Protractors capable of high precision calculations

Protractor is an accurate device that allows measuring the angles of inclination of surfaces in relation to each other. Such information is necessary for installation according to the drawing of planes, elements of various structures, parts, as well as component parts of equipment. Some protractors are capable of making high-precision calculations over a considerable distance. All measurements are made in degrees using a special scale equipped with a mechanical pointer. This definition works for both vernier and electric display, whose use depends on the type of device.

Inclinometer characteristics

By definition, an inclinometer is a device designed to build a plane parallel to the horizon. If there are additional elements on the device, it can be used to determine vertical lines, in accordance with the readings of the plumb line, or specified angles of inclination. This device is otherwise called a level and is divided by design type into:

• bubble;
• optical;
• aquatic;
• laser.

It is noteworthy that in order to increase the functionality on some devices, elements are used that characterize two types of inclinometer at once. An example is a bubble level equipped with a laser pointer (or two), which allows you to mark a given point (or line) instantly and at a considerable distance.

The equipment of individual inclinometers includes several measuring instruments at once, which allows them to increase their functional characteristics. Such devices are used to compose complex calculations with several input parameters. They find their application in the construction of structures of complex geometric configuration.

Most popular goniometers 2020

The most relevant, today, direction of using protractors is construction sites. There are angles of all kinds of sizes and degrees of inclination, which need strict adjustment. Here, each element needs a clear statement in relation to the surrounding space, and it is impossible to provide template accuracy with an ordinary eye. Therefore, for measurements and calculations, goniometers of various designs are used, capable of providing accurate data in any conditions. Several models can be distinguished among the sales leaders for 2020.

BOSCH GAM220MF professional

This digital angle meter is designed for professional use and is used to measure both internal and external angles with maximum accessibility. It is distinguished by the most versatile range of functionalities.The error in measuring the angles of this device is within 0.1^about (degrees), which gives an error not exceeding 1.8 mm per linear meter. The popularity of this device brings it to a leading position in terms of sales.

The presented goniometer is maximally provided with the necessary set of tools, which allows taking measurements in the most inaccessible places. Its complete set provides a number of positive qualities that significantly expand the functionality.

• simple and understandable control for everyone;
• memorization function;
• automatic calculation function;
• acoustic signal;
• when taking measurements overhead, the indication flips in automatic mode.

• high price of the device.

When working with the GAM220MF, it is possible to calculate both single and double angles in automatic mode (without using any auxiliary tools). The memorization function allows you to fix frequently encountered parameters, which makes it possible to transfer the same data from one position to another. Among other things, an extended ruler is included in the package, allowing you to carry out calculations in hard-to-reach places.

BOSCH GIM60L professional

This device is considered a novelty, since it appeared on the market relatively recently, but its functional characteristics very quickly found supporters among specialists. Its capabilities suggest use over large areas. The projection of the laser point, incorporated in the design of the device, allows you to project an inclination at a distance of up to 30 meters. Powerful magnets allow holding the goniometer on the contact plane, and special belts provided in the complete set are intended for fixing on the surface of non-magnetic materials.

• the presence of a laser pointer;
• tilting mechanism;
• sound alert function;
• unit switch;
• automatic flip of indication;
• magnetic surface.

• lack of the ability to transfer duplicate parameters.

Another design feature is the tilting mechanism, which allows fine adjustment on curved surfaces. In this case, as a measuring "0^about»(Zero), you can select any calculated point, and adjust the angles manually.

The audible alarm function allows you to determine the target position without the need for visual verification. In addition to this, measurements can be calculated not only in "^about"(Degrees), but also in"% "(percent), by changing the position of the switch. A convenient option is the automatic flip display mode, which eliminates the need to distinguish between inverted values.

BOSCH DNM 120 L professional

This electronic model of an inclinometer with a digital display is designed for taking accurate readings from the angles of inclination of planes or setting a horizontal line. Here it is possible to carry out the indication, both in degrees and in percent. The calculation error is maximum 0.05^about (degrees). The existing acoustic signal gives alerts when reaching the horizontal or angle of 90^about (degrees). The two bubble levels are set to determine the horizon and plumb line respectively.

• large numbers;
• inclined display;
• automatic flip of indication;
• fixing the results by pressing a button.

• lack of a device for measuring angles.

The device body is made of high strength aluminum profile. The included extended ruler allows measurements to be taken in poorly accessible areas.

Video review of the BOSCH DNM 120 L inclinometer:

BOSCH PAM 220

This electronic goniometer provides reliable results for all measurements with an accuracy of 0.2^about (degrees).The device uses a calculation function that allows accurate calculations for both single and double slope angles. The complete set provides an extension line that allows you to aim in places with difficult accessibility.

• "Hold" button allowing to save the current data;
• additional turn of the corner by 180^about (degrees) when using an extended ruler;
• display backlight for easy reading
• manual leveling for both vertical and horizontal levels.

• angle measurement error - 0.2^about.

In addition, the device is provided with a calculation function that allows instant calculations and a memory function that allows you to store repeated parameters. The lower cost of the model attracts private owners.

