Dwyer Wet/Wet Differential Pressure Transmitter, Series 629
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Series 629 Wet/Wet Differential Pressure Trans

Brand: Dwyer Instruments, LLC
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The SERIES 629 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 4-20 mA output signal for two wire circuits. Small internal volume and minimum moving parts result in exceptional response and reliability.

Terminal block, zero and span adjustments are easily accessed under the top cover. The Series 629 Differential Pressure Transmitter is designed to meet NEMA 4X (IP66) construction.
Features
  • Versatile, high-accuracy device for liquid or gas supports designs requiring more precise measurements in support of application
  • Minimum components provide excellent response and reliability
  • Span and zero controls reduce installation and service time
  • Terminal block reduces wiring difficulties saving installation time
  • Optional LED indicator provides local status to identify operational conditions
  • Optional 3-way valve manifold supports higher line pressures or simplifying removal of transmitter without interrupting process

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Specifications

Brand

Accuracy

  • ± 0.5 % of Full Scale (Includes Linearity, Hysteresis, & Repeatability)

Applications

  • Chiller
  • Coils
  • Filters
  • Flow Elements
  • Heat Exchangers
  • Infusion Pumps

Approvals & Certifications

  • CE

Compensated Temperature

  • -18° to 79° C (0° to 175° F)

Display

  • 4-1/2-Digit LED Display

Electrical Connectors

  • 1/2” NPT Female Conduit
  • Terminal Block

Environmental Protection

  • IP66
  • NEMA 4X

Loop Resistance

  • Current Output: 0 to 1300 ohms, Max.
  • Voltage Outputs: 2000 ohms Min.

Media

  • Compatible Gases
  • Liquids & Gases

NACE & NIST

  • NIST

NPT Connection

  • 1/4” NPT Female

Output

  • 4-20 mA

Power Requirement

  • 13-30 Vdc (2-Wire)

Pressure Range

  • bar: 0 to 6.895
  • kPa: 0 to 689.5
  • psid: 0 to 100

Response Time

  • 50 milliseconds

Sensor Orientation

  • Not Position Sensitive

Temperature Effect

  • 0.02 %/°F (0.036 %/°C) Includes Zero & Span

Temperature Range

  • -18° to 93° C (0° to 200° F)

Wetted Materials

  • 3-Way Valve: Brass 360
  • 3-Way Valve: Copper
  • 3-Way Valve: PTFE
  • 3-Way Valve: Buna-N
  • 3-Way Valve: Reinforced Acetal Copolymer
  • 3-Way Valve: Silicone Grease
  • Without Valve: 316, 316L Stainless Steel

  • Chiller
  • Coils
  • Filters
  • Flow Elements
  • Heat Exchangers
  • Infusion Pumps

Documentation

Approvals

Catalogs

Manuals

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