Bourdon Tube Pressure Gauge
Model 233.34

Subsea Gauge - Stainless Steel
Type 233.34 - Special


  • Subsea environments: tested to working depths of 10,000 ft. of sea water
  • Suitable for corrosive environments and gaseous or liquid media that will not obstruct the pressure system

Special Features

  • Excellent load-cycle stability and shock resistance
  • Solid front thermoplastic case
  • Positive pressure ranges to 30,000 psi
  • Black dial face with white enlarged numerals for subsea visualization
  • Optional easy-to-assemble Lexan Shield kit for extra protection

Standard Features

ASME B40.100

4½" (115 mm) dial size

Accuracy class
± 0.5% of span (ASME B40.100 Grade 2A)
± 1.0% of span (ASME B40.100 Grade 1A)
(for 20,000 psi range and above)

Temperature error
Additional error when temperature changes from reference
temperature of 68°F (20°C) ±0.4% for every 18°F (10°C) rising
or falling. Percentage of span.

Operating temperature
Ambient: -4°F to +150°F (-20°C to +66°C) - glycerine filled
Medium: max. +212°F (+100°C) (See Note 1 on reverse)

Customized for subsea applications: standard ranges from
5,000 psi to 30,000 psi

Black fiberglass-reinforced thermoplastic (POCAN)
Solid front, blowout back
Turret-style case with built in rear flange lugs

Dual pane safety glass (increases stability/integrity and
minimizes deflection from external seawater pressure)

Note 1: The maximum continuous media temperature for the WIKA Subsea gauge is 212°F (130°C) with intermittent maximum media temperature limits of 250°F (130°C). The user should also consider temperature error and gauge component degradation when exposing the gauge to any media or ambient temperature above 212°F. For continuous use in either ambient or media temperatures above 212°F, a diaphragm seal or other heat dissipating means is recommended. Consult factory for technical inquiries and application assistance.

Working pressure
Steady:         full-scale value
Fluctuating:  0.9 x full-scale value
Short time:   1.5 x full-scale value

Pressure connection
Material: 316L SS
Lower mount (LM) or lower back mount (LBM)
High-pressure autoclave, F250C (9/16-18 UNF RH FEMALE)
½" NPT

Bourdon tube
Material: 316L SS, helical type

Stainless steel. Internal stop pin at 1.3 x full scale
Overload and underload stops - standard

Black dial face with white enlarged numerals for subsea visualization

White aluminum, adjustable

Case filling
Glycerin filled 99.7%
FDA compliant
Degassed to remove any impurities (N2, Oxygen, entrained gases) in order to minimize/eliminate compressibility of fill fluid 100% case fill, no bubble

Optional extras

  • Lexan Shield kit for extra protection
  • Special process connections
  • Custom dial layout
  • Anti-glare window
  • Restrictor (for NPT connections only)

Available in: Alabama, Arizona, Arkansas, N.W. Florida, S. Idaho, Kansas, Louisiana, Mississippi, W. Missouri, Montana, Nevada, New Mexico, W. North Dakota, Oklahoma, W. South Dakota, Texas, Utah and Wyoming