Dwyer Differential Pressure Transmitter, Series 668
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Series 668 Differential Pressure Transmitter

Brand: Dwyer Instruments, LLC
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Our low cost SERIES 668 Differential Pressure Transmitter is capable of measuring low pressures with a ±1% accuracy - ideally suited for proper building pressurization and air flow control.

Transmitters can withstand up to 10 psig overpressure with no damage to the unit.

Variable capacitance sensor design provides excellent sensitivity and long-term stability.

Compact, lightweight design makes installation simple and easy. Units also feature reverse-polarity protection.
Features
  • Good accuracy at low pressure ranges provides exceptional value for insuring control and minimizing costly out of specification conditions
  • High overpressure rating eliminates possible damage to unit reducing unnecessary service time

Displaying prices & availability for Ohio, United States in CAD. Change location.

Models matching criteria: 53
668C-4-NISTCAL-PT1
  • Pressure Range - Inches WC: 0 to 2.5
  • Cover - Conduit Cover
  • Certificates - NIST Traceable Calibration Certificate
100+ In Stock
$1,189.00 CAD
$10.00 Shipping
668-10-NISTCAL-PT1
  • Pressure Range - Inches WC: 0 to ± 0.1
  • Cover - No Cover
  • Certificates - NIST Traceable Calibration Certificate
100+ In Stock
$2,360.00 CAD
$10.00 Shipping
668C-8
  • Pressure Range - Inches WC: 0 to 50
  • Cover - Conduit Cover
  • Certificates - No Additional Certifications
100+ In Stock
$1,576.00 CAD
$10.00 Shipping
668-4
DWYER Differential Pressure Transmitter, Range 0-2.5" W.C. view more
  • Pressure Range - Inches WC: 0 to 2.5
  • Cover - No Cover
  • Certificates - No Additional Certifications
100+ In Stock
$2,000.00 CAD
$10.00 Shipping
668C-14-NISTCAL-PT1
  • Pressure Range - Inches WC: 0 to ± 2.5
  • Cover - Conduit Cover
  • Certificates - NIST Traceable Calibration Certificate
100+ In Stock
$1,027.00 CAD
$10.00 Shipping
668-14-NISTCAL-PT1
  • Pressure Range - Inches WC: 0 to ± 2.5
  • Cover - No Cover
  • Certificates - NIST Traceable Calibration Certificate
100+ In Stock
$1,756.00 CAD
$10.00 Shipping
668C-11-NISTCAL-PT1
  • Pressure Range - Inches WC: 0 to ± 0.25
  • Cover - Conduit Cover
  • Certificates - NIST Traceable Calibration Certificate
100+ In Stock
$2,231.00 CAD
$10.00 Shipping
668-19
DWYER Differential Pressure Transmitter, Range 0-0.4" W.C.
100+ In Stock
$2,490.00 CAD
$10.00 Shipping
668C-2
  • Pressure Range - Inches WC: 0 to 0.5
  • Cover - Conduit Cover
  • Certificates - No Additional Certifications
100+ In Stock
$1,592.00 CAD
$10.00 Shipping
668-6
DWYER Differential Pressure Transmitter, Range 0-10" W.C. view more
  • Pressure Range - Inches WC: 0 to 10
  • Cover - No Cover
  • Certificates - No Additional Certifications
100+ In Stock
$1,090.00 CAD
$10.00 Shipping
668C-3
  • Pressure Range - Inches WC: 0 to 1
  • Cover - Conduit Cover
  • Certificates - No Additional Certifications
100+ In Stock
$1,346.00 CAD
$10.00 Shipping
668-2
DWYER Differential Pressure Transmitter, Range 0-0.5" W.C. view more
  • Pressure Range - Inches WC: 0 to 0.5
  • Cover - No Cover
  • Certificates - No Additional Certifications
50+ In Stock
$1,311.00 CAD
$10.00 Shipping
668-1
DWYER Differential Pressure Transmitter, Range 0-0.25" W.C. view more
  • Pressure Range - Inches WC: 0 to 0.25
  • Cover - No Cover
  • Certificates - No Additional Certifications
50+ In Stock
$1,809.00 CAD
$10.00 Shipping
668-9-NISTCAL-PT1
  • Pressure Range - Inches WC: 0 to 100
  • Cover - No Cover
  • Certificates - NIST Traceable Calibration Certificate
50+ In Stock
$299.00 CAD
$10.00 Shipping
668C-5
  • Pressure Range - Inches WC: 0 to 5
  • Cover - Conduit Cover
  • Certificates - No Additional Certifications
50+ In Stock
$1,756.00 CAD
$10.00 Shipping
668C-8-NISTCAL-PT1
  • Pressure Range - Inches WC: 0 to 50
  • Cover - Conduit Cover
  • Certificates - NIST Traceable Calibration Certificate
50+ In Stock
$396.00 CAD
$10.00 Shipping
668-11
  • Pressure Range - Inches WC: 0 to ± 0.25
  • Cover - No Cover
  • Certificates - No Additional Certifications
50+ In Stock
$567.00 CAD
$10.00 Shipping
668-14
