[MechSkep]

We certainly have a microphone. There is such a richness in the sounds a colony produces. Our minimal sensing package also contains temperature and humidity sensing. We're shooting for collecting a labeled data set this coming season to see what we can pull out of the information we collect.

[mlrtime]

I know nothing about beekeeping but having read the article it seems that weight would be an important measure.

[pbhjpbhj]

Presumably the weight change you're looking to monitor mainly is volume of honey produced? Perhaps there's an analogue for that - maybe reflectivity of the frames or opacity to IR or some such?

Perhaps even just look at the heat retention against time accounting for external temperature (eg cooling rate at night vs. the ambient cooling curve) as that will give you the thermal capacity which should increase with increased honey volume. That should give you a first-order approximation at least (humidity would factor in to rule out waterlogging, not sure what the other main causes of hive weight change are beyond bee numbers which you'll also presumably have from the audio-volume and/or the ingress-egress readings).

[cc439]

Throw some load cells on the base. Hell, you could make a frame that acts like a 1 load cell bench scale, it's not like it'll weigh too much.

[MechSkep]

Weight is another good one, it drives our complexity and cost up but is hugely important. Most extant hive monitoring tools record weight. NASA uses some of these measures to track mass flow rates of nectar.