hi HD,
Agreed, I would class them as half bridge load cells rather than quarter bridge strain gauge elements.
IMHO you will be hard pressed to get +/-0.5lb [0.227Kg] , thats around +/-0.1%
As you have noted weather conditions, including the wind and temperature, will 'appear' to change the hives 'productive' weight.
The bridge excitation is 10Vdc.
I am assuming the spec' table you posted applies to a single half bridge cell.???
An Instrumentation amplifier would be my choice, say single power supply version.
Does the hive have a 'local' power source, ie: mains etc.?
E