Besides 3- and 4-digit digital indicators, additionally, there are 3 1/2-digit indicators available in the market. But exactly what is a 1/2 digit?
A complete digit can indicate all numbers from ?0? to ?9?. A 1/2 digit, in contrast, can only display a ?1?, a number ?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 one hand, the utmost of the indicatable selection of values is 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 the least the indicatable range of values is 0 rather than -1999.
An exception to the limitation of the indicatable negative value range is represented by indicators which have another space for the display of the sign. Displays 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? เกจวัดแรงดันไฮดรอลิค with separate sign
-999?999
-1999?1999
-9999?9999
Max. amount of positions after decimal point
2
3
3
Note
More information about digital indicators from WIKA can be found on our website.
See also our article
Characteristics of the display of an electronic indicator ? there you can find general information on the main characteristic top features of the display of a digital indicator.