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 1,000 psi (60 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: +150°F (+65°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)-without membrane
Weather tight (NEMA 4X / IP66) - dry case or filled case with membrane installed
Pressure connection
Material: Copper alloy
Lower mount (LM) or lower back mount (LBM)
1/4” or 1/2” NPT with M4 internal tap
Restrictor
Material: Stainless steel (0.6 mm)
Bourdon tube
Material: Copper alloy
C-type
Movement
Copper alloy
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 213.34
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