Murphy 2 " 20P Pressure Swichgage®
Murphy Engine Oil Pressure Gauge ( 20P-150 )
Murphy Exhaust Tempurature Gauge ( 20P-300 )
SPECIFICATIONS
PDF File
Dial: White on black, dual scale; U.S.A. standard scale is psi/kPa; U.K. standard scale is psi/bar; others available (see How to Order).
Case: Plated steel; mounting clamp included (except for direct mount models).
Bezel: Polished stainless steel,standard; others are available (see How to Order).
Lens: Polycarbonate, high-impact.
Oil: Silicon Oil.
Temperature Range:
Ambient: -40°F (-40°C) thru 150°F (66°C).
Process: -40°F (-40°C) thru 250°F (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% |
| 400 psi (28 Bar) | ±3% | ±3% | ±5% |
Maximum Pressure: See Pressure Ranges and Factory Settings table on page 2.
Adjustable Limit Contact (20P and 25P):
SPST contact; pilot- duty only, 2 A @ 30 VAC/DC;
Normally Close (NC) when the low limit is met.
Normally Open (NO) when pointer is in normal operating range. Contacts are gold flashed silver.
Limit Contact Adjustment: by a 1/16 in. hex wrench thru 100% of the scale.
Limit Contact Wire Leads: 18 AWG (1.0 mm2) x12 in. (305 mm).
Snap-Switch Rating (20PE and 25PE):
SPDT, 3 A@ 30 VDC inductive; 4 A @ 125 VAC inductive.
Snap-Switch Wire Leads: 20 AWG (0.75 mm2) x12 in. (305 mm).
Unit Weight:
20 Series: 8 oz. (0.23 kg).
25 Series Models: 11 oz. (0.31 kg).
Unit Dimensions:
20 Series: 3 x 3 x 3 in. (76 x 76 x 76 mm).
25 Series Models: 4-3/4 x 4-3/4 x 2-3/4
in. (121 x 121 x 70 mm).
