Design
ASME B40.100
Sizes
4½” & 6” (115 & 160 mm) dial size
Accuracy class
± 0.5% of span (ASME B40.100 Grade 2A)
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
Steady: full scale value Fluctuating: 0.9 x full scale value Short time: 1.5 x full scale value
Operating temperature
Ambient: -40°F to +150°F(-40°C to +65°C) dry -4°F to +150°F(-20°C to +65°C) glycerine filled -40°F to +150°F(-40°C to +65°C) silicone filled Medium: max. +212°F (+100°C)
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)-without membrane Weather tight (NEMA 4X / IP66)-dry case or filled case with membrane installed
Pressure connection
Material: Monel® M400 Lower mount (LM) or lower back mount (LBM) 1/4” or 1/2” NPT with M4 internal tap
Restrictor
Material: Monel® (0.6 mm)
Bourdon tube
Material: Monel® M400 ≤1,000 PSI (70 bar): C-shape, >1,000 PSI (70 bar): Helical
Movement
Stainless steel
Internal overload stop set at 1.1x full scale
Underload stop-optional
Dampened movement-optional
Dial
White aluminum with black lettering, stop pin at 6 o’clock
Standard WIKA psi single scales (4½" only) with large figures at beginning & end for quick and easy range identification
Pointer
Black aluminum, adjustable
Case
Black fiberglass-reinforced thermoplastic (POCAN)
Solid front, blowout back
Turret-style case with built in rear flange lugs
Window
Clear acrylic with Buna-N gasket
Case filling
Glycerine 99.7% - Type 263.34
Optional extras
Silicone dampened movement
Panel mounting adaptor kit (field assembled)
Silicone case filling
Halocarbon case filling
Cleaned for oxygen service
Instrument glass or safety glass window
Drag pointer (maximum reading indicator)
Alarm contacts switches (magnetic or inductive)
Special process connections
Custom dial layout
External zero adjustment (4.5” size only)
Case & ring in red or yellow thermoplastic (4½ LM only)
InSight reflective dial options available in white, fluorescent yellow, flurescent orange or glow-in-the-dark