Popular models
The modern market for measuring equipment presents a wide range of geodetic tape measures. Below are the most popular samples, most often mentioned in the requests of Internet users.
The Chinese-made Matrix Master model corresponds to the second class of accuracy and is available with a measuring blade size of 12.5 mm x 50 m. The body of the product is made of impact-resistant plastic, and the handle has a two-component design and provides a comfortable grip. The model is equipped with a sharp tip that allows you to fix the device in the ground for long-distance measurements, and the measuring tape is covered with a polymer compound that is quite resistant to abrasion. The dimensions of the tape measure are 47x27x6 cm, the cost is 641 rubles.
You can see an overview of the GROSS 31480 geodetic tape measure below.
Features and scope
Unlike conventional construction and hydrogeological tape measures, the size of which is often limited to 10 meters, the geodetic model is distinguished by its long length, reaching 30, 50 and even 100 m. Moreover, 100-meter tapes are the most popular. There are also 20-meter samples, however, due to their insufficient length, they are much less often used by specialists.
All geodetic models are designed to work in extreme climatic conditions and are capable of operating in a temperature range of -40 to 50 degrees and 100 percent humidity. Moreover, thanks to the use of durable, but at the same time elastic materials, the tape is not afraid of knocks, breaks, strong bends and loops. Resistance to deformation is especially necessary when using the instrument on difficult terrain in difficult measuring conditions.
The scope of application of geodetic tape measures is quite wide. They are used to determine the distances between points located at a considerable distance from each other. The tool is indispensable for geodetic, cartographic and topographic works, as well as in construction and when surveying garden plots. It is used to measure age-related horizontal deformations of the land, determine the points of coordinates of various objects, carry out land surveying and spatial-geometric measurements with further application of the results to plans and maps.
In addition to geodesy and cartography, roulette is widely used in the development of territories and the formation of landscapes, as well as in athletics competitions, where it is used to measure the flight range of a spear, hammer or ball.
Design
Geodetic tape is a measuring device consisting of an open or closed shockproof housing, a built-in drum and a measuring tape wound around it. The reel is equipped with a comfortable handle that allows you to wind the measuring tape manually, or it is equipped with an automatic twisting system, which greatly facilitates the operation of tape measures when measuring long distances.
Hand drum systems are less convenient and require additional time to rewind the web. Models are produced with different ratios of revolutions, of which the most common are 1: 3 and 1: 5, meaning that in one rotation of the handle the drum makes 3 or 5 revolutions. Almost all models are equipped with a sharp peg, which, if necessary, is stuck into the ground and securely fixes the device. Roulette handles are often two-piece and feature ergonomic, comfortable shapes.
The measuring tape of tape measures can be from 125 mm to 2 cm wide and is made of metal or PVC.A scale is applied on its surface by etching, engraving or embossing, which does not fade or wear off during operation. The durability of the markings is due to the presence of a thin wear-resistant coating, which is always present on all types of belts. Polyamide, anticorrosive phosphate layer, synthetic resins, high-strength enamel or transparent wear-resistant varnish are used as a protective layer. The end of the measuring tape is often equipped with a special ring that allows the web to hook onto a peg driven into the ground, which is the starting point of reference.