Model 332.25

Hinged Ring Test Gauge

316 SS Wetted Parts

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  • Pressure monitoring panels
  • Suitable for corrosive gaseous or liquid media that will not clog the pressure system or attack 316L SS parts.
  • Process industry: chemical/petrochemical, power stations, mining, on and offshore, environmental technology, mechanical engineering and plant construction

Product features

  • Hinged ring for access to adjustable pointer
  • Durable aluminum case
  • Positive pressure ranges to 20,000 psi (1,600 bar)
  • Mirror band dial
  • Knife edge pointer


ASME B40.100

4½” (115 mm)

Accuracy class
Ranges:  ± 0.25% of span (ASME B40.100 Grade 3A) for 
                pressure range ≤ 600 psi (40 bar)
               ± 0.50% of span (ASME B40.100 Grade 2A) for
               pressure range > 600 psi (40 bar) and < 2,000 psi (160 bar)
               ± 0.25% of span (ASME B40.100 Grade 3A) for
              pressure range ≥ 2,000 psi (160 bar)

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

Working pressure
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)
Medium:  +212°F (+100°C) maximum

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 resistant (NEMA 3 / IP54)

Pressure connection
Material: 316L stainless steel
Lower back mount (LBM)
1/4” or 1/2” NPT with M4 internal tap

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

Stainless steel. Internal stop pin at 1.1 x full scale

White aluminum with black lettering, mirror band dial and stop pin at 6 o’clock

Black aluminum, adjustable

Black-painted aluminum with 3 threaded mounting bolts.
Solid front, blowout back safety case. 304 stainless steel blowout back plate

Hinged ring
Black-painted steel with knurled clamping screw

Flat instrument glass with silicone rubber gasket

Mounting bolts
10-24 UNC threads

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