Model 233.50SUBSEA

Subsea Gauge

All Stainless Steel -
Special Compensated

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  • Subsea in compensated subsea environments: Tested to working depths of up 10,000 feet of sea water
  • Suitable for corrosive environments and gaseous or liquid media that will not obstruct the pressure system

Product features

  • Excellent load-cycle stability and shock resistance
  • All 316 stainless steel construction
  • Positive pressure ranges to 20,000 psi (1,600 bar)
  • Black dial face with white enlarged numerals for subsea visualization
  • Matte black finish case and mounting hardware for low reflectivity


ASME B40.100

2½” (63, 100 mm) dial size

Accuracy class
2½”:  ±2/1/2% of span per ASME B40.100 Grade 2A)
4":     ± 1.0% of span per ASME B40.100 Grade 1A

Vacuum/compound to 200 psi (16 bar)
Pressure from 0/15 psi (1 bar) to 20,000 psi (1,600 bar) or other equivalent units of pressure or vacuum

Working pressure
2½”:   Steady: 3/4 scale value
          Fluctuating: 2/3 Full-scale value
          Short time: Full-scale value
4”:     Steady: Full-scale value
         Fluctuating: 0.9 x full-scale value
         Short time: 1.3 x full-scale value

Operating temperature
Ambient: -40°F to +140°F (-20°C to +60°C) - dry
Media: max. +212°F (+100°C)

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

Weather protection
IP 68
Protected against continuous submersion in up to 10,000 feet (3048m) of ocean depth

Pressure connection
Material: 316L stainless steel
Center back mount (CBM) for size 2-½”
Lower back mount (LBM) for size 4"
1/8"NPT (size 2-½” 1/4"NPT (size 2-½” & 4")
and ½” NPT (size 4")
(consult factory for other connections)

Bourdon tube
316L stainless steel
≤ 1,000 psi (70 bar): C-shape,
> 1,000 psi (70 bar): Helical

Stainless steel

Black aluminum (matte finish) with white lettering; 2-1/2" with stop pin

White aluminum, adjustable

316 Stainless Steel with vinyl compensating membrane

Case Fill
Glycerin/water mixture 86.5 /13.5%
FD compliant
Degassed to remove any impurities (N2, Oxygen, entrained gases) in order to minimize/eliminate compressibility of the fill fluid. 99% case fill, (air bubble no larger than 1/2" behind window when gauge is laid flat).

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