Pressure Transmitter HDA 4400 with a flush membrane was designed specifically for applications in which a standard pressure port could become blocked, clogged or frozen by the particular medium used. Further applications include processes where the medium changes regularly and any residues could cause mixing or contamination of the media. Like the standard model, the HDA 4400 with flush membrane has a pressure measurement cell with a thin-film strain gauge on a Stainless Steel membrane for relative pressure measurement in the high pressure range.