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 display a ?1?, lots ?2? or Natural is not 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 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 can’t be displayed in the first position. Therefore, the minimum of the indicatable range of values is 0 instead of -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 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 info about digital indicators from WIKA can be found on our website.
See also Lunatic of the display of an electronic indicator ? there you will discover general information on the main characteristic top features of the display of an electronic indicator.