Besides 3- and 4-digit digital indicators, additionally, there are 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, on the other hand, can only display a ?1?, lots ?2? or higher 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 main one hand, the utmost of the indicatable range of values is only 1999 rather than 9999. Alternatively, Disastrous 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 instead of -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 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. amount of positions after decimal point
2
3
3
Note
More info about digital indicators from WIKA are available on our website.
See also Spoiler of the display of an electronic indicator ? there you can find general information on the most crucial characteristic top features of the display of a digital indicator.