Series 616W Differential Pressure Transmitter

Brand: Dwyer Instruments, LLC

Positive, negative and differential pressures can be measured within a full span accuracy of ±0.25 with the SERIES 616W Differential Pressure Transmitter.

Units are enclosed in a polycarbonate case, rated NEMA 4X (IP66) and operate by sensing the pressure of air and compatible gases then sending a standard 4-20 mA output signal. Design enables operation in 2-wire current loops. 

A wide range of models are available factory calibrated to specific ranges. The span and zero controls are for use when checking calibration. They are not intended for re-ranging to a significantly different span. The LCD display allows local indication of pressure.
  • NEMA 4X rated enclosure provides protection in harsh environments permitting outdoor monitoring or in areas where dust and particulate matter exists
  • Easy to read LCD display provides immediate local alerts allowing corrective action to be taken quicker to eliminate the problem from becoming widespread
  • Zero and span controls provides easy calibration checks and shorter installation time to get device running and monitoring



  • ± 0.25 % of Full Scale at 25° C (77° F), Display Accuracy ± 0.5 %

Approvals & Certifications

  • CE


  • 40 mA

Electrical Connectors

  • 3-Wire Removable European Style Terminal Block or 16 to 26 AWG

Environmental Protection

  • IP66
  • NEMA 4X

Loop Resistance

  • Current Output: 0-1250 ohms, Max.
  • Voltage Output: Load Resistance 1 Kiloohm (Min.)


  • Air
  • Non-Combustible, Compatible Gases

Mounting Position

  • Any Orientation


  • NIST Traceable Calibration Certificate


  • 0-10 Vdc, 3-Wire
  • 0-5 Vdc
  • 4-20 mA, 2-Wire

Power Requirement

  • 10-35 Vdc (2-Wire)
  • 17-36 Vdc
  • Isolated 21.6-33 Vac (3-Wire)

Pressure Range

  • Inches WC: 0 to 200
  • kPa: 0 to 2.5

Process Connection Material

  • Rubber
  • Vinyl Tubing

Span & Zero Adjustments

  • Push Button


  • ± 1 % of Full Scale Per Year

Temperature Range

  • -10° to 85° C (14° to 185° F)

Tube Connection

  • 3/16” Tube
  • Dual Size to Fit 1/8” & 3/16” I.D. Rubber or Vinyl Tubing

  • Dust collection
  • Outdoor HVAC
  • Roof-top equipment

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