Capsule Pressure Gauge, Copper Alloy - 612.20

Brand: WIKA Alexander Wiegand SE & Co. KG

The model 612.20 capsule pressure gauge is based upon the proven capsule measuring system. The capsule measuring principle is particularly suitable for low pressures.

On pressurisation, the expansion of the capsule element, proportional to the incident pressure, is transmitted to the movement and indicated
Features
  • Low pressure series
  • Copper alloy wetted parts & stainless steel case
  • Capsule pressure gaug

Specifications

Design

  • EN 837-3

Size

  • 2-1/2”, 4” & 6” (63 mm, 100 mm & 160 mm)

Accuracy Class

  • ± 1.5 % of Span

Ranges

  • Or all other Equivalent vacuum or compound Ranges
  • Size 6” (160 mm): 0 ...2.5”H₂O (4 mbar) to 0 ...250”H₂O (600 mbar)
  • Size 4” (100 mm): 0 ...4”H₂O (10 mbar) to 0 ...250”H₂O (600 mbar)
  • Size 2-1/2” (63 mm): 0...10”H₂O (25 mbar) to 0 ...250”H₂O (600 mbar)

Connection

  • Size 4” & 6” (100 mm&160 mm): 1/4” NPT or 1/2” NPT Lower Mount (LM) or Lower back ount (LBM)
  • Size 2-1/2” (63 mm): 1/4” NPT Lower Mount (LM) or Center Back Mount (CBM)
  • Copper Alloy

Capsule Element

  • Material: Copper Alloy

Movement

  • Copper Alloy, Nickel-silver pinion gear and shaft. Zero Adjustment Screw on dial

Dial

  • White Aluminum with Black Lettering

Pointer

  • Black Aluminum (Zero Adjust on Dial. Must remove window to access)

Case

  • 304 Stainless Steel with Stainless Steel bayonet Ring

Weather Protection

  • Weather resistant (NEMA 3 / IP54)

Window

  • Flat Window Glass

Window Gasket

  • Buna-N

Working Range

  • Fluctuating: 0.9 x Full Scale Value
  • Steady: Full Scale Value

Operating Temperature

  • Media: Max. 212° F (+100° C)
  • Ambient: -4° F to 140° F (-20° C to 60° C)
  • Maximum 176° F (+80° C) for 4” & 6” LBM

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.

  • Low pressure pneumatic systems
  • Suitable for fluid medium, gaseous or dry that does not corrode copper all

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