Besides 3- and 4-digit digital indicators, additionally, there are 3 1/2-digit indicators available for sale. But exactly what is a 1/2 digit?
A complete digit can indicate all numbers from ?0? to ?9?. A 1/2 digit, in contrast, can only display a ?1?, a number ?2? or higher is not possible. With a 3 1/2-digit digital indicator, the indicatable range of values is thus significantly limited in comparison to a 4-digit indicator.
Thus, on the one hand, the maximum of the indicatable selection of values is only 1999 instead of 9999. However, no negative values can be indicated, because the minus sign cannot be displayed in the first position. Therefore, the the least the indicatable selection of values is 0 rather than -1999.
An exception to the limitation of the indicatable negative value range is represented by indicators that have a separate space for the display of the sign. Displays with this particular characteristic can therefore also indicate values down to -1999.
Number of digits
3-digit indicator
3 1/2-digit indicator
4-digit indicator
Representation
Max. scale range, standard
-199?999
0?1999
-1999?9999
Max. scale range with separate sign
-999?999
-1999?1999
-9999? Shrewd of positions after decimal point
2
3
3
Note
More info about digital indicators from WIKA can be found on our website.
See also our article
Characteristics of the display of an electronic indicator ? there you will discover general information on the main characteristic top features of the display of a digital indicator.