  • Pressure Range - Inches WC: 0 to ± 2.5
  • Cover - No Cover
  • Certificates - No Additional Certifications
50+ In Stock
$1,574.00 CAD
$10.00 Shipping
668C-11
  • Pressure Range - Inches WC: 0 to ± 0.25
  • Cover - Conduit Cover
  • Certificates - No Additional Certifications
50+ In Stock
$2,047.00 CAD
$10.00 Shipping
668C-3-NISTCAL-PT1
  • Pressure Range - Inches WC: 0 to 1
  • Cover - Conduit Cover
  • Certificates - NIST Traceable Calibration Certificate
50+ In Stock
$496.00 CAD
$10.00 Shipping
668-3-NISTCAL-PT1
  • Pressure Range - Inches WC: 0 to 1
  • Cover - No Cover
  • Certificates - NIST Traceable Calibration Certificate
50+ In Stock
$2,295.00 CAD
$10.00 Shipping
668-5
DWYER Differential Pressure Transmitter, Range 0-5.0" W.C. view more
  • Pressure Range - Inches WC: 0 to 5
  • Cover - No Cover
  • Certificates - No Additional Certifications
50+ In Stock
$2,401.00 CAD
$10.00 Shipping
668-2-NISTCAL-PT1
  • Pressure Range - Inches WC: 0 to 0.5
  • Cover - No Cover
  • Certificates - NIST Traceable Calibration Certificate
50+ In Stock
$367.00 CAD
$10.00 Shipping
668C-14
  • Pressure Range - Inches WC: 0 to ± 2.5
  • Cover - Conduit Cover
  • Certificates - No Additional Certifications
50+ In Stock
$118.00 CAD
$10.00 Shipping
668-3
DWYER Differential Pressure Transmitter, Range 0-1.0" W.C. view more
  • Pressure Range - Inches WC: 0 to 1
  • Cover - No Cover
  • Certificates - No Additional Certifications
50+ In Stock
$226.00 CAD
$10.00 Shipping
668C-2-NISTCAL-PT1
  • Pressure Range - Inches WC: 0 to 0.5
  • Cover - Conduit Cover
  • Certificates - NIST Traceable Calibration Certificate
50+ In Stock
$1,867.00 CAD
$10.00 Shipping
668C-5-NISTCAL-PT1
  • Pressure Range - Inches WC: 0 to 5
  • Cover - Conduit Cover
  • Certificates - NIST Traceable Calibration Certificate
50+ In Stock
$669.00 CAD
$10.00 Shipping
668-10
  • Pressure Range - Inches WC: 0 to ± 0.1
  • Cover - No Cover
  • Certificates - No Additional Certifications
50+ In Stock
$401.00 CAD
$10.00 Shipping
668-5-NISTCAL-PT1
  • Pressure Range - Inches WC: 0 to 5
  • Cover - No Cover
  • Certificates - NIST Traceable Calibration Certificate
50+ In Stock
$764.00 CAD
$10.00 Shipping
668-6-NISTCAL-PT1
  • Pressure Range - Inches WC: 0 to 10
  • Cover - No Cover
  • Certificates - NIST Traceable Calibration Certificate
50+ In Stock
$246.00 CAD
$10.00 Shipping
668C-10
  • Pressure Range - Inches WC: 0 to ± 0.1
  • Cover - Conduit Cover
  • Certificates - No Additional Certifications
25+ In Stock
$1,646.00 CAD
$10.00 Shipping
668C-17
  • Pressure Range - Inches WC: 0 to ± 25
  • Cover - Conduit Cover
  • Certificates - No Additional Certifications
25+ In Stock
$312.00 CAD
$10.00 Shipping
668-11-NISTCAL-PT1
  • Pressure Range - Inches WC: 0 to ± 0.25
  • Cover - No Cover
  • Certificates - NIST Traceable Calibration Certificate
25+ In Stock
$1,066.00 CAD
$10.00 Shipping
668-9
DWYER Differential Pressure Transmitter, Range 0-100" W.C. view more
  • Pressure Range - Inches WC: 0 to 100
  • Cover - No Cover
  • Certificates - No Additional Certifications
25+ In Stock
$1,069.00 CAD
$10.00 Shipping
668C-1-NISTCAL-PT1
  • Pressure Range - Inches WC: 0 to 0.25
  • Cover - Conduit Cover
  • Certificates - NIST Traceable Calibration Certificate
25+ In Stock
$254.00 CAD
$10.00 Shipping
668C-10-NISTCAL-PT1
  • Pressure Range - Inches WC: 0 to ± 0.1
  • Cover - Conduit Cover
  • Certificates - NIST Traceable Calibration Certificate
25+ In Stock
$2,024.00 CAD
$10.00 Shipping
668C-4
  • Pressure Range - Inches WC: 0 to 2.5
  • Cover - Conduit Cover
  • Certificates - No Additional Certifications
25+ In Stock
$510.00 CAD
$10.00 Shipping
668-7
DWYER Differential Pressure Transmitter, Range 0-25" W.C. view more
  • Pressure Range - Inches WC: 0 to 25
  • Cover - No Cover
  • Certificates - No Additional Certifications
25+ In Stock
$1,424.00 CAD
$10.00 Shipping
668-8-NISTCAL-PT1
  • Pressure Range - Inches WC: 0 to 50
  • Cover - No Cover
  • Certificates - NIST Traceable Calibration Certificate
25+ In Stock
$954.00 CAD
$10.00 Shipping
668-17-NISTCAL-PT1
  • Pressure Range - Inches WC: 0 to ± 25
  • Cover - No Cover
  • Certificates - NIST Traceable Calibration Certificate
25+ In Stock
$1,411.00 CAD
$10.00 Shipping
Show More Models (13)

