Murphy Pressure Gauges

SKU: 20/25P

Quick Description

The 20 Series (2 inch/51 mm dial) and the 25 Series (2-1/2 inch/64 mm dial) Swichgauge models are diaphragm actuated, pressure indicating gauges with built-in electrical switches. These switches are used for tripping alarms and/or shutdown devices.

 

More Murphy Equipment

Full Description
Product Variations
Description
Part Number
Price
Quantity
Lead Time
0-100psi Switchgauge 2" (20P)
EPM300010
£42.50
- +
ex-stock
0-200psi Switchgauge 2" (20PHLK)
EPM300030
£55.00
- +
2-3-weeks
0-300psi Switchgauge 2" (20PHLK)
EPM300040
£61.00
- +
2-3-weeks
0-14Bar Switchgauge 2 1/2" (A25PHLK)
EPM300050
£90.00
- +
1-2-days
Total price: £0.00

Murphy pressure gauges are available from 0-15 psi (1.0 bar]) through 0-400 psi (28 bar).

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, built-to-last instrument. Accuracy and protection from moderate over pressure is assured by a unique, unitised diaphragm chamber.

A built-in pulsation dampener helps eliminate pointer flutter and is removable for cleaning.

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 self-cleaning motion to ensure electrical continuity.

Murphy Pressure Gauges with front contact

20P – 2″ Gauge, 0-100psi (0-7bar

Pressure Switchgauges with adjustable hi-lo contacts

20PHLK – 2″ Gauge, 0-200psi (0-14bar)

20PHLK – 2″ Gauge, 0-300psi (0-20bar)

A25PHLK – 2 1/2″ Gauge, 0-14bar

 

The 20 Series (2 inch/51 mm dial) and the 25 Series (2-1/2 inch/64 mm dial) Swichgauge models are diaphragm-actuated, temperature-indicating gauges with built-in electrical switches for tripping alarms and/or shut-down devices.

Ranges are available from 32°-120°F (0°-45°C) through 300°-440°F (160°-220°C).

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, built-to-last instrument.

These vapour-actuated gauges feature a sealed capillary tube and a sensing bulb. When subjected to heat, the liquid in the sensing bulb changes to vapour creating pressure against the diaphragm mechanism. The diaphragm translates this vapour pressure into a mechanical gauge reading.

For series 20T and 25T, the gauge pointer acts as a temperature indicator and as one switch pole which completes a circuit when it touches the adjustable limit contact. Contact(s) are grounded through the Swichgauge case. They have a self-cleaning motion to enhance electrical continuity.

These instruments are used on equipment in oil field and monitoring engine coolant, crankcase oil and transmission oil.

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