These are brand new ABB HART differential pressure transmitters, capable of measuring from -64 inH2o to +64 inH2O.  The output signal is 4-20 mA, 24 VDC.  The sensor diaphragm is 316L SS and the fill is inert oil (Galden).  Local digital display.  HART setup and calibration.  Universal stainless steel pipe and panel mount brackets are included. Suitable for indoor or outdoor industrial automation applications,