Pressure transducer being read using Labview
There needs to be something to keep the common mode voltage within the +/-10V range of the 9215 inputs. The BNC version appears to have a 100K resistor to COM but the spring terminal version does not. 

You can connect the negative of your external power supply directly to the COM input terminal, or put a 1K resistor in series. 

I would expect both the sensor output pins to sit at about half the supply voltage that is energizing the sensor, so if you're using a 12V supply at about 6V, give or take a few percent. That's well within the common mode range if the negative of the supply is connected to the common of the ADC module.