MurCal is an Authorized Distributor of FW Murphy products. The OPLC-A-600 has a weatherproof die cast aluminum case, a clear polycarbonate lens, a 1/4 NPT process connection, a grade A phosphor bronze bourdon tube (brass tip/silver brazed) and a brass socket. 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-600, pointer closure against either of the adjustable contacts completes the pilot-duty circuit. The limit switch is accessible from the front of the gage and the contacts have a self-cleaning motion to enhance electrical continuity. The limit switch can be wired directly to electric pilot circuits to operate alarms and/or shutdown engines and electric motors. This instrument is a combination pressure indicating gage with an adjustable low and high limit switch. The OPLC-A-600 is a surface mounting 4.5" (114 mm) Pressure Swichgage®, with a range of 0-600 psi (0-4.14 MPa). NGK Industrial Spark Plugs
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