The Honeywell NBP sensors are Wheatstone bridges without any amplification or signal conditioning of any kind. Therefore, you need to drive the bridge and amplify/condition the output yourself. A bridge output is the difference between two sides of the bridge, so you will need an instrumentation amplifier (in-amp) or discrete op-amps configured as an in-amp to do this. Simply measuring the output of one side of the bridge to ground will not give you the correct readings.
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