advice on using loadcells

I’ve been trying to figure out if the loadcells from cheap kitchen scales can be used on the Arduino. I thought they would just be simple strain gauges with 3 wires - excitation, common, and signal. When I measure the voltage, I get:

1.2V between white and red.
about .56V between white and black

But none of the voltages change when I put weight on it. I’m using just the 2 cell batteries right now. Any advice?

The voltage changes are measured in microvolts, you need to look at the output of the
amplifier to see anything interesting.