I have attached a picture of a contactor from the unit and another angle of the sensor. The busbar is going through the sensor. I have no question that this is a current sensor, I was just hoping to ID it so that I could reuse it.
You should be able to find out fairly easily all those linked are linear, so supply power and measure the output voltage with no current to get the offset, then pass a variety of known currents through to get the slope. All the known currents should plot on a straight line if it's anything like the rest of the range.
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