Measuring range

In the world of measuring technology, the measuring range has a significant influence on the accuracy and reliability of measurements. Whether in industry, scientific laboratories or in everyday life – it is essential to correctly determine the measuring range to ensure precise results. Find out more about what a measuring range is, how to select a suitable measuring range, and why it is so important for accuracy.

The measuring range is the defined range of a measured variable within which a measuring instrument provides reliable and accurate measured values. It refers to the range in which measurement deviations and error limits are acceptable. While the measuring range ensures the accuracy and reliability of the measurement, the indicator range refers to the scale indication or display of a measuring instrument that visualizes the measured values. It is important to note that the measuring range and the indicator range are not always the same. In some cases, the display range may be wider, but it does not guarantee the accuracy of the measured values outside the defined measuring range.

Basic measuring range examples:

• A carpenter’s rule with a length of 2 meters has a measuring range of 0 to 2 meters.
  
• A voltmeter has a measuring range of -10 to +10 volts.

Choosing a suitable measuring range is crucial to ensure the accuracy of measurements. Always start with a measuring range that safely includes the expected value. Measuring ranges that are too large can compromise accuracy, since smaller measurement deviations are more difficult to detect. On the other hand, a measuring range that is too small can overload or even damage the measuring instrument. As such, accuracy is not only determined by the measuring instrument, but also by the correct selection of the measuring range.

The measuring range of a sensor or measuring instrument is divided into different elements: lower range value, mid-range value and upper range value. The lower range value indicates the point from which the instrument provides reliable measurements. The mid-range value is often an average, while the upper range value indicates the upper limit up to which the instrument provides precise measured values.

The zero point, i.e. the value at which the measured value reaches zero, is often used as a reference point for measurement and for calibrating the measuring instrument. It is used to better understand and interpret measurement deviations and error limits. The zero point can be at the start, in the middle, at the end or even outside the measuring range. Error limits define the acceptable deviation of measured values and are essential for the accuracy of the measurements.