Murphy A25P Series Swichgage A25P-OS-100
These pressure-indicating gauges feature built-in electrical switches for activating alarms and/or shutting down equipment.
Corrosion resistant polycarbonate case
Internal pulsation dampener helps eliminate pointer flutter
Maintains accuracy and protection from moderate overpressure
Dial: White on black, dual scale; U.S.A. standard scale is psi/kPa; U.K. standard scale is psi/bar
Case: Polycarbonate/glass filled, corrosion-resistant; steel mounting clamp included
Bezel: Polished stainless steel, standard; others available
Pointer: Tempered nickel silver; red tip
Lens: Polycarbonate, high-impact
Oil: Silicon oil
Temperature Range:
Ambient: -40°to 150° F (-40° to 66°C)
Process: -40° to 250° F (-40° to 121°C)
Process Connection: 1/8-27 NPTM brass
Sensing Element: Beryllium copper diaphragm
Gage Accuracy (% of Full Scale):
| RANGE | LOWER 1/4 | MIDDLE 1/2 | UPPER 1/4 |
| =300 psi (20 Bar) | ±3% | ±2% | ±3% |
Maximum Pressure: See Pressure Ranges and Factory Settings in bulletin
Adjustable Limit Contact (A20P and A25P): SPST contact; pilot-duty only, 2A@30 VAC/DC; Closed when the low limit is met, open when pointer is in normal operating range
Contacts are gold flashed silver
Limit Contact Adjustment: by a 1/16 in. hex wrench through 100% of the scale
Wiring: A25P: Number 6 screw terminals
Snap-Switch Rating (A20PE): SPDT, 3 A@ 30 VDC inductive; 4 A @ 125 VAC inductive
Wiring: A20PE: Number 4 screw terminals
Unit Weight:
A20 Series: 8 oz. (0.23 kg)
A25 Series Models: 11 oz. (0.31 kg)
Unit Dimensions:
A20 Series: 3 x 3 x 3 in. (76 x 76 x 76 mm)
A25 Series Models: 4-3/4 x 4-3/4 x 2-3/4 in. (121 x 121 x 70 mm)