Indicator for when an oil field has been exhausted

[DragonMudd]

Some of us like to use production modules in our pumpjacks, and then later switch to speed modules when the oil field's yield has been reduced to the bottom. The problem is that if an oil field started with >10/s yield, there's no easy way to tell if it's been exhausted yet, since the bottom will be greater than 2/s. Currently, the only way to tell is to sit there for 300 cycles to make sure it doesn't decrease further, and nobody wants to do that. Could there be some indicator somehow that is added to tell when an oil field has been drained?

[steinio]

Well technically it's not exhausted, it's just slow.

You can connect a speaker and play a sound if yield dróps under a certain value, but no value smaller then 1.

Example

factorio oilpump.png (2.41 MiB) Viewed 1437 times

[DragonMudd]

Yes, when I said 'exhausted' I meant 'at it's minimum rate'.

The issue is the minimum rate is different for each well (bottom rate is MAX(2/s, 20% of original well rate), so if the well was originally more than 10/s it will be some different value), and setting up individual alarms for every well when they are first tapped is an obnoxious workaround, when it could easily be improved by, say, changing the color of the rate to red when it's hit the bottom limit.