Design
ASME B40.100 & EN 837-3
Sizes
2½”, 4” & 6” (63, 100 and 160 mm)
Accuracy class
±1.5% of span
Ranges
Size 2½ (63 mm): 0...16" H2O (40 mbar) tp 0...250" H2O (600 mbar)
Size 4" (100 mm): 0...6" H2O (16 mbar) tp 0...250" H2O (600 mbar)
Size 6" (160 mm): 0...1" H2O (2.5 mbar) tp 0...250" H2O (600 mbar)
Working pressure
Steady: full scale value
Fluctuating: 0.9 x full scale value
Operating temperature
Ambient: -4°F to +140°F (-20°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) ±0.6% of span for every 18°F (10°K) rising or falling.
Weather protection
Weather resistant (NEMA 3 / IP54)
with case filling NEMA 4X / IPP66
Pressure connection
Material: 316L stainless steel
Lower mount (LM) or center back mount (CBM) - 2½” (63 mm)
Lower mount (LM) or lower back mount (LBM) - 4” & 6” (100 mm & 160 mm)
1/4” NPT or 1/2” NPT limited to wrench flat area
Capsule element
Material: 316L stainless steel with Viton sealing ring
Movement
Stainless steel
Zero Adjustment Dial
White aluminum with black lettering
Pointer
Black aluminum
Case
304 stainless steel with stainless steel bayonet ring
Window
Laminated safety glass
Acrylic for case filling (633.50)
Case fill
Silicone - Type 633.50
(only available for full scale ranges ≥ 40” H2O)