Models 232.30, 233.30

Bourdon Tube Pressure Gauges

Stainless Steel Series, Solid Front Case

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  • With liquid filled case for applications with high dynamic pressure pulsations or vibration
  • Suitable for corrosive environments and gaseous or liquid media that will not obstruct the pressure system 
  • Process industry: chemical/petrochemical, power stations, mining, on and offshore, environmental technology, mechanical engineering and plant construction

Special Features

  • Solid-front stainless steel case
  • Excellent load-cycle stability and shock resistance
  • All stainless steel construction
  • Positive pressure ranges to 20,000 PSI  (1,600 bar)


ASME B40.100 & EN 837-1

2½", 4" & 6" (63, 100, and 160 mm)

Accuracy class
2½": ± 2/1/2% of span (ASME B40.100 Grade A)
4" & 6": ± 1.0% of span (ASME B40.100 Grade 1A)

Vacuum / Compound to 200 psi (16 bar)
Pressure from 0/15 (1 bar) to 0/15,000 psi (1,000 bar) - 2½" & 4"
Pressure from 0/15 psi (1 bar) to 0/20,000 psi (1,600 bar) - 6"
or other equivalent units of pressure or vacuum

Working pressure
2½”:    Steady: 3/4 full scale
           Fluctuating: 2/3 full scale
           Short time: full scale value

4” & 6”: 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 (-40°C to +60°C) - dry
               -4°F to +140°F (-20°C to +60°C) - glycerine filled
               -40°F to +140°F (-40°C to +60°C) - silicone filled
Medium: +392°F (+200°C) maximum - dry
               +212°F (+100°C) maximum - liquid filled

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
Weather tight (NEMA 4X / IP65)

Pressure connection
Material: 316L stainless steel
Lower mount (LM)
Lower back mount (LBM) - 2½” & 4” size only
1/4” NPT or 1/2” NPT limited to wrench flat area

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

Stainless steel

White aluminum with black lettering, 2½” with stop pin

Black aluminum, adjustable


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