View Details

Specifications

Brand

Accuracy

  • ± 1 % Full Scale (RSS)

Approvals & Certifications

  • CE

Compensated Temperature

  • -18° to 65° C (0° to 150° F)

Electrical Connectors

  • Terminal Strip

Enclosure, Body Material

  • Fire Retardant Glass-Filled Polyester

Hysteresis

  • ± 1 % of Full Scale

Loop Resistance

  • 0 to 800 ohms

Media

  • Air
  • Non-Conductive Gases

NACE & NIST

  • NIST Traceable Calibration Certificate

Operating Temperature

  • -18° to 65° C (0° to 150° F)

Output

  • 4-20 mA, 2-Wire

Pressure Range

  • Inches WC: 0 to 100

Pressure Type

  • Differential

Response Time

  • < 60 milliseconds

Span & Zero Adjustments

  • ± 1 mA, Non-Interactive

Storage Temperature

  • -40° to 85° C (-40° to 185° F)

Supply Voltage

  • 12-30 Vdc

Temperature Effect

  • 0.018 % of Full Scale/°C
  • 0.033 % of Full Scale/°F

Tube Connection

  • 3/16” O.D. Fitting for 1/4” I.D. Tubing

  • Variable air volume systems
  • HVAC
  • Building management

Documentation

Data Sheets

Approvals

Catalogs

Manuals

show more