Dwyer Sanitary Pressure Transmitter, Series 681
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Series 681 Sanitary Pressure Transmitter

Brand: Dwyer Instruments, LLC
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The SERIES 681 Sanitary Pressure Transmitter is designed to meet 3A standards for applications in food, dairy, beverage and pharmaceutical processing, liquid level control, and sanitary pipelines.

The unit is fully sealed to withstand high pressure washdown in Clean-in-Place (CIP) and Sterilize-in-Place (SIP) installations.

The Series 681 is designed with a unique, no liquid fill diaphragm and a sanitary clamp pressure fitting for easy installation with negligible clamping effect. A conduit fitting, shielded cable with vent tube and sealed screws for zero and span adjustment combine to make the Series 681 completely watertight.
Features
  • Fully sealed to withstand Clean-in-Place and Sterilize-in-Place installations supports regulatory conditions for sanitary processes
  • Sanitary clamp fitting makes for easy installation

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Specifications

Brand

Accuracy

  • ± 0.20 % of Full Scale (Includes Non-Linearity, Hysteresis & Non-Repeatability)

Approvals & Certifications

  • CE

Cable Length

  • 15 feet (4.5 metres)

Compensated Temperature

  • -7° to 80° C (20° to 180° F)

Electrical Connectors

  • 1/2” Conduit

Fill Material

  • No Liquid Fill Diaphragm

Humidity

  • 10 to 90 % Relative Humidity, Non-Condensing

Loop Resistance

  • 800 ohms

Media

  • Compatible Gases
  • Compatible Liquids

Output

  • 4-20 mA, 2-Wire

Overpressure & Static Pressure Limits

  • From psi: 50 (kPa: 345, bar: 3.4) to psi: 180 (kPa: 1,241, bar: 12.4)

Power Requirement

  • 9-30 Vdc

Pressure Range

  • bar: 0 to 4.1
  • kPa: 0 to 413.6
  • psi: 0 to 60

Pressure Type

  • Gauge

Response Time

  • ≤ 10 milliseconds

Span & Zero Adjustments

  • ± 0.5 mA, Non-Interactive

Span & Zero Effect

  • Zero & Span Shift: ± 0.15 % of Full Scale for Ranges up to 30 psi
  • Zero & Span Shift: ± 0.25 % of Full Scale for Ranges > 30 psi

Temperature Effect

  • Zero & Span: ± 2.0 % of Full Scale/38° C (100° F)

Temperature Range

  • -40° to 125° C (-40° to 260° F)

Tri-Clamp Connection

  • 1-1/2” Sanitary Clamp
  • 2” Sanitary Clamp

Wetted Materials

  • 316L Stainless Steel

  • Sanitary process applications
  • Food and beverage processing
  • Water processing
  • Dairy processing
  • Pharmaceutical processing

Documentation

Approvals

Catalogs

Manuals

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