This is a continuation of the same case that the Hospital client faced with their operating room issues. Yet another problem that popped up was that the VAV controller needed a DP sensor, but there was only an input for dry contacts.
The manufacturer said the task was impossible, but that is not the Enica way. We converted the 10-bit dry contact input into a 0.5 V input and installed the DP sensor successfully. The airflow readings were accurate and the hospital was forever grateful.
We saved the hospital untold costs because they did not have to replace the VAV controllers.