Set alarm without DDR using amount remaining?

I want to send myself an email alarm when my DOS module counts down to ~100ml left in my container. I noticed the module will have a countdown, and I'm guessing this is just based on how much it doses a day compared to what I set as the remaining volume.

Can I do this?

If not, I'll just set a calendar reminder based on when it should theoretically be empty I guess.

It does not have that feature. That feature doesn't even exist for ddr users (it's just a graphical depiction of remaining level not an alarm based on remaining level). The DDR alarms are based on the optical sensor.

You might be an engineer if...You have no life and can prove it mathematically.