Add support for pressure transducers (P series)

[alexrudd2]

Hello,

I have a BB9 with two MFCs as well as some differential pressure transducers (P Series).
I managed to connect the MFCs without any issues with python, however, I realized that there is no model for the pressure transducers.
Is there a way to connect and read the pressure transducers via python?

Best,
Francisco

Requested by @Fratorhe at numat#146 (comment)

[alexrudd2]

Hello @Fratorhe.

You are correct that this code does not handle P series instruments. I do not have any to test and so have no current plans to add them. However, pull requests are welcome.