growerdick:
They have an app note describing using a tube from water, which is what I need it for. The tube will be full of air and the device above the water level.Do you have a link for that? Pressure will not be accurately transmitted up to a sensor mounted higher then the full water level if there is air in the sensing lead between the liquid level and the sensor, it's physically impossible, the air will compress some but not 'transmit' the true pressure value. But maybe the app note is showing something different then what you think it is? Not trying to be difficult, but I have decades of experience in the reading of vessel pressure and vessel liquid level measurements based on liquid head pressure and the various methods needed to make such measurements.
Is there any reason why using 5v will cause problems. I am not sure of the reason behind the 8v.
Well the datasheet I read stated a typical sensor operating voltage of 10vdc with a maximum of 16vdc, but it failed to state a minimum operating voltage for the sensor, so I really can't tell you it would work as designed with 5vdc, but I would suspect it won't as I would think they would state that as 5vdc is a very popular operating voltage.
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LeftyThanks.