I have often wondered if there was a sort of 'dip stick' out there that would allow one to check the actual amount of toner left inside of a toner cartridge. I change out toner cartridges, and I do it when the printer's status LCD states, "Toner Low". I shake the toner a few times, put it back in, and wait for the 2nd instance of the "Toner Low" to appear.
I just wonder if I am possibly getting false positives and replacing toner cartridges that have plenty of toner in them, but for what ever reason the printer thinks it is low.
How about weighing a full NEW toner cartridge to see what it weighs and compare that to an 'empty' or 'low' one?
Thanks in advance