Model 230.25

Bourdon Tube Pressure Gauges

Ultra High Purity (UHP) Series

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  • Semiconductor and electronic industry, medical industry, gene technology, biotechnology and pharmaceutical industries.

  • Suitable for corrosive environments and gaseous or liquid media that will not obstruct the pressure system

  • Where measurement of high purity gases is needed without contamination of the process media.

Special Features

  • 316L SS and 316L SS VIM/VAR wetted parts

  • Electropolished SS case, socket & face-seal connection

  • Positive and compound pressure ranges to 5000 psi

Standard Features

ASME B40.100

2" (50 mm) 1 ½" (40 mm)

Accuracy Class
2": ± 2/1/2% of span (ASME B40.100 Grade A)
1 ½": ± 3/2/3% of span (ASME B40.100 Grade B)

Vacuum / compound to 30"Hg/0/300 psi
Pressure from 15 psi up to 5000 psi or other equivalent units of pressure or vacuum

Working Pressure
Steady: ¾ full-scale value
Fluctuating: 2/3 full-scale value
Short time: 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% for every 18°F (10°C) rising or falling. Percentage of span.

Weather Protection
Weather resistant (NEMA 3 / IP 54)

Pressure Connection
Material: Face-seal nut, 316 SS
               Face-seal gland, 316L SS VOD or VIM/VAR
Position: Lower mount (LM)
               Center back mount (CBM)
Type of Connection: Face-seal fixed male, swivel male or female
Wetted Surface Finish: Ra < 0.25μm (Ra < 10μinch)

Bourdon Tube
Material: 316L SS
30”Hg (vac) to 1,000 psi, C-type
1,500 to 5,000 psi, helical type
Helium leak tested 1 x 10-9 scc/sec (inboard)

Material: 316L VIM/VAR electropolished
               Ra < 0.25μm (Ra < 10μinch) - internal

Stainless steel

White aluminum with stop pin and black lettering

Black aluminum

304 SS, electropolished

Polycarbonate: twist-lock (2"), snap cap (1½")

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