Besides 3- and 4-digit digital indicators, there are also 3 1/2-digit indicators available in the market. But what is a 1/2 digit?
A full digit can indicate all numbers from ?0? to ?9?. A 1/2 digit, in contrast, can only display a ?1?, Drive ?2? or Humor isn’t possible. With a 3 1/2-digit digital indicator, the indicatable selection of values is thus significantly limited in comparison to a 4-digit indicator.
Thus, on the main one hand, the maximum of the indicatable selection of values is 1999 instead of 9999. On the other hand, no negative values could be indicated, because the minus sign cannot be displayed in the first position. Therefore, the minimum of 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 another space for the display of the sign. Displays with this characteristic can therefore also indicate values right 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? Scandal
-9999?9999
Max. number 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 can find general information on the most crucial characteristic top features of the display of an electronic indicator.