Design
ASME B40.100 & EN 837-1
Sizes
2”, 2½” & 4” (50, 63 and 100 mm)
Accuracy class
 2” & 2½”: ± 2/1/2% of span (ASME B40.100 Grade A)

Ranges

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

2” & 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

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: +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 tight (NEMA 4X / IP65)
Pressure connection
Material: 316 stainless steel
Lower mount (LM) or center back mount (CBM)
Lower back mount (LBM) for 4” size
1/8” NPT, 1/4” NPT or 1/2” NPT limited to wrench flat area
Bourdon tube
Material: 316 stainless steel
> 1,500 psi (100 bar): C-shape,
< 1,500 psi (100 bar): Helical type
Movement
Stainless steel
Dial
 White aluminum with black lettering, 2” and 2½” with stop pin

Pointer
Black aluminum
Case
304 stainless steel with vent plug and SS crimp ring
Welded case / socket connection
Window
Polycarbonate
Liquid filling
Glycerine 99.7% – Type 233.53
Recommended panel cutout is dimension D + 3 mm
Optional extras
* SS restrictor
* SS front flange
* SS rear flange (2½” and 4” only)
* Zinc-plated steel or SS u-clamp bracket (field installable – see note)
* Cleaned for oxygen service
* Red drag pointer or mark pointer (2½” and 4” only)
* External zero adjustment (4” size only)
* Other pressure connections
* Silicone or Halocarbon Oil case filling
* Other pressure scales available: bar, kPa, MPa, kg/cm² and dual scales
 Note: U-clamp bracket for 2” must be ordered with gauge