Series 1230/1235 Flex-Tube Well-Type Manometer

Brand: Dwyer Instruments, LLC

Dwyer Series 1230 & 1235 Flex-Tube Well Type Manometers are designed to meet the need for a direct reading single column instrument providing highly accurate pressure readings; positive, negative or differential.

Dwyer manometers have no hidden wells or packing glands.

These instruments are constructed of shatterproof clear plastic tubing permanently bonded to well assemblies with leakproof glued joints. Well assemblies are precisely machined from solid acrylic plastic.

Overpressure safety traps assure protection against loss of fluid. Heavy pure white acrylic plastic scales have sharp black silk screened figures and graduations sealed with clear mylar coating.

Scales are adjusted with quick-acting positive mechanism. Heavy heat treated aluminum back plates have durable gray hammerloid finish.

These manometers are rated to 100 psig (6.89 bar). Not recommended for vacuum service beyond 5 Inches Hg (68 Inches WC).
  • High-accuracy pressure measurement suitable for laboratory or general industry
  • Precision built assures device meets the highest standards
  • No moving parts means no calibration or nothing to wear out
  • Over-pressure trap prevents liquid from being expelled from gauge, preventing disruption of operation 



  • Panel Mount
  • Wall Mounted


  • NIST Traceable Calibration Certificate

NPT Connection

  • 1/8” NPT Male

Pressure Range

  • Inches WC: 0 to 36

Tube Connection

  • 1/8” NPT Tubing Adapter

  • Laboratory & Industrial Service Applications
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