Despite the fact that each day there a more specific printer drivers for Linux, in many cases these don't go together with all the control programs for each of these printers, thus it isn't possible to find out how much ink they have left. To find it out you can always use QInk.
An ideal ink level indicator
The way QInk works is rather simple, because once it is installed it will automatically detect the printers that are installed on the computer. The user will only have to select the printer that he wants to find out the ink level for.
The ink level clearly visible.
Once the printer that is going to be controlled is selected, QInk will show the ink level of each of the cartridges that it has. The data will be very clear because it will show both a bar and a percentage indicator.
Download QInk to know at all times the ink level of the cartridges of your printer.