Video review of the protractor BOSCH PAM 220:

Skil 0580AA

This goniometer model from this company has earned the users the most attractive price-quality ratio. Also, attention is drawn to the compact size of the device, which allows you to keep it close at hand for accurate measurements. The main purpose of the device is construction sites, where it allows marking with high accuracy, eliminating the possibility of errors during the installation of elements of complex configuration.

Protractor settings allow you to take readings from angles with a turn from 0 to 220 degrees. Skil 0580AA's wide range of applications allows solving a wide range of tasks

The device can be used in many processes:

• the device of interior partitions;
• alignment of the ceiling line;
• design of arches in partitions;
• setting up window slopes;
• fastening of decorative elements.

• lack of a laser pointer.

The simplicity of the design presupposes simple control, which is carried out using two buttons. One of the convenient advantages is the fixation of measurement results on the display, which is carried out by pressing a special button.

Protractor video review:

ADA AngleMeter

A goniometer model from the growing company ADA, which produces diagnostic, measuring and other equipment, also hit the top sales of 2020. The device presented by her is made in the form of a digital angle meter, capable of making quick measurements. The convenient design allows for a wide functional potential.

• rotation of measured angles is available in the range from 0 to 180 degrees;
• the maximum error is 0.1^about;
• automatic shutdown occurs after 3 minutes;
• the length of the folded device is 250mm;
• working weight is 0.7 kg.

• the device is not suitable for large areas.

The presented goniometer has an aluminum alloy body, which guarantees its light weight with sufficient strength. The simplicity of the design contributes to the rapid implementation of the task. The AngleMeter model has gained popularity among consumers due to its attractive price.

Video review of the AngleMeter model:

ADA ProDigit30

Another top selling product from ADA is the ProDigit30 miniature inclinometer. He received a solid case, the base of which is marked with a millimeter scale. In addition to the attractive price, this device is distinguished by its durability and resistance to significant loads. Brightly lit digital display positioned for easy reading.

• electronic calibration;
• magnetic base;
• acoustic signal;
• display backlight;
• aluminium case;
• convenient case.

• lack of a device for measuring angles.

This model is equipped with a laser pointer that allows you to measure at a considerable distance, the built-in emitter projects a point at a given location.In addition, the case is equipped with reinforced magnets that can hold the device on the contact surface. A special tripod mount allows the device to be used as a point level.

Interesting: it is quite simple to check the inclinometer setting, for this you need to remove the parameters from a certain position. After that, the device must be turned 180 degrees and read again, if they coincide with the previous values, then the device setting is correct.

Popular protractors 2020 designed for narrow specialization

In addition to construction, goniometers are used in many other specialties, where the accuracy of plane alignment is important. Measurements with these devices are important in joinery and carpentry, because deviations in the alignment of their products can lead not only to problems in operation, but also to domestic injuries. In addition, goniometers are used by physicians, topographers and even astronomers.

However, in this situation, narrow specialists use devices of a different design. There is no need to use multifunctional equipment for their measurement technique. But the requirements for the accuracy of matching angles are much higher for this group of professionals. For this reason, they use devices that are not structurally associated with inclinometers in their work. Such devices are divided into several groups:

Vernier device

The measuring device is applied to the plane at the place where it is necessary to measure the desired angle, while the ruler and the body of the device are superimposed on the sides of the corner. Next, you need to count the degrees located on the main scale, up to the point of contact with zero on the vernier field, in order to determine the degrees. Then, moving along the vernier scale, they find the division that coincides with the desired mark on the main scale, lining it up in a common straight line to determine the minutes.

Optical instrument

There is a movable ruler here, which must be moved so that it forms the required angle with the fixed part. After that, a special ring is fixed, which is used for clamping. Further, it is necessary to take into account that both the disk and the magnifying glass of the device depend in construction on the movable element, and, therefore, the desired position is determined from them. The movement of the disc markings is observed through a magnifying glass, aligning it with the mark on the plate, after which the instrument readings are taken.

Electronic protractor

This is a device with a digital indication required for measuring angles. For convenience, each arm of the fixture was provided with markings, allowing you to set the exact value for the marks on the contact planes. The electronic device of the protractor has special functions that allow both reset and freezing of the results obtained, which adds convenience in work. At the same time, the accuracy of the device is at a fairly high level, the error is only 0.3^about (degrees).

Pointer protractor

This is the name of a quadrant goniometer equipped with an elongated guide on which a scale is applied. Such a device has found application when cutting large slabs. It is used to measure both internal and external angles from 0 to 180^about (degrees). Such devices are made of stainless steel or ordinary steel with an anti-corrosion coating.

Recommendations

Inclinometer designs equipped with automatic systems allow you to orient yourself faster and perform more complex actions even in confined spaces. For example, an electronic protractor is ready to report the measurement result immediately after the ruler touches the surface. At the same time, the optics need to be initially installed on a horizontal surface to avoid level errors. And mechanical devices additionally require certain knowledge from the performer in order to be able to perform calculations.

For this reason, the most popular and widely available are protractors equipped with a large number of different options.When buying any measuring device, it is necessary to check the regulatory documents in order to be able to check or adjust it.