What is measuring?

Measuring is defined as the determination of the physical characteristics of an object (measured item) by practical comparison with known dimensions (measuring quantities).


Types of digital measuring

What are the types of digital measuring?

Laser measure

A laser measure is a high-precision device for determining distances. There is a wide range of laser measuring devices. From models with simple length measurement to advanced models with functions like stake-out- measurement or camera viewfinder. There are even models that connect wirelessly to your smartphone or tablet, allowing you to transfer the measurements to a photo or floorplan. So, with our Laser measure you can work simply, precisely and fast. Rangefinders usually have a red laser, as a standard in the industry. Some of our laser measure have a green laser, which is more visible to the human eye than compared to the red laser.

Angle measure (protractor)

A protractor is a measuring device that is used to calculate or draw angles in terms of degrees. Angle measuring is a method to determine the position of workpiece or components in relation to each other.

Inclinometer

An inclinometer is an instrument used for measuring angles of slope, elevation, or depression of an object with respect to gravity's direction. Inclination measuring is used to measure and indicate deviations from the vertical or horizontal.

Measuring wheel

The lightweight measuring wheel measures purely mechanically distances while walking and is an effective method of simple distance quantification. Especially the measurement of curves is facilitated. Even though the measuring wheel is a mechanical and not a digital instrument for distance measurement, it is still a convenient tool to use, e.g. for road traffic matters.

History of the unit of length

Traditional technologies vs. new technologies

Direct measuring

  • During direct measuring, the measured value is acquired directly, for example, by placing a measuring ruler onto the measured object.

    • Methods of direct measuring:
    • Measuring ruler
    • Tape measure
    • Digital inclinometer
    • Calliper

Problems

  • Time intensive
  • Labor intensive
  • Accuracy (re)check
  • Long distances

Today´s solution

  • Digital measuring combined with traditional methods. Using traditional with new methods is time saving, cost saving and has a higher precision.
  • Digital measuring: Method of measurement where analogue signals are converted into digital signals before they are processed further by the measuring instrument. Alternatively, where a digital signal, such as an impulse, is directly processed. A digital instrument or display is used to show the results.

    • Methods of digital measuring:
    • Laser measure
    • Digital angle measure (protractor)
    • Digital inclinometer
    • Measuring wheel

How does it work?

Laser measure

A laser beam is sent out during measuring. The laser light is reflected by the measured item. The reflection is acquired by a sensor in the rangefinder. The distance is calculated electronically from the difference in time between the sending and receiving of the laser signal. The measurement result is converted and displayed in meters, centimeters and millimeters or in inches and feet via the time factor between sending and receiving.

Inclinometer

The digital level is equipped with an internal sensor which aligns itself with gravity. If the position of the digital level changes in relation to the direction of gravity, the sensor will measure the magnitude of the deviation and indicate it as digital value on display.The results can be displayed in angular degrees (°), in percent (%) and millimeter per meter (mm/m).

Electronic angle measure

The electronic angle measure is equipped with a rotation sensor by forwarding the signals internally. The rotation sensor detects the angle between the two legs of the angle finder several times per second and controls the resulting value by comparison with the full circle (360°). The current angle is shown digitally on the display.

Measuring wheel

The wheel circumference of each measuring wheel is defined, and there are different wheel sizes. In the wheel there is a disc that measures each revolution and expresses this in centimeters and meters on a display i.e. a mechanical counter.

Where is measuring needed?

Applications for measuring

Laser measure: Indirect measurement function for convenient determination of heights and distances - even in hard-to-reach places.

Laser measure: Determine the exact need for materials such as paints, tiles, cables, flooring, wallpaper and scaffolding.

Laser measure: Calculate volumes easily, e.g. to determine the heat requirement for heating systems

Inclinometer: Determine the right slope for e.g. terrace construction so that the rainwater drains off

Inclinometer & laser measure: Accurately align kitchen appliances, ovens, heaters, and windows and stairs.

Laser measure: Plan partition walls, for example, in drywall with minimal effort.

Laser measure: Calculate the areas of walls, floors and ceilings as well as volumes at the push of a button.

Angle measure: Determine angles quickly and accurately and calculate miter angles with just one click.

Measuring wheel: Measurement for road construction in order to set the correct markings, e.g. the distance from delineators

Measuring wheel or laser measure: Design parking spaces

Benefits of the various tool types

The main advantages are:

  • Excellent accuracy, even over long distances
  • Extreme focusing of the laser beam makes the target point on the measured item very small
  • Visibility of the target point
  • Extremely fast measuring time
  • There is no higher measurement accuracy than measuring with laser light
  • Smart data transfer to smartphone or tablet through connectivity

The main advantages are:

  • Result is displayed digitally and with high precision
  • Digital levels are more accurate
  • Fast measuring time

The main advantages are:

  • Accuracy
  • Long-term stable
  • Results displayed directly
  • The measured value can be stored (memorized). This makes it possible to measure comfortably in places which cannot be viewed directly or only with great difficulty.
  • Miter finder help function: Automatic calculation of single and double miter and bevel angles without further aids.

The main advantages are:

  • High stability and durability
  • Easy to read and impact resistant
  • Easy reset
  • Comfortable usage
  • The original distance between two points is measured

What to consider while measuring /additional hints

Underground

  • The space between the measuring instrument and the measured item must be unobstructed by any obstacles. For example, measuring wheel should not have any irregularities.
  • It must be smooth-running, and it should not have any obstacles, e.g., dirt, which would prevent it from measuring a certain distance.

Underground

Humidity & temperature

  • In extreme environmental conditions such as strong sunlight, fog or heavy rain, the possible measuring distance for a laser measure is reduced, because the conditions can absorb or partially reflect the measuring beam and produce faulty measurements.

Humidity & temperature

Reflecting surfaces

  • For the best utilization of the performance of a Laser measure, well reflecting surfaces are necessary.
  • Water surfaces or glass surfaces are not suitable, as they absorb the measuring beam and thus lead to incorrect results.

Reflecting surfaces

Accuracy

  • After a drop, all measuring instruments should be calibrated and readjusted.

Accuracy

FAQ

  • The measuring accuracy is ± 1.5 mm for the majority of our laser measures. It’s realized under typical, meaning favorable conditions (reflective target, no adverse light conditions, normal temperature & humidity).
  • Under unfavorable conditions the measuring accuracy is ± 3.0 mm for the majority of our laser measures (reflective target, strong backlighting, normal temperature & humidity).
  • Additionally, a deviation per meter needs to be added: (± 0.05mm/m in favorable conditions; ± 0.15mm/m in unfavorable conditions).
  • E.g. Measuring accuracy at 10 m in favorable conditions: ± 1.5 mm + (10 m * ± 0.05 mm/m) = ± 2 m. Measuring accuracy at 10 m in unfavorable conditions: ± 3.0 mm + (10 m * ± 0.15 mm/m) = ± 4.5 mm. Please note: This only refers to the majority of our measuring tools. Keep in mind that accuracy can differ between tools.
  • The typical accuracy is a good indicator for the engineering and manufacturing quality of a laser measure. You can see that many lower priced products have a typical accuracy of ± 3mm or even more.
  • Most Bosch Professional laser measures (GLM 40, GLM 50 C, GLM 50-22, GLM 50-25 G, GLM 50-27 C & CG, GLM 100-25 C & 150-27 C and GLM 500) are certified according to the ISO Norm 16331-1, which guarantees their working range and accuracy.
  • On the packaging and in our communication material, the ISO logo will appear, whereas in the user manual, specifications will be provided for favorable & unfavorable measuring conditions. This helps the user to better understand the measuring performance in different environments.
  • Both statements help the user to differentiate the laser measure from other manufacturers.
  • The default reference level is the rear edge of the tool (e.g. when placing it against walls).
  • For some tools, it can also change to the front edge or to the center of the tripod thread (if they have one).
  • If a tool has a measuring pin, the reference level can also be changed to the tip of the measuring pin. Folding the measuring pin in and out by 180° is automatically detected and the corresponding reference level suggested.