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WIKA 612.20
WIKA 612.20 – (Capsule Pressure Gauge) WIKA/Germany
Applications
- Low pressure pneumatic systems
- Suitable for fluid medium, gaseous or dry that does not corrode copper alloy.
Product features
- Low pressure series
- Copper alloy wetted parts & stainless steel case
- Capsule pressure gauge
Specifications
Design
EN837-3
Size
2.5″, 4″ & 6″ (63 mm, 100 mm & 160 mm)
Accuracy class
± 1.5% of span
Ranges (All ranges not stocked)
Size 2.5″: (63 mm): 0…10 (25 mbar) to 0…250″ H2O (600 mbar)
Size 4″ (100 mm): 0…4″ H2O (10 mbar) to 0…250″ H2O (600 mbar)
Size 6″ (160 mm): 0…2.5″ H2O (600 mbar)
or all other equivalent vacuum or compound ranges
Connection
Copper alloy
Size 2½ (63 mm):
¼” NPT lower moutn (LM) or center back moutn (CBM)
Size 4″ & 6″ (100 mm & 160 mm): ¼” NPT or ½” NPT lower mount (LM) or lower back mount (LBM)
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 / IP 54)
Standard Scales
in. H2O/mm H2O
oz.-sq. in./mm H2O
oz.-sq. in./in. H2O
PSI
Window Gasket
Buna-N
Window
Flat instrument glass
Working Range
Steady: Full scale value
Fluctuating: 0.9 x full scale value
Operating Temperature
Ambient: -4°F to 140°F (-20°C to 60°C)
Media: max. 212°F (+100°C)
max. 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°C) rising or falling.
WIKA 612.20
| Design | EN 837-3 |
| Nominal size in mm | 60, 100, 160 |
| Accuracy class | 1.6 |
| Scale ranges | NS 63: 0 … 40 mbar to 0 … 600 mbar
NS 100: 0 … 16 mbar to 0 … 600 mbar NS 160: 0 … 2.5 mbar to 0 … 600 mbar or all other equivalent vacuum or combined pressure and vacuum ranges or all other equivalent vacuum or combined pressure and vacuum ranges |
| Pressure limitation | Steady: Full scale value
Fluctuating: 0.9 x full scale value |
| Permissible temperature | Ambient: -20 … +60 °C
Medium: ≤ 100 °C + 80 °C maximum (with NS 100 and 160 back mount) |
| Temperature effect | When the temperature of the measuring system deviates from the reference temperature (+20 °C): max. ±0.6 %/10 K of full scale value |
| Process connection | Copper alloy
Lower mount (radial) or lower back mount (NS 63, CBM) NS 63: G ¼ B (male), SW 14 NS 100, 160: G ½ B (male), SW 22 |
| Pressure element | Copper alloy |
| Movement | Copper alloy |
| Dial | Aluminium, white, black lettering |
| Pointer | Aluminium, black |
| Case | Stainless steel |
| Window | Instrument glass |
| Options | ■ Other process connection
■ Overload or vacuum safety with scale ranges > 25 mbar: 10 x full scale value scale ranges ≤ 25 mbar: 3 x full scale value ■ NS 100 and 160: Panel or surface mounting flange ■ NS 100 and 160: Triangular bezel with clamp ■ NS 100 and 160: Ingress protection IP65 ■ Switch contacts model 831 (data sheet AC 08.01) |
