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Series 677B Differential Pressure Transmitter

Brand: Dwyer Instruments, LLC
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Does not ship to United States
Series 677B Differential Pressure Transmitters are designed to measure pressures as low as 0.1 in w.c. with ±0.4% accuracy.

Use Series 677B for building energy management systems, environmental pollution control, oven pressurization, lab and fume hood control, HVAC and VAV applications.

The transmitter features 15 psid overpressure, reverse polarity protection and EMI/RFI protection. Internal regulation permits use with unregulated DC power supplies.

The NEMA 4 housing allows for versatile mounting locations and integral mounting tabs simplify installation.
Features
  • NEMA 4 housing enables a range of use outdoor or indoor where water is present
  • High accuracy at low pressure ranges provides exceptional measurement for insuring tight-control and minimizing costly out of specification conditions
  • Use with unregulated DC power permits easy access to electrical supply reducing costly power conditioning and wiring
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Series 677B Differential Pressure Transmitters are designed to measure pressures as low as 0.1 in w.c. with ±0.4% accuracy.

Use Series 677B for building energy management systems, environmental pollution control, oven pressurization, lab and fume hood control, HVAC and VAV applications.

The transmitter features 15 psid overpressure, reverse polarity protection and EMI/RFI protection. Internal regulation permits use with unregulated DC power supplies.

The NEMA 4 housing allows for versatile mounting locations and integral mounting tabs simplify installation.
Features
  • NEMA 4 housing enables a range of use outdoor or indoor where water is present
  • High accuracy at low pressure ranges provides exceptional measurement for insuring tight-control and minimizing costly out of specification conditions
  • Use with unregulated DC power permits easy access to electrical supply reducing costly power conditioning and wiring
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Specifications

Brand

Accuracy

  • ± 0.4 % of Full Scale at Room Temperature

Approvals & Certifications

  • CE

Compensated Temperature

  • -18° to 85° C (0° to 185° F)

Enclosure, Body Material

  • 302 Stainless Steel

Environmental Protection

  • IP65
  • NEMA 4

Loop Resistance

  • 0 to 800 ohms

Media

  • Air
  • Non-Conductive & Non-Corrosive Gases

NACE & NIST

  • NIST Traceable Calibration Certificate

Operating Temperature

  • -18° to 85° C (0° to 185° F)

Output

  • 4-20 mA DC, 2-Wire

Power Requirement

  • 16-32 Vdc

Pressure Range

  • Inches WC: 0 to 25

Pressure Type

  • Differential

Process Connection Material

  • 3/16” I.D. Rubber
  • Brass

Response Time

  • Approximately 10 milliseconds

Span & Zero Adjustments

  • Internally Accessible Potentiometers
  • Non-Interactive

Stability

  • ± 1 % of Full Scale Per Year

Storage Temperature

  • -54° to 105° C (-65° to 220° F)

Temperature Effect

  • < 0.028 % of Full Scale/°F at -18° to 85° C (0° to 185° F)

Tube Connection

  • 3/16” O.D. Barbed Brass Pressure Fitting

Wetted Materials

  • Brass
  • Glass
  • Nickel
  • Silicone Rubber
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Typical Applications

  • Building energy management
  • Environmental pollution control
  • Lab and fume hood control
  • Variable air volume
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