Series 7000/7000B Spirahelic Pressure Gauge

Brand: Dwyer Instruments, LLC

The Series 7000 Spirahelic® Pressure Gauges employ a unique triple helix Bourdon tube for precision measurement of compatible gases and liquids.

The direct drive design reduces friction and mass, resulting in exceptionally good responsiveness, repeatability and accuracy. Because there are no gears, springs, linkages or other complicated mechanisms, wear is practically eliminated. 

The Series 7000 has solid brass or 316 stainless steel connection block features convenient dual 1/4" female NPT ports-one each on back and bottom. Block also includes integral filter plug to keep dirt out. Safety is assured with solid front case design and rear blowout hole.

Gauges fit ASME standard panel cutouts, 4.94" (125 mm) -7100; 6.5" (165.1 mm) -7300.

Series 7000B Spirahelic® Direct Drive Pressure Gauges with turret mount housings feature a triple coil spiral/helical wound Bourdon tube to provide dependable service.

Bourdon tube design eliminates gears, springs, linkages and complex movements which can wear and cause inaccuracy or early failure. 

Series 7000B gauges come standard with a dual-size 1/2" male NPT and 1/4" female NPT process connection.
  • Direct drive design with single moving part maximizes lifespan and accuracy without the need to recalibrate
  • Elastic Bourdon tube resists overpressure and returns to original setting
  • Blowout hole prevents early failure from high overpressure conditions
  • Single element sensing means total lower cost of ownership because of long service life and lower cost to maintain



  • 0.5 % of Full Scale Grade 2A

Approvals & Certifications

  • ASME B40.1

Enclosure, Body Material

  • Black Polycarbonate Case
  • Clear Acrylic Cover


  • Acrylic Lens


  • Liquids & Gases

NPT Connection

  • 1/2” NPT Male
  • Two 1/4” NPT FemaleField-Selectable Back or Bottom Connection

Pressure Range

  • bar: 0 to 68.95
  • kPa: 0 to 6,895
  • psi: 0 to 1,000

Proof Pressure

  • 150 % of Full Scale Gage


  • Dial: 4.5”
  • Dial: 8.5”

Temperature Range

  • -53.9° to 82.2° C (-65° to 180° F)

Wetted Materials

  • 316L Stainless Steel Connection Block
  • Bourdon Grade A Accuracy Inconel X-750 Alloy Bourdon Tube
  • Brass
  • Inconel X-750

  • Systems with high cycle rates
  • Processes with problematic pressure surges and spikes
  • Environments with continuous vibration or shock
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