Model 212.25

Bourdon Tube Pressure Gauges

Hinged Ring Process Gauge
Brass Wetted Parts

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  • Pressure monitoring panels
  • Suitable for gaseous or liquid media that will not obstruct the pressure system or attack copper alloy 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 1,000 psi (70 bar)


ASME B40.100

4½” & 6” (115 & 160 mm) dial size

Accuracy class
± 0.5% of span (ASME B40.100 Grade 2A)

Vacuum / Compound to 200 psi (16 bar)
Pressure from 15 psi (1 bar) to 1,000 psi (70 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: copper alloy
Lower back mount (LBM)
1/4” or 1/2” NPT with M4 internal tap

Bourdon tube
Material: copper alloy

Stainless steel. Internal stop pin at 1.1 x full scale

White aluminum with black lettering, 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

Bourdon Tube Pressure Gauges<br>
Model 212.25

Bourdon Tube Pressure Gauges
Model 212.25

  • Bourdon Tube Pressure Gauges<br>
Model 212.25
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