FW Murphy, was born out of one man's search for simple, reliable engine protection. While Frank W. "Pat" Murphy was a sales manager for a major equipment distributor in the 1930's, he found that his customers' main complaint was "burned up" engines. They were equipped with poor quality, non-indicating safety switches which were difficult to test and often inoperative. Pat decided to develop a simpler yet more effective "Safety Switch". 
Pat's idea, later renamed the SWICHGAGE®, was to combine an indicating gauge with a switch that would stop the engine when low oil pressure or high coolant temperature existed. It was a simple design, easy to understand – and it worked well. Operators loved the new design because they could see the operating gauge, adjust the trip point to their needs, and test the switch for operation.
His invention was so well accepted, Pat decided to devote 100% of his time to manufacturing his "Murphy Safety Switch." Production began with Pat and his wife, Rosalie, building the instruments on their kitchen table in Mt. Carmel, Illinois, USA.
Our production facilities have come a long way. Tulsa USA is headquarters to a worldwide Murphy family with design and production and facilities in Texas, UK and China, with a worldwide network of Murphy-approved stockists and dealers.
Our catalogue has hundreds of products for the monitoring and control of engine driven applications: off-road, construction and agricultural equipment; marine propulsion; power generation; pumps and compressors. Our instrument and control systems monitor engine 'vital signs' such as pressure, temperature, fluid level, speed and vibration. We cover it all, from simple gauges and fault switches to sophisticated display, automation and fault protection systems. Many products and systems carry major international authority approvals.
Constant improvements and new product developments give our customers the most advanced technology, including instruments for the latest J1939 CANbus engines, microprocessor controllers and remote monitoring/control via telecommunications and computer supervised systems.
Murphy's success is based on our desire to provide excellence in customer service. We provide reliable and cost-effective products for our customers, and have been doing it since 1939. That’s more than 60 years of developing control solutions without limits.
Products: catalogue section
- Pressure & Vacuum
- Temperature
- Fluid Level
- Vibration, Time & Speed
- Magnetic Switch & Annunciators
- Engine Panels
- Engine Controls
- Compressor Controls & Panels
- Valves
- Electric Gauge & Swichgage
- Gen-Set Controls
- Murphylink J1939 Canbus
Murphy VietNam
GNN VIETNAM
Headquarter Office: 153 Nguyen Van Thu, Đakao Ward, Dist.1, HCMC.
Transaction Office: 33 Hoa Hong, Ward 2, Phu Nhuan District, HCMC.
Tel : (084.8) 3 517 4923 I Fax: (084.8) 3 517 4924