From the scant product pages these appear to be resistor-loaded piezo sensors, which need a high
impedance in the sensing circuitry - the specifications are given in V/N, suggesting this, as well as
the exictation voltage and current being listed.
You need a voltage amplifier with high input impedance, not that charge-mode amplifier, as the
data listed doesn't give charge sensitivity rating.
In fact a standard load-cell amplifier is probably intended as the readout device, though note
the high voltages quoted aren't compatible with 5V load-cell amps, but assume a +/-15V supply
(ie industry standard opamp circuitry). At 5V I'd suspect the dynamic range is limited, but the
sensitivity should be unchanged.
BTW I was worried by the SI values in this datasheet, as "500mV/lb +/-15%" is translated to
"112410 mV/kN" showing 3 spurious digits of precision - yes the numbers are at least right,
but it shows a worrying lack of basic numeracy for engineering/science to not understand
spurious precision. And why not say 112V/kN or 112mV/N?
I did do a sanity check on the other SI conversions and they seem to have got the values right