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  • 0.5% Accuracy
  • NEMA 4X (IP66) Enclosure
  • Dual pressure sensors
  • Removable terminal block
  • LCD indicator option
  • 4 to 20 mA or voltage output signal


The Dwyer 629 Series Differential Pressure Transmitter monitors differential pressure of air and compatible gases and liquids with 0.5% accuracy. The design employs dual pressure sensors converting pressure changes into a standard 4 to 20 mA output signal or field selectable voltage. Small internal volume and minimal moving parts result in exceptional response and reliability. The terminal block, as well as a zero adjustment button, are easily accessed under the top cover. The Series 629C Differential Pressure Transmitter is designed to meet NEMA 4X (IP66) construction.

Applications for the 629C include:

  • Flow elements
  • Heat exchangers
  • Filters
  • Coils
  • Chiller
  • Pumps