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Suitable for engines or electric motors with appropriate Murphy magnetic switch or transformer relay assemblies. An SPST toggle switch is provided to override the low limit contact for equipment start-up. Inside the OPLC-A-100, pointer closure against either of the adjustable contacts completes the pilot-duty circuit. MURPHY, DIRECT MOUNT TEMPERATURE SWITCH, TSB-R165/180.250-1/4. This instrument is a combination pressure indicating gage with an adjustable low and high limit switch. The limit switch is accessible from the front of the gage and the contacts have a self-cleaning motion to enhance electrical continuity. MURPHY, DIRECT MOUNT TEMPERATURE SWITCH, TSB-R230-3/8. The OPLC-S-5000 is a surface mounting 4.5' (114 mm) Pressure Swichgage, with a range of 0-5000 psi (0-34.48 MPa) 0-350 bar. The limit switch can be wired directly to electric pilot circuits to operate alarms and/or shutdown engines and. The limit switch can be wired directly to electric pilot circuits to operate alarms and/or shutdown engines and electric motors. The OPLC-A-1000 is a surface mounting 4.5' (114 mm) Pressure Swichgage, with a range of 0-1000 psi (0-6.89 MPa) 0-70 bar. The OPL-series pressure gage instruments are combination pressure indicating gages with adjustable low and high limit switches. If you are unable to find the product that you need, please call us at 91. This instrument is a combination pressure indicating gage with an adjustable low and high limit switch. Diesel Parts Direct carries a large selection of Murphy controls and instruments. FW Murphy Production Controls offers support for all our products. The limit switch can be wired directly to electric. The limit switch can be wired directly to electric pilot circuits to operate alarms and/or shutdown engines and electric motors. Features: Combination indicating gauge and limit switch. This instrument is a combination pressure indicating gage with an adjustable low and high limit switch. DetailsThe OPLC-A-100 is a surface mounting 4.5' (114 mm) Pressure Swichgage, with a range of 0-100 psi (0-689 kPa) 0-6.89 bar. This instrument is a combination pressure indicating gage with an adjustable low and high limit switch. These switches are used for tripping alarms and/or shutdown devices. The OPLC-A-100 is a surface mounting 4.5" (114 mm) Pressure Swichgage®, with a range of 0-100 psi (0-689 kPa). The OPLC-A-100 is a surface mounting 4.5' (114 mm) Pressure Swichgage, with a range of 0-100 psi (0-689 kPa) 0-6.89 bar.