Hydac HDA 7400 pressure transmitter

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The HDA 7400 pressure transmitter has a flush membrane and a stainless steel measurement cell with a thin film strain gauge for relative pressure measurement in the high pressure range.

The pressure connection is achieved with a fully sealed stainless steel front membrane filled internally with a pressure transfer fluid. The process pressure is transmitted hydrostatically to the measurement cell via the pressure transfer fluid. The output signals 4–20 mA or 0–10 V permit connection to all Hydac measuring and control devices, as well as connection to standard evaluation systems such as PLCs.

It was designed specifically for applications in which a standard pressure connection 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.

The HDA 7400 features an accuracy of ≤0.5% FS, a highly robust sensor cell and small temperature error.