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Murphy

20P-HL-300 (05703733): Pressure Swichgage

The 20P-HL-300 Swichgage is a 2" diaphragm-actuated pressure indicating gauge with a 0-300 psi range. This model has built-in electrical switches for tripping alarms and/or shutdown devices and features a high and a low adjustable contact with knobs for easy adjustment. “H” models feature high and low contacts. The gauge mechanism is enclosed in a steel case coated to resist corrosion. A polycarbonate, break-resistant lens and a polished, stainless steel bezel help protect this rugged instrument. The gauge mechanism is enclosed in a steel case coated to resist corrosion. A polycarbonate, break-resistant lens and a polished, stainless steel bezel help protect this rugged instrument.

Accuracy and protection from moderate overpressure is assured by a unique, unitized diaphragm chamber. A built-in pulsation dampener helps eliminate pointer flutter and is removable for cleaning. Inside the 20P-HL-300, the gauge pointer acts as a pressure indicator and as one switch pole which completes a circuit when it touches the adjustable limit contact. Contacts are grounded through the case and have a self-cleaning motion to ensure electrical continuity.