Process Monitoring Instruments

Murphy offers hundreds of products that monitor and control pumps, generators, and more. Our control systems for industrial operations monitor pressure, temperature, liquid level, overspeed, time and vibration. We cover it all, from simple start/stop operation to sophisticated automation systems incorporating microcontrollers and remote communications.We provide cost-effective, perfectly suited products for our customers, and have been doing it for over 70 years.

LM300 SERIES

The LM300 Series Level Maintainer automatically adds oil to the crankcase as needed to keep the lube level normal. Most models have built-in switches that will alarm and/or shut down

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L971 SERIES

The Murphy L971 Series Level Switch detects low oil level in a compressor’s crankcase. As oil level in the crankcase depletes, the float on the L971 switch falls, and when

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LM500 / LM500-TF

The LM500 maintains oil level on any size engine. As crankcase oil level drops, the LM500 float also drops and opens the Thumb-Valve™. This allows oil to flow from the supply tank

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L129 SERIES

The L129 Series Lube Level Swichgage instrument is a combination lube level indicating gage and adjustable low and high limit switches. It provides protection against low oil level or high

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EXHAUST PYROMETERS

Single 10705147 and Dual 10705146 Port Pyrometers monitor exhaust temperatures in all types of engines. The Dual Port Pyrometer can monitor each bank of a V-type engine allowing you to

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MT90

The Murphy Selectronic MT90 digital tachometer offers high accuracy and dependability resulting from use of a quartz crystal time-base and digital, solid-state electronics. Tachometer power is supplied by either a Murphy magnetic pickup mounted

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OPL SERIES SWICHGAGE®

The OPL-series pressure Swichgage instruments are combination pressure indicating gages with adjustable low and high limit switches. Limit switches can be wired directly to electric pilot circuits to operate alarms,

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45APE SERIES SWICHGAGE®

The 45APE Series Swichgage instrument is a mechanical gage for pressure indication. It includes two adjustable SPDT switches. These snap-acting switches can be used for start and stop, to trip

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PT167EX

The Murphy PT167EX is a pressure Swichgage instrument connected to a threaded pressure diaphragm housing. The Swichgage instrument is enclosed in an explosion-proof case and is CSA rated for Class

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AT / ATH TACHOMETERS

The AT Series tachometer is a rugged instrument with solid-state circuitry for indication of engine RPM. It is equipped with a ring nut for mounting into a standard 3-3/8 in. (86 mm) dash

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