SERIES-629C  Wet/Wet Differential Pressure Transmitter, Dual Sensors, 0.5% Accuracy, NEMA 4X

The Dwyer Series 629C Wet/Wet Differential Pressure Transmitter is a versatile and highly accurate device designed to monitor the differential pressure of compatible liquids and gases. It uses dual pressure sensors to provide precise measurements in a rugged, NEMA 4X (IP66) enclosure, making it suitable for demanding industrial and HVAC applications such as monitoring filters, pumps, chillers, and heat exchangers.

SERIES-629C  Wet/Wet Differential Pressure Transmitter, Dual Sensors, 0.5% Accuracy, NEMA 4X

The Series 629C Wet/Wet 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, with the optional factory installed remote sensors, are connected to the unit, either via armored or shielded cable and available in 10 and 20′ lengths. Installation is much simpler, reducing labor and material cost versus traditional copper piping installations and no need for valve manifolds. The 629C family has a robust NEMA 4X (IP66) construction, which is also available with an integral LCD for localized data monitoring and with a remote sensor option. NIST CALIBRATION available in Product Configurator.

Powered by either DC or AC – take advantage of most readily available power source reducing installation costs

  • Optional LCD does not need a separate power supply – lowers installed cost
  • Selectable voltage range – provides flexible choice for changing design or inputs for process/HVAC controllers being used to monitor and control
  • Push button zero (versus trim pot) – more simple zeroing provides easy install and calibration reducing installation

Product Applications

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

Technical Sheets

PDF Manual

Catalog Page

Specifications

Accuracy
± 0.5 %
Accuracy Detail
± 0.5% FS (includes linearity, hysteresis and repeatability)
Applications
Filter Monitoring, Fluid Measurement and Control, Oil, Pump Control, Refrigeration, Refrigeration Equipment
Compensated Temperature, Max
79 °C
Compensated Temperature, Min
-18 °C
Compliance
CE
Display Type
N/A
Electrical Connection
1/2 in NPT female Conduit with Screw Terminal block
Enclosure Ratings
IP66, NEMA Type 4X
Long Term Stability
± 1% FS/year
Media Compatibility
Air, Argon, Carbon dioxide, Helium, Hydrogen, Nitrogen, Oxygen, Steam
Mounting Note
Not Position Sensitive
Operating Temperature, Max
93 °C
Operating Temperature, Min
-18 °C
Power Consumption
max 28 mA
Measurement Pressure Type
Differential
Process Connection Size
1/4 in
Response Time
400 ms
Span Adjustment
Push Button
Thermal Effects
0.072%/°C
Thermal Effects Note
Avg 0.04%/°F (0.072%/°C) (includes zero and span)
Zero Setting Adjustable Range
Push buttons inside conduit enclosure

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