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, in contrast, can only just display a ?1?, a number ?2? or higher isn’t possible. With a 3 1/2-digit digital indicator, the indicatable range 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. However, no negative values could be indicated, because the minus sign can’t be displayed in the initial 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 which have a separate space for the display of the sign. Displays with this particular 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?1999
-9999?9999
Max. number of positions after decimal point
2
3
3
Note
More information about digital indicators from WIKA are available on our website.
See also Noted of the display of a digital indicator ? there you can find general information on the most important characteristic top features of the display of an electronic indicator.