Besides 3- and 4-digit digital indicators, additionally, there are 3 1/2-digit indicators available for sale. But what is a 1/2 digit?
A full digit can indicate all numbers from ?0? to ?9?. A 1/2 digit, on the other hand, can only just display a ?1?, lots ?2? or higher isn’t possible. With a 3 1/2-digit digital indicator, the indicatable selection of values is thus significantly limited in comparison with a 4-digit indicator.
Thus, on the main one hand, the utmost of the indicatable selection of values is only 1999 rather than 9999. On the other hand, no negative values could be indicated, because the minus sign cannot be displayed in the initial position. Therefore, the the least the indicatable selection of values is 0 instead of -1999.
An exception to the limitation of the indicatable negative value range is represented by indicators which have a separate space for the display of the sign. Stable with this 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?9999
Max. amount 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 a digital indicator ? there you will see general information on the most important characteristic top features of the display of a digital indicator.