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FW Murphy

1. Pressure Transmitters & OPL Series Pressure Swichgage®

The PXT-K Series Pressure Transmitters, rugged instruments with extremely small temperature error and class-leading EMI/RFI resistance, are state-of-the-art instruments providing 4-20 mA output. 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, shutdown or start/stop of engines and electric motors.

2. SDB Series Temperature Swichgage® & Thermocouple

The direct-mounting SDB Series temperature Swichgage® devices provide an accurate direct-reading gauge with an adjustable limit switch to activate alarms and/or shutdown. Murphy's new thermocouples are encased in a 1/4” diameter 316 stainless steel tubing sheath with stainless steel Bell Spring for strain relief. They incorporate Type K, 20 AWG stranded extension wire encased in a rugged cable to meet demanding environments.

3. SPL Series 4.5" Surface Mount Temperature Swichgage®

The SPL Series Swichgage® instruments are combination indicating gage and critical temperature limit switches. Each model includes adjustable, electrical contacts that can be used for start and stop, to trip alarms and to shut down equipment. High and low temperature limit contacts are visible and adjustable. Typical applications include gas compressors, heaters and coolers, water pump temperature, engine coolant temperature, and process temperature.

4. Level Maintainers & Scrubber Level Switches

Lube Level Maintainers automatically add oil to the crankcase as needed to keep the lube level normal. Most models have built-in switches that will alarm and/or shutdown the equipment if the makeup supply is depleted and engine oil level falls, or if overfill conditions exist. Liquid Level Switches are float activated to operate an electrical SPDT reed switch for annunciation/pilot signal for indication of high level to an annunciator, controller or PLC, while pneumatic-vent level devices are used to operate dump valves or similar devices. The diaphragm operated scrubber dump valve opens and closes automatically by pneumatic control from your level controller and dump valve operator.

5. Vibration Switches & Timers

The VS2 Series switches are shock sensitive mechanisms for shutdown of engine or electric motor powered equipment. These switches use a magnetic latch to ensure reliable operation. Ideal for use on engines, pumps, compressors, heat exchangers and pumping units, the VS2 Series can be used anywhere shutdown protection from damaging shock/vibration is desired. Murphy Time Switches can automatically start or stop engines or electrical motors after a predetermined time. These time switches can be wired for an open or closed circuit when time expires. Designed for use in the oil field, irrigation systems or anywhere equipment must operate or be controlled for a predetermined time, these switches feature a precision movement that gives years of reliable service.

6. Ignition & Emissions Controllers and Accessories

This section features Ignition and Emissions Controllers developed and built by FW Murphy. Many of their coils, output harnesses and cables are listed as well. These quality products provide better performance through fuel efficiency, automation, and state-of-the-art technology.

7. Valves: Pulsation Dampener & Electromechanical Fuel Shutoff

The PD8100 Series Pulsation Dampeners eliminate pointer flutter on pressure indicating Swichgage® devices which are subject to pulsating pressure from reciprocating pumps or compressors. They also allow a close setting of high and low contact points providing for more accurate pressure indication and control of equipment.

8. RTD Series Resistance Temperature Detectors

RTD and RTDT Series Resistance Temperature Detectors are highly reliable and include a 316L Stainless Steel Thermowell sheath that provides protection to the spring-loaded element. The cast aluminum connecting head meets NEMA 4 requirements and includes an RTD transmitter or a thermocouple/ RTD terminal block mounted on ceramic Steatite and rated NEC Class 2.

9. TDXM-DC Temperature Scanner / Pyrometer

The TDXM-DC is a configurable 24 channel temperature scanner/pyrometer with a built-in power supply, MODBUS Communications and programmable trip points.

10. Accessories

Items which can optionally accompany others. These include additional kits and replacement parts.