Description
Absolute pressure gauge WIKA
Absolute pressure gauge WIKA are often used when readings must not be influenced by changes in atmospheric pressure. In absolute pressure, zero pressure is referred against total vaccum to provide measurements that are definite.
The measuring accuracy for WIKA’s absolute pressure gauges is ensured for fluctuations in atmospheric pressure between 955 and 1,065 mbar (min. and max. of atmospheric pressure).
Accuracy class
- 532.51 6″ (160 mm): 0.6
- 532.52: 1.0
- 532.53: 1.6
- 532.54: 2.5
Nominal size
4″ & 6″ (100 mm & 160 mm)
Scale ranges
0…10 H2O (25 mbar) to 0…360 psi (25 bar) absolute pressure
Pressure limitation
Steady: full scale value
Fluctuating: 0.9 x full scale value
Overpressure Safety
Minimum 15 psi (1 bar) absolute pressure (atmospheric pressure)
in addition 10 x full scale value, max. 360 psi (25 bar) absolute pressure
Operating Temperature
Ambient: -4°F…140oF (-20°C) to 140°F (60°C)
Media: max. + 212°F (+100°C)
Temperature error
Additional error when temperature changes from reference temperature of 68°F (20°C) ± 0.8% of span for every 18°F (10°K) rising or falling.
Ingress protection
NEMA 3 (IP 54 per EN 60529 / IEC 529)
Process connection (wetted)
316 Stainless steel, lower mount (LM)
1/2″ NPT (male), 22 mm wrench flat
Pressure element (wetted)
≤ 100 H2O (0.25 bar): 316 Stainless steel
> 100″ H2O (0.25 bar): NiCr-alloy (Inconel)
Measuring chamber (wetted)
316 Stainless steel
Movement
Stainless steel
Dial
Aluminum, white, black lettering
Pointer
Adjustable pointer, aluminum, black
Case
Stainless steel, with pressure relief disc Gagues with liquid filling with compensating valve to vent case
Window
Laminated safety glass
Bezel ring
Bayonet bezel
Mounting by means of:
- Stem mounted
- Mounting bracket for wall or pipe mounting (opton)
- Panel or surface mounting flange (option)
Absolute pressure is measured relative to a full vacuum.
Alternatively, pressure that is measured against atmospheric pressure is called gauge pressure.
A full vacuum has an absolute pressure reading of 0 psi and average barometric pressure at sea level is ~14.7 psi.
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