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PROCON Pressure recorders consist of a measuring element – Helical Bourdon Tube, Movement and a Circular Chart Rotated by Mechanical or Electrical Clock. The Pressure system consist of bourdon tube connected by a fine bore capillary tube to the process connection. As the pressure increases, bourdon expands. The movement of bourdon end is magnified through linkage system and moves the pen on the graduated chart showing the pressure. The chart rotates with the help of clock thereby recording the pressure on the chart at a specified time.