Model PGS21

switchGAUGE, Bourdon tube pressure gauges with factory-set switch contacts

Stainless steel case

Selected documents
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  • For indicating and monitoring the pressure in tanks and for signalling of potential leaks
  • For use in gas extinguishing systems
  • General industrial applications

Special Features

  • High switching reliability and long service life
  • Switch contacts factory-set according to customer specification
  • NEMA 6 / IP 65 weather protection
  • B40.100 & EN 837-1

Standard Features

ASME B40.100 & EN 837-1

1½" or 2" (40 or 50 mm)

Accuracy class
± 2/1/2% of span (ASME B40.100 Grade B)

Switch point tolerance
± 2.5% of span

1½": 0/60 to 0/6000 PSI
2": 0/15 to 0/6000 PSI
or other equivalent units of pressure or vacuum

Working range
Steady: 3/4 x full scale value
Fluctuating: 2/3 x full scale value
Short time: full scale value

Operating temperature
Ambient: -4°F to +140°F (-20°C to +60°C)
Medium: +140°F (+60°C) maximum

Temperature error
Additional error when temperature changes from reference temperature of 68°F (20°C) ±0.4% for every 18°F (10°C) rising or falling. Percentage of span.


Material: Copper alloy
1½": Center back mount (CBM)
2": Lower mount (LM) or center back mount (CBM)
14 mm wrench flats

Bourdon tube
Material: Copper alloy
≤ 1000 PSI; C-type
> 1000 PSI; helical-type

Copper alloy

White aluminum with black lettering

Black plastic

Stainless steel


Weather protection
NEMA 6 / IP 65

Helium leak test
Leak rate 10-5 mbar*l/s

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