameras, specialty switches, and automobile security systems. When one wants to buy tilt sensors, two key factors to keep in mind are tilt angle range and number of axes in the device.

Modern life finds many uses for inclinometers. These devices are valuable in the monitoring of subsurface movements and/or deformations. In this application, they are utilized in the detection of motion to establish if motion is accelerating, constant, or responding to countermeasures. Also, deformations that are within limits can be told through the use of the instrument. This assists in ensuring that subsurface motion does not affect adjacent structures.

After impoundment of a given area of land, it is important to verify the stability of structures such as upstream slopes, dam abutments, and dams. Inclinometers are instruments used for such verification. Horizontal inclinometers are also used to monitor settlement profiles of foundations, embankments, and other similar structures. Thus, it is obvious that these instruments have a lot of use in the construction industry and many other related industries.

An inclinometer is usually composed of two components, that is, the measurement system and the casing. The casing component enables access to subsurface measurements. It contains grooves within it that control the orientation of the sensor of the device and offer the whole system with a uniform surface from which measurement can be taken.

Various platforms can be used for the installation of inclinometer casings. Most common places and techniques of installation are fitting inside boreholes, embedding in fill, burying in trenches, attaching to structures, and casting into concrete. Some of the factors one should remember when buying casings are groove shape, casing diameter, and coupling style.




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