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 isn’t possible. With a 3 1/2-digit digital indicator, the indicatable range of values is thus significantly limited in comparison to a 4-digit indicator.
Thus, on the one hand, the utmost of the indicatable selection of values is 1999 rather than 9999. However, no negative values can be indicated, because the minus sign cannot be displayed in the first position. Therefore, the minimum of 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 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? เกจวัดแรงดันปั๊มลมpuma
-1999?1999
-9999?9999
Max. number 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 a digital indicator ? there you will discover general information on the main characteristic top features of the display of a digital indicator.