Magnetic switches operate basically as a latching relay, and are available for use with engines or electric motors. For distributor ignition engines, the magnetic switch opens the distributor coil circuit to cause shutdown. For magneto or CD ignitions the magnetic switch grounds the ignition output. Some models can also trip fuel valves instead of or in addition to grounding the ignition. Diesel engines are shut down by either closing off the fuel or air supply. Magnetic switches can make or break circuits for these engines.

Various circuits, time delays, and contact configurations are available to match the power source and mode of operation required for alarm only, alarm before shutdown or shutdown only. For electric motor applications, various magnetic switches are available to operate the motor starter, holding coil directly or in conjunction with the appropriate Murphy Transformer-Relay assembly.

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The PSB Switch is a direct mount switch for critical pressure points. It has one limit contact that can be used to activate an alarm, actuate indicator lights or shutdown equipment. A glass-filled nylon terminal block with quick screw terminal connections gives the PSB switch a real advantage in industrial engine applications in general purpose non-classified areas. The PSB is ideal when a reading is not desired, but pressure is critical to operational efficiency.

If you wish to continue with a credit card purchase, please note the following instructions:

When you are prepared to purchase an item, do not click the "buy" button on this specific page any page that shows multiple items and multiple "buy" buttons, as the item will not be added to your shopping cart from any page at this level. To successfully add an item to your shopping cart, you must drill down to the next level where a single item is shown on a page and click the "buy" button that appears on that page. You will recognize this final level by the larger product image and a more detailed product description.

After clicking the "buy" button on this product page, a new shopping cart page will automatically open and you will see your chosen item in the shopping cart.

The TSB is a direct mount switch for temperature sensing. It has one limit contact that can be used to activate an alarm, actuate indicator lights or shut down equipment. The model features a specially coated steel housing to resist corrosion, an easy wiring terminal block, and time proven Swichgage® construction.

If you wish to continue with a credit card purchase, please note the following instructions:

When you are prepared to purchase an item, do not click the "buy" button on this specific page any page that shows multiple items and multiple "buy" buttons, as the item will not be added to your shopping cart from any page at this level. To successfully add an item to your shopping cart, you must drill down to the next level where a single item is shown on a page and click the "buy" button that appears on that page. You will recognize this final level by the larger product image and a more detailed product description.

After clicking the "buy" button on this product page, a new shopping cart page will automatically open and you will see your chosen item in the shopping cart.

Lens & Switch Assembly: For the EL150K1 Liquid Level Swichgage®.

Murphy Time Switches can automatically start or stop engines or electrical motors after a predetermined time. Commonly used in oil fields or irrigation systems.

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When you are prepared to purchase an item, do not click the "buy" button on this specific page any page that shows multiple items and multiple "buy" buttons, as the item will not be added to your shopping cart from any page at this level. To successfully add an item to your shopping cart, you must drill down to the next level where a single item is shown on a page and click the "buy" button that appears on that page. You will recognize this final level by the larger product image and a more detailed product description.

After clicking the "buy" button on this product page, a new shopping cart page will automatically open and you will see your chosen item in the shopping cart.

Electronic Speed Switches: Single or dual switch point models for Overspeed, Crank Termination and Overspeed, with switch points that are field adjustable.

If you wish to continue with a credit card purchase, please note the following instructions:

When you are prepared to purchase an item, do not click the "buy" button on this specific page any page that shows multiple items and multiple "buy" buttons, as the item will not be added to your shopping cart from any page at this level. To successfully add an item to your shopping cart, you must drill down to the next level where a single item is shown on a page and click the "buy" button that appears on that page. You will recognize this final level by the larger product image and a more detailed product description.

After clicking the "buy" button on this product page, a new shopping cart page will automatically open and you will see your chosen item in the shopping